Excel 10
W7752D,E,F,G,J AND W7754K,L,M,P
FAN COIL UNIT CONTROLLERS
LNS PLUG-INS
HONEYWELL EXCEL 5000 OPEN SYSTEM
USER GUIDE
CONTENTS
Introduction .................................................................................................................................................................................. 1
Description of Devices ................................................................................................ 1
Products Covered ....................................................................................................... 2
Organization of Manual............................................................................................... 2
Applicable Literature ................................................................................................... 2
Product Names ........................................................................................................... 2
Control Application...................................................................................................... 3
Control Provided ......................................................................................................... 3
Setpoints.......................................................................................................... 4
Bypass............................................................................................................. 6
LED/LCD ......................................................................................................... 6
Energy-Saving Features.................................................................................. 6
Occupancy Status............................................................................................ 7
Safety Features ............................................................................................... 8
Operating Modes ............................................................................................. 8
Construction................................................................................................................ 9
Excel 10 W7752 FCU Controllers.................................................................... 9
Excel 10 W7754 FCU Controllers.................................................................... 9
Controller Performance Specifications........................................................... 11
Configurations........................................................................................................... 12
General.......................................................................................................... 12
Fan Type ....................................................................................................... 12
Type of Heating and Cooling Equipment ....................................................... 13
Reheat Output ............................................................................................... 14
Digital Input.................................................................................................... 14
Excel 10 Wall Module Options....................................................................... 15
Abbreviations and Definitions.................................................................................... 16
Application Steps ....................................................................................................................................................................... 17
Overview................................................................................................................... 17
Step 1. Plan the System............................................................................................ 17
Step 2. Determine Other Bus Devices Required....................................................... 17
Step 3. Lay Out Communications and Power Wiring ................................................ 18
LONWORKS Layout ......................................................................................... 18
Power Wiring ................................................................................................. 19
Step 4. Prepare Wiring Diagrams ............................................................................. 19
General Considerations................................................................................. 19
Terminal Block Assignment and Wiring Example for the W7752 Controller... 21
Terminal Block Assignment and Wiring Example for the W7754 Controller... 22
LONWORKS Termination ................................................................................. 23
Step 5. Order Equipment .......................................................................................... 24
Step 6. Configure Controllers.................................................................................... 25
General.......................................................................................................... 25
Output............................................................................................................ 26
Input............................................................................................................... 27
Equipment Control......................................................................................... 28
Fan ................................................................................................................ 28
Switching Levels............................................................................................ 29
Zone Options................................................................................................. 29
Miscellaneous................................................................................................ 29
® U.S. Registered Trademark
Copyright © 2009 Honeywell Inc.
All Rights Reserved
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
INTRODUCTION
Description of Devices
The W7752D,E,F,G, and J Controllers and W7754K,L,M,N,
and P Controllers are Fan Coil Unit Controllers belonging to
the Excel 10 product line. Excel 10 FCU Controller systems
control the space temperature in a given room by regulating
the heating and/or cooling equipment which control the tem-
perature of the air delivered to that space and the fan which
controls air flow. Reheat coils are often included at the fan coil
unit. Excel 10 FCU Controllers are capable of stand-alone
operation; however, optimum functional benefits are achieved
when the network communication capabilities are used.
The wall modules are available in a variety of models
incorporating various combinatinos of the following options:
•
•
•
•
Setpoint adjustment
Bypass pushbutton and LED
Fan Switching
See Table 7 on page 12 for a complete list of wall
modules options
Excel 10 FCU Controllers connect to a LonWorks network and
interoperate with 3rd-party nodes.
A family of direct wired wall modules with a temperature
sensor for space temperature measurement, setpoint adjust-
ment, bypass push-button, status LED, and LCD display can
be used in conjunction with Excel 10 FCU Controllers.
Excel 5000
LonWorks network
PCLTA20
PCC10
Honeywell
Excel 10 W7752
FCU Controller
Honeywell
Excel 10 W7754
FCU Controller
Excel 10
wall module
Excel 10
wall module
Fig. 1. Typical system overview
1
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Products Covered
Product Names
This System Engineering Guide describes how to apply the
Excel 10 FCU Controllers and the accessories to typical FCU
applications. The specific devices covered include:
• W7752D,E,F,G, and J FCU Controllers.
• W7754K,L,M,N, and P FCU Controllers.
• T7460 Wall Modules.
The W7752 Controller is available in five models:
• W7752D FCU Controller with 230 Vac power supply and
with relay suitable for reheat applications.
• W7752E FCU Controller with 230 Vac power supply
without reheat relay.
• W7752F FCU Controller with 115 Vac power supply with
reheat relay suitable for reheat applications.
• W7752G FCU Controller with 115 Vac power supply
without reheat relay.
• T7560 Wall Modules.
Organization of Manual
• W7752J FCU Controller with 100 Vac power supply
without reheat relay.
The Introduction and Application Steps 1 through 5 provide
the information needed to make accurate ordering decisions.
Application Step 6 and the Appendices include configuration
engineering that can be started using a LNS tool after the
devices and accessories are ordered. Application Step 7 is
troubleshooting. Information provided in support of the use of
third-party LonWorks communication packages to configure
FCU Controllers is found in the Appendices.
The W7754 Controller is available in five models:
•
W7754K FCU Controller with 230 Vac power supply, one
triac output, and one digital output suitable for attachment
to a solid-state relay employed for low-voltage Pulse-
Width Modulated (PWM) control in high-current electric
reheat applications.
•
W7754L FCU Controller with 24 Vac power supply and
two triac outputs.
The organization of the manual assumes a project is being
engineered from start to finish. If you are adding to, or
changing an existing system, the Table of Contents can guide
you to the relevant information.
•
•
W7754M FCU Controller with 230 Vac power supply.
W7754N FCU Controller with 230 Vac power supply and
two triac outputs.
•
W7754P FCU Controller with 230 Vac power supply, four
triac outputs, and an extra, fourth relay suitable for reheat
applications.
Applicable Literature
The following is a list of documents that contains information
related to the Excel 10 FCU Controller. Form No.
Title
The FCU Controllers can use any of the following Excel 10
wall modules:
• T7460A with temperature sensor.
• T7460B with temperature sensor and setpoint adjustment.
• T7460C with temperature sensor, setpoint adjustment, and
bypass button and LED.
EN0B-0376GE51
EN0B-0453GE51
EN1B-0250GE51
EN1B-0251GE51
EN2B-0285GE51
74-3083
Excel 10 W7752D,E,F,G,J FCU
Controller Specification Data
Excel 10 W7754K,L,M,N,P FCU
Controller Specification Data
Excel 10 W7752D,E,F,G,J FCU
Controller Installation Instructions
Excel 10 W7754K,L,M,N,P FCU
Controller Installation Instructions
Excel 10 FCU Controller LNS Plug-Ins
User Guide
• T7460D with temperature sensor, setpoint adjustment and
5-position fan switch.
• T7460E with temperature sensor, setpoint adjustment,
bypass button and LED, and 3-position fan switch.
• T7460F with temperature sensor, setpoint adjustment,
bypass button and LED, and 5-position fan switch.
• T7560A with temperature sensor, unit enable button,
setpoint adjustment, bypass button, LCD display and
configurable fan override with up to five settings.
Excel 10 T7460 Wall Modules
Specification Data
95-7610
Excel 10 T7460 Wall Modules
Installation Instructions
Other products:
• C7608A Return Air Sensor
Refer to the Table 15 (see Application Steps, Step 5. Order
Equipment) for complete listing of all available part numbers.
EN0B-0237GE51
EN1B-0146GE51
95-7554
Excel 10 T7560 Wall Modules
Specification Data
Excel 10 T7560 Wall Modules
Installation Instructions
Excel 10 FTT/LPT 209541B Termination
Module Installation Instructions
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Control Application
Fan coil unit systems in commercial buildings control room
temperature through the control of heat and/or cold water
valves and fan speed. Electric reheat coils may also be used
in the system. The Excel 10 FCU Controller is located in the
FCU and is typically connected to an Excel 10 wall module
which incorporates a temperature sensor, setpoint and fan
speed controls, and a bypass or override button. Fig. 2 shows
a typical FCU ontrol application.
window
contact
e.g. Excel 10 W7754
FCU Controller
Honeywell
D-71101 Schönaich
Made in Germany
Excel 10
wall module
LonWorks network
Fig. 2. Typical Fan Coil Unit control application
Control Provided
Excel 10 FCU Controllers provide room temperature control
for two- and four-pipe fan coil units with optional electric
heating coil. The basic control sequence is shown in Fig. 3.
As space temperature falls below the heating setpoint, the
heating output is increased. As space temperature
increases above the cooling setpoint, the cooling output is
modulated to 100%. Switching levels for staged
heating/cooling and fan speeds are configurable. The fan
may still be configured to run continuously during the zero
energy band in the "occupied" mode. Additional
Excel 10 FCU Controllers use a PID control algorithm in
which each of the three parameters can be configured.
There are additional configurable boost parameters ("PID
Boost:" "Cooling" and "Heating") which specify a range
outside of which the heating or cooling outputs are turned
ON fully for faster response (in the case of thermal
actuators, this specifies the control hysteresis). The
controllers are delivered with factory defaults for each of the
parameters.
configurable fan control features include fan minimum
ON/OFF times, run-up, and overrun-times.
3
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Fig. 3. Control sequence diagram
Setpoints
When the Excel 10 FCU Controller is in the "unoccupied"
mode, the remote setpoint knob is ignored, and the con-
figured setpoints for this mode are used instead.
Setpoint Knob
The Excel 10 FCU Controllers may be hardwired to an Excel
10 wall module equipped with a setpoint knob. When the
Excel 10 FCU Controller has been configured (using the LNS
plug-in tool) to read input from the wall module's setpoint
knob, the value from the setpoint knob is used to calculate the
"occupied" setpoint for the heating and the cooling modes.
There are two configurations which determine how the
setpoint used by the control algorithm is calculated: "relative"
(or "offset") and "absolute middle". When configured for
"relative", the Excel 10 wall module setpoint knob represents
a number from -9...+9 DDF(-5...+5 K) which is added to the
configured "occupied" and "standby" setpoints for the heating
and the cooling modes. When configured to "absolute
middle", the setpoint knob becomes the mid-point of the Zero
Energy Band (ZEB) extending between the "occupied" or
"standby" setpoints for the heating and the cooling modes.
The range of the ZEB is found by taking the difference
between the "occupied" or "standby" setpoints configured for
the heating and the cooling modes; in the case of "absolute
middle", the current "occupied" and "standby" setpoints are
therefore found as follows:
Setpoint Limits
Setpoints are limited to the range of 50...95°F (10...35°C).
The value of the setpoint knob is limited to the range provided
by the configuration parameters Maximum Limit Setpoint pot
and Minimum Limit Setpoint pot. In the case of absolute
"occupied" and "standby" setpoints, the setpoint knob still
represents the mid-point of the ZEB, even when set to either
of these limits. The actual setpoints are given by the
equations shown above. When the setpoint knob is configured
to be "relative", the lowest actual "occupied" setpoint allowed
is equal to SptHeatOcc - SptKnobLowLim, and the highest
allowed is equal to SptCoolOcc + SptKnobHiLim. The lowest
and highest "standby" setpoints are found in an analogous
fashion.
Setpoint from Network
When the Excel 10 FCU Controller is not configured to be
hardwired to a wall module, nviSetPoint must be bound to
another node that provides a setpoint. When bound and when
a valid update is received, nviSetPoint is used with the
appropriate ZEB:
When the Excel 10 FCU Controller is in the "occupied" mode:
nvoActiveSetPt (in cooling mode) =
nvoSensor.remote_set_point + (Cooling Occupied
Setpoint - Heating Occupied Setpoint) / 2
nvoActiveSetPt (in heating mode) =
•
•
ZEBoccupied = Cooling Occupied Septoint - Heating
Occupied Setpoint
ZEBstandby = Cooling Standby Setpoint - Heating
Standby Setpoint
nvoSensor.remote_set_point - (Cooling Occupied
Setpoint - Heating Occupied Setpoint) / 2
for Standby:
nvoActiveSetPt (in cooling mode) =
The "unoccupied" setpoint does not depend on nviSetPoint at
all.
nvoSensor.remote_set_point + (Cooling Standby
Setpoint - Heating Standby Setpoint) / 2
nvoActiveSetPt (in heating mode) =
Setpoint Offset
nvoSensor.remote_set_point - (Cooling Standby
Setpoint - Heating Standby Setpoint) / 2
Third-party nodes may be bound to nviSetPtOffset to shift the
setpoint in the range of -18 to 18 DDF (-10 K to 10 K).
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table 1. Example setpoint values based upon default configuration – "absolute middle" setpoint knob (°C)
occupancy
mode
configured
cooling setpoint heating setpoint
configured
setpoint
knob1
effective cooling
setpoint2,3
effective heating
setpoint2,4
ZEB
"occupied"
"standby"
23
25
28
21
19
16
2
6
21
21
X
22
24
28
20
18
16
"unoccupied"
12
NOTES:
1. Sample value shown. Limited by default configuration settings to the range of 12...30°C.
2. Limited to the range of 10...35°C.
3. = setpoint knob + (ZEB/2)
4. = setpoint knob – (ZEB/2)
Table 2. Example setpoint values based upon default configuration - Relative setpoint knob (°C)
occupancy
mode
configured
cooling setpoint heating setpoint
configured
setpoint
knob1
effective cooling
setpoint2,3
effective heating
setpoint2,4
ZEB
"occupied"
"standby"
23
25
28
21
19
16
2
6
-2
-2
X
21
23
28
19
17
16
"unoccupied"
12
NOTES:
1. Sample value shown. Limited by default configuration settings to the range of -5...+5°C.
2. Limited to the range of 10...35°C.
3. = configured cooling setpoint + setpoint knob
4. = configured heating setpoint + setpoint knob
5
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
determined by nviManOccCmd (provided it has not been
set to OC_NUL).
Bypass
Bypass Mode
When the Excel 10 FCU Controller is in the "unoccupied"
LED/LCD
LED Override
mode, the Excel 10 wall module's bypass push-button may be
used to force the Excel 10 FCU Controller into the "occupied"
mode. The Excel 10 FCU Controller can also be forced into
the "occupied" mode by means of a LONWORKS network
command (when nviManOccCmd is set to OC_BYPASS). The
controller will then remain in "bypass" mode until:
The wall module’s LED indicates that the FCU Controller is
being overridden by either the bypass button or the
LONWORKS network.
•
•
•
LED ON ⇒ "override bypass"
One flash per second ⇒ "override unoccupied"
Two flashes per second ⇒ "override standby" or
"occupied"
1. The bypass timer has timed out, or
2. The user again presses the Excel 10 wall module's
bypass push-button, thus cancelling the "bypass" mode,
or
3. The occupancy schedule (nviTodEvent) switches the
mode to "occupied".
•
•
LED OFF ⇒ no override
Four flashes per second ⇒ The controller is responding to
a LONWORKS network management wink command.
4. nviManOccCmd is set to OC_NUL.
LED Occupancy
The wall module’s LED indicates the effective occupancy
mode.
The Excel 10 wall module indicates the current bypass mode
status (see Excel 10 wall module literature for further
information).
•
•
•
•
LED ON ⇒ effective "occupied" or effective "bypass"
One flash per second ⇒ effective "standby"
LED OFF ⇒ effective "unoccupied"
Four flashes per second ⇒ The controller is responding to
a LONWORKS network management wink command.
Bypass Timer
When the "bypass" mode has been activated, the bypass
timer is set to BypTime (default of 180 minutes), at the end of
which the mode will revert to its original state (see Excel 10
wall module literature for further information).
LCD Display
This mode is used only for T7560 Wall Modules. The
occupancy mode is represented by the following symbols:
Continuous "Unoccupied" Mode
⇒ effective "occupied" or effective "bypass"
⇒ effective "standby"
The continuous "unoccupied" mode is entered when an Excel
10 wall module is configured to allow it and if:
• (in the case of the T7460) the bypass button is pressed for
⇒ effective "unoccupied"
⇒ Controller is OFF
four to seven seconds (until the LED blinks),
• (in the case of the T7560) the bypass button is pressed for
more than five seconds (until the flashing moon appears).
The Excel 10 FCU Controller can also be forced into the con-
tinuous "unoccupied" mode by means of a LONWORKS net-
work command (when nviManOccCmd is set to
OC_UNOCCUPIED). The Excel 10 FCU Controller will then
remain in this mode indefinitely, or until the bypass button is
pressed to exit the mode or a network command is sent to
clear the mode.
and
⇒ Controller is OFF, frost protection is enabled.
Flashing symbols indicate the "override" mode:
⇒ override "occupied" or override "bypass"
⇒ override "standby"
⇒ override "unoccupied"
⇒ The controller is responding to a LONWORKS network
management wink command.
Bypass Push-Button
Excel 10 FCU Controllers may be hardwired to an Excel 10
wall module equipped with a bypass push-button. The bypass
push-button has three possible configurations (see Table 17
for further information):
Energy-Saving Features
The "Standby" Mode
The digital input for reading input from an occupancy sensor
(usually a motion detector) provides the Excel 10 FCU Con-
troller with a means to enter an energy-saving standby mode
whenever there are no people in the room. The "standby"
mode occurs when the scheduled occupancy mode is
"occupied" but the occupancy sensor indicates that the room
is nevertheless currently unoccupied. If no occupancy sensor
is directly connected to the Excel 10 FCU Controller, an
occupancy sensor from another node may be bound to the
network input nviSensorOCC. The Excel 10 FCU Controller
can also be forced into the "standby" mode by means of a
LONWORKS network command (when nviManOccCmd is set to
OC_STANDBY). When in the "standby" mode, the Excel 10
FCU Controller uses the "standby" setpoints configured for
the heating and the cooling modes.
•
•
•
NONE
BYPASS_UNOCCUPIED
BYPASS_ONLY
Override Priority
Excel 10 FCU Controllers can be configured to arbitrate
overrides coming from the bypass push-button and the
network. There are two possible configurations, having the
following meanings:
•
•
LAST_WINS specifies that the last command received
from either the wall module or nviManOccCmd
determines the effective override state.
NETWORK_WINS specifies that, regardless of the wall
module override state, the effective occupancy mode is
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Window Sensor
Optimum Start Gradients
The digital input for reading input from a window contact
There are two parameters, Cool Rec Ramp and Heat Rec
provides the Excel 10 FCU Controller with a means to disable
its temperature control activities if someone has opened a
window or door in the room. If no window sensor is directly
connected to the Excel 10 FCU Controller, the sensor from
another node may be used by binding it to nviWindow. Frost
protection remains active. Normal temperature control
resumes when the window closes.
Ramp, which can be configured to cause the cooling and
heating setpoints respectively to ramp up to their occupied
settings from their unoccupied or standby settings prior to
scheduled occupancy. The Excel 10 FCU Controller uses the
configured rates to determine the optimum time to start
increasing the heating or cooling demand. See the following
figures. The configuration parameters are in K/hour.
Demand Limit Control
When a high-electrical-demand signal is received from an
energy management system via the LONWORKS network
(nviDlcShed), the Excel 10 FCU Controller uses Demand
Limit Control Bump to shift the current setpoint (down for
heating and up for cooling) by the configured value to save
energy.
Fig. 5. Optimum start - cooling
Fig. 4. Optimum start - heating
Occupancy Status
The occupancy status is determined based upon the following table. Manual override may come from nviManOccCmd or from
the bypass push-button.
Table 3. Effective occupancy mode arbitration
scheduled occupancy mode
occupancy sensor status
manual override status
not assigned
not assigned
"occupied"
effective operating mode
OC_OCCUPIED
OC_STANDBY
"occupied"
"occupied"
X
room occupied
room not occupied
X
X
X
X
X
X
X
X
OC_OCCUPIED
OC_UNOCCUPIED
OC_STANDBY
X
"unoccupied"
"standby"
X
"occupied"
"standby"
"standby"
"unoccupied"
"unoccupied"
X=Don't care
"standby"
OC_OCCUPIED
OC_STANDBY
not assigned
"standby"
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
not assigned
"standby"
7
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Safety Features
Frost Protection
Fan Failure Protection
If the room temperature falls below 46.4 °F (8 °C), the Excel
10 FCU Controller enables the heating circuit to ensure frost
protection and an alarm is issued. When the temperature
rises above 48.2 °F (9 °C) again, the heating circuit is turned
OFF again.
When configured with an airflow detector, the Excel 10 FCU
Controller protects equipment by switching OFF heating /
cooling outputs and issuing an alarm when the fan fails.
Fan Interlocks
The Excel 10 FCU Controller can be configured such that
heating and/or cooling outputs are never ON unless the fan is
running. A fan run-up time can be configured to turn ON the
fan prior to the heating/cooling outputs being switched ON,
and a fan overrun time can be configured to keep the fan
running for a period of time after the heating/cooling outputs
are switched OFF.
Smoke Control
The Excel 10 FCU Controller will respond to LONWORKS
network emergency commands by switching OFF
heating/cooling outputs and switching OFF the fan
(depressurize) or switching ON the fan at its highest speed
(pressurize). An alarm is issued for any emergency
commands
Operating Modes
The possible modes of operation are listed in Table 4.
Table 4. Modes of operation for Excel 10 FCU Controller
mode
description
events causing a transition to this mode
operational modes (NV reference)
START-UP AND
WAIT
Control algorithms are disabled. Outputs stay in
their initial positions. Physical inputs are periodically
read and digital filtering of analog inputs is turned
OFF to speed up settling time. Input NVs are
received and output NVs are sent periodically.
This is the first mode after an application restart.
FLOATING
The Excel 10 FCU Controller drives the floating
When the effective occupancy changes to
"unoccupied" or "standby", after start-up, after 24
hours since the last positioning, or after each
positioning to 0%, the Excel 10 FCU Controller
transitions to this mode.
OUTPUTS SYNCH control valves to their initial positions and then
transitions to one of the control modes.
COOLING
The Excel 10 FCU Controller is controlling in the
cooling mode.
Network input nviApplicMode has a value of
HVAC_COOL or HVAC_AUTO and the space
temperature is above the cooling setpoint.
HEATING
The Excel 10 FCU Controller is controlling in the
heating mode.
Network input nviApplicMode has the value of
HVAC_HEAT or HVAC_AUTO and the space
temperature is below the heating setpoint.
MANUAL MODE
The control algorithms stay active and outputs are
controlled automatically until set individually to test MODE_MANUAL.
positions using the input NV nviTest.
Network input nviManualMode has value of
FACTORY TEST
DISABLED
Control algorithm is disabled; a special factory test This mode is for factory testing, only.
program runs.
Control algorithms are terminated, outputs are
Network input nviManualMode has a value of
turned OFF (turn-OFF sequences and interlocks are MODE_DISABLED.
active). Frost protection is disabled.
PRESSURIZE
Heating/cooling outputs are switched OFF, and the Network input nviEmerg containing smoke control
fan is switched ON at its highest speed.
signal from the LONWORKS network has the value
of EMERG_PRESSURIZE.
DEPRESSURIZE
Heating, cooling, and fan outputs are switched OFF. Network input nviEmerg containing smoke control
signal from the LONWORKS network has the value
of EMERG_DEPRESSURIZE.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Construction
Excel 10 W7752 FCU Controllers
Excel 10 W7754 FCU Controllers
The Excel 10 W7752 FCU Controller is available in five basic
models, each with two different possibilities for LONWORKS
transceivers. All of these controllers are mains-powered, and
two models are equipped with an additional high-power relay
for applications with electric reheat. Table 5 shows the
differences between models.
The Excel 10 W7754 FCU Controller is available in five basic
models, each with two different possibilities for LONWORKS
transceivers. Table 6 shows the differences between models.
Table 6. Excel 10 W7754 FCU Controller models
OS number
W7754K1001
W7754L1009
W7754M1007
W7754N1004
W7754P1000
power input
230 Vac
24 Vac
reheat relay
Table 5. Excel 10 W7752 FCU Controller models
OS number
W7752D2007
W7752E2004
W7752F2002
W7752G2000
W7752J2003
power input
230 Vac
230 Vac
115 Vac
115 Vac
100 Vac
reheat relay
X
230 Vac
230 Vac
230 Vac
X
X
All wiring connections to the controllers are made at screw
terminal blocks accessible beneath a plastic safety cover.
Mounting dimensions are shown in Fig. 7 on page 10.
All wiring connections to the controllers are made at screw
terminal blocks accessible beneath a plastic safety cover.
Mounting dimensions are shown in Fig. 6 on page 10.
CAUTION
If Excel 10 FCU Controllers are mounted vertically and
thermal actuators are used, the transformer must not
be located below the electronics due to heating
effects.
WARNING
Electrical Shock Hazard.
Mains power at terminal block can cause personal
injury or death. Excel 10 FCU Controllers must be
mounted inside their fan coil unit boxes to prevent
access by unauthorized personnel.
To reduce the risk of fire or electric shock, install in a
controlled environment relatively free of contaminants.
9
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Fig. 6. W7752 dimensions, in inches (mm)
180
59.5
UNUSED ON UNUSED
W7754Kxxxx
230 Vac, 50/60 Hz
max. 5 VA unloaded
Honeywell
D-71101 Schönaich
Made in Germany
WALL MOD.
DI2
USED
0345
USED
110
90
130
triac
10A
2 A
0.5 A
8
9
10 11 12
+ -
1
2
3
4
5
6
7
131415161718 192021222324 2526
2A/M
III II
I
N
L
230 V
L
N
5 3 4 2
1
OUT1 OUT2
230 Vac
LON
230 V
T7460 / T7560
terminal protection
cover (optional)
Fig. 7. W7754 dimensions, in mm
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Hardware
Output
Controller Performance Specifications
Power:
Fan Coil Unit Controller
Object #8020
W7752D and W7752E; W7754K,M,N,P
230 Vac +10%, -15%, 50/60 Hz.
W7752F and W7752G
115 Vac +10%, -15%, 50/60 Hz.
W7752J
100 Vac ±6%, 50/60 Hz.
W7754L
nvoHeatOutput
SNVT_lev_percent
nviSpaceTemp
SNVT_temp_p
nv3
nv4
nv5
nv1
nv2
Mandatory
Network
Variables
nvoCoolOutput
SNVT_lev_percent
nviSetPoint
SNVT_temp_p
24 Vac ±20%, 50/60 Hz.
nvoFanSpeed
SNVT_switch
Operating Temperature:
32...122°F (0...50°C).
nvoTerminalLoad
SNVT_lev_percent
nviFanSpeedCmd
SNVT_switch
nv11
nv12
nv13
nv14
nv6
nv7
nv8
Shipping/Storage Temperature:
-40...+158°F (-40...+70°C).
nvoLoadAbs
SNVT_power
nviOccCmd
SNVT_occupancy
Relative Humidity:
Optional
Network
Variables
nvoDischAirTemp
SNVT_temp_p
5% to 95% non-condensing
nviApplicMode
SNVT_hvac_mode
Inputs:
nvoReheat
SNVT_switch
nviSetPtOffset
SNVT_temp_p
Temperature Sensor:
20k ohm NTC
nv9
nvoSpaceTemp
SNVT_temp_p
nv15
nviWaterTemp
SNVT_temp_p
Setpoint Potentiometer:
10k ohm
nv10
nv17
nv18
nvoEffectSetPt
SNVT_temp_p
nv16
nv19
nviDischAirTemp
SNVT_temp_p
Digital Input:
nvoEffectOcc
SNVT_occupancy
Closed ≤ 400 ohms
Open ≥ 10 K ohms
nviEnergyHoldOff
SNVT_switch
nvoEnergyHoldOff
SNVT_switch
nv20
nv21
Outputs:
Triac voltage range:
24 Vac ± 20%.
nvoUnitStatus
SNVT_hvac_status
Triac max. current ratings:
250 mA continuous
650 mA surge for 30 sec.
Configuration Properties
nc49 - nciSndHrtBt
nc52 - nciMinOutTm SNVT_time_sec
nc48 - nciRcvHrtBt
nc17 - nciLocation
nc60 - nciSetPnts
nc59 - nciNumValve
SNVT_time_sec
mandatory
optional
optional
optional
IMPORTANT:
SNVT_time_sec
SNVT_str_asc
SNVT_temp_setpt mandatory
When any device is energized by a triac, the device
must be able to sink a minimum of 15 mA. If non-
Honeywell motors, actuators, or transducers are to
be used with Excel 10 FCU Controllers, compatibility
must be verified.
SNVT_count
optional
Manufacturer
Defined
nviSensorOcc
SNVT_Occupancy
nvoSensorOcc
SNVT_occupancy
Section
Fan relays voltage range:
20 to 253 Vac
nviEmerg
SNVT_hvac_emerg
nvoDigitInState
SNVT_switch
Fan relays max. current rating:
3 A
nviReheatRelay
SNVT_switch
Electric reheat relay voltage range:
20 to 253 Vac
Electric reheat relay max. current rating:
10 A
6 A (UL916)
Hardware
Input
NOT SUPPORTED.
Interoperability
The Excel 10 FCU Controllers use the LonTalk protocol. They
support the LONMARK Functional Profile # 8020 “Fan Coil Unit
Controller”, version 2.0. Fig. 8 shows the implementation
used.
Fig. 8. LONMARK FCU object profile
11
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Configurations
General
Fan Type
The following sections provide an overview of the Excel 10
FCU Controller options related to inputs and outputs. See
Application Step 6. Plug-Ins Configuration Screens for
complete list of configuration options and defaults.
Each fan coil unit controlled by an Excel 10 FCU Controller
can have a fan with up to three different speeds or no fan at
all. Multi-speed fans are switched at the same switching levels
as multi-staged heating control points (see Fig. 9). For
example, a three-speed fan will switch ON its first speed at
the same control level as the first stage of heating or cooling
up until the second stage of heating or cooling where the
second fan speed will switch on. A two stage fan will switch
with the first two stages of a 3-stage heating or cooling
system. Likewise, a single speed fan will turn ON at the first
stage of any multi-staged system. Conversely, a multi-speed
fan may follow multiple switching levels even for single-
staged, floating, PWM, or thermal actuator-based systems.
Table 7. Hardware options summary
option
fan type
possible configurations
no fan
one-speed
two-speed
three-speed
enabled
disabled
two-pipe
four-pipe
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
fan interlock
FCU system type
Hysteresis
output 1 actuator
type
floating
The hysteresis for fan speed extends to the next lower
switching level (or a control level of 0) as is shown in Fig. 9.
For example, the second fan speed will remain ON until the
control level falls below the switching point for the first fan
speed. Minimum ON/OFF times can be configured and will
apply to all fan switching points.
floating mid (one for heat/cool)1
one-stage
two-stage
three-stage
PWM
thermal
floating
output 2 actuator
type
•
Interlock
floating mid (one for heat/cool)1
one-stage
•
A fan interlock can be configured which prevents heating or
cooling outputs from being turned ON in the event of a fan
failure (where an air flow detector is installed to detect fan
failure). When fan interlock is configured, run-up and overrun-
times can be configured to delay switching ON the heating or
cooling equipment after switching ON the fan and delay
switching OFF the fan after the heating or cooling equipment
is switched OFF.
•
•
•
•
•
•
•
•
•
two-stage
three-stage
PWM
thermal
direct
reverse
none
reheat (W7752D and F and
W7754P1000, only)
free use (W7752D and F and
W7754P1000, only)
not used
window closed
occupied sensor
air flow detector
cool changeover
window open
unoccupied sensor
no air flow
heat changeover
movement
no movement
local
shared
valve direction
reheat
The fan can be configured to run continuously during the zero
energy band during occupied periods.
•
digital input
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
wall module option
temperature sensor
type
none
NTC non-linearized
NOTE:
1
The floating-mid option is only for changeover applications
and uses only one of the two outputs.
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Fig. 9. Three-speed fan switching and hysteresis, cooling mode (defaults for switching levels shown)
Valve action can be configured as either direct or reverse.
When in a two-pipe system with a changeover input, a floating
actuator can be used which has the middle position (50%) as
the zero energy position. The cool range is then 0 to 50% and
the heat range 50 to 100%. The output must be configured as
floating-mid.
Type of Heating and Cooling Equipment
Excel 10 FCU Controllers can operate with either two-pipe or
four-pipe systems. A two-pipe system requires a changeover
input to the controller (hardware or network input).
Excel 10 FCU Controllers can operate with a variety of
actuators for heating and cooling equipment. Floating
actuators can be used; this requires that the valve run time be
specified during configuration of the controller.
Multi-stage systems can be controlled with up to three
different stages of heating/cooling control. Switching levels
are specified in % of control level (see Fig. 10) as is a
hysteresis setting which applies to all switching levels.
Heating and cooling switching levels and hysteresis are
specified separately. Min. OFF times can be configured, and
for one-, two- and three-stage systems, a min. ON time can
also be configured.
The actuator runtimes can be configured in the range 20 sec
to 600 sec in steps of 1 second.
Valves will be synchronized by driving the valve fully closed
(150% of the valve run time) under the following conditions:
PWM electronic valves and thermal actuators can also be
connected and can be configured as either direct or reverse
action. The cycle time must be specified during configuration.
In the case of PWM valves, the zero and full positions must
also be configured.
•
•
•
whenever the control level reaches 0% or less;
at power-on;
whenever the occupancy status changes to a lower mode,
e.g., from occupied to standby or unoccupied;
when synchronization has not taken place within the last
24 hours.
•
Additionally, the W7754K1001 features an extra socket
(located to the left of the terminal blocks) containing a digital
output suitable for connection to a solid-state relay employed
for low-voltage PWM control in high-current electric reheat
applications.
Once synchronization has been completed, the output control
will be returned to the normal control loop.
13
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Fig. 10. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown)
sensor contact is closed, the effective occupancy mode will be
"occupied". However, if the TOD schedule indicates an
Reheat Output
W7752D and F Controllers and the W7754P1000 have an
additional high-current (10 A max.; UL916: 6 A max.) output
relay to control an electric reheater (refer to Fig. 2 for sample
application). The reheat output has its own switching level and
hysteresis settings (see Fig. 11). The reheat relay may also
be used as an auxiliary output for other purposes, in which
case the controller must be configured to specify that the
output is under network control instead of the FCU control
algorithm.
occupied state and if the occupancy sensor contact is open,
then the effective occupancy mode will be "standby". The
control algorithm will then control according to the "standby"
setpoints configured for the heating and the cooling modes.
Configuring the digital input for movement or no movement
(dependent upon normally-open or normally-closed contacts)
adds a delay of 15 minutes to the occupancy sensor such that
the space is considered occupied until 15 minutes has
elapsed since the last movement is detected.
If the digital input is configured to read input from a window
open/closed contact, heating, cooling, and fan control will be
disabled while the window is detected open. Frost protection
will be enabled. A set of contacts may be wired in series for
multiple windows. If the window open/closed contact is not
configured, a one-to-one association (binding) of the window
sensor from another controller on the LONWORKS network can
be made. A locally-wired contact can also be used in
combination with the network input, the result being a logical
OR of the inputs.
If the digital input is configured to read input from an air flow
detector (fan status), heating and cooling control will be
disabled for a fan failure (fan ON and no air flow detected).
Fig. 11. Reheat switching and hysteresis (defaults
shown)
The input may also be configured for changeover for a two-
pipe system.
Digital Input
The Excel 10 W7752 FCU Controllers are equipped with a
single digital input which may be configured to accommodate
an occupancy sensor, a window open/closed contact, an air
flow detector (for fan failure detection), or a changeover input.
It is possible to configure this input for either normally-open or
normally-closed contacts for any of the switches.
The Excel 10 W7754 FCU Controllers are equipped with a
second digital input which is permanently assigned (i.e. not
configurable using the plug-in) to the window contact function.
The control algorithm in the Excel 10 FCU Controller uses the
occupancy sensor, if configured, to determine the effective
occupancy mode (see Table 3). If the Time Of Day (TOD)
schedule indicates an occupied state, and the eccupancy
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Excel 10 Wall Module Options
A typical FCU installation will include an Excel 10 wall module
containing a 20k ohm NTC room temperature sensor and
additional features depending on the wall module type (see
Excel 10 wall module literature for further information).
Common Temperature Control (Master/Slave Controllers)
When one or more Excel 10 FCU Controllers serve a
common area and a single temperature sensor is to be used,
a master/slave arrangement can be configured. One Excel 10
FCU Controller is configured for the local wall module with the
desired options. The other Excel 10 FCU Controller(s) will be
configured without wall modules and with certain network
variables bound with the master controller. Refer to
Excel 10 FCU Controllers can use a return air sensor rather
than the sensor in the wall module if it is wired to the wall
module sensor input. Setpoint adjustments can be configured
as relative or absolute, and upper and lower limits can be set.
A configuration option for the fan speed switch allows it to be
disabled if not required. The bypass button can be configured
to override the control mode to "occupied" for a configurable
bypass time and to override the control mode to "unoccupied"
for an indefinite time, or it may be configured to only override
to "occupied". The button may also be used to cancel the
override.
Application Step 6 of this document for more details.
IMPORTANT
The slave units must have the same HVAC
equipment connected to it as the master units.
The slave units will not use any internal temperature
setpoints or control algorithms. The master controller
determines heating/cooling output based upon
setpoints and occupancy and LONWORKS network
command mode status and communicates this to the
slave via the LONWORKS network.
15
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Abbreviations and Definitions
LONWORKS
Echelon® LONWORKS® network for
communication among Excel 10 FCU
Controllers.
CARE
Computer Aided Regulation Engineering;
the PC based tool used to configure
LonWorks devices.
NEC
National Electrical Code; the body of
standards for safe field-wiring practices.
CPU
Central Processing Unit; an EXCEL 5000®
System controller module.
NEMA
National Electrical Manufacturers
Association; the standards developed by an
organization of companies for safe field
wiring practices.
Echelon®
The company that developed the
®
LONWORKS network and the Neuron® chips
used to communicate on it.
NV
Network Variable; an Excel 10 FCU
Controller parameter that can be viewed or
modified over the LONWORKS network.
EMI
Electromagnetic Interference; electrical
noise that can cause problems with
communications signals.
OEM
Original Equipment Manufacturer; the
company that builds the fan coil units.
EMS
Energy Management System; refers to the
controllers and algorithms responsible for
calculating optimum operational parameters
for max. energy savings in the building.
PC
Personal Computer.
Pot
Potentiometer. A variable resistance
electronic component located on Excel 10
wall modules. Used to allow user-adjusted
Setpoints to be inputted into the Excel 10
FCU Controller.
EEPROM
EPROM
Electrically Erasable Programmable Read
Only Memory; the variable storage area for
saving user setpoint values and factory
calibration information.
Erasable Programmable Read Only
Memory; the firmware that contains the
control algorithms for the Excel 10 FCU
Controller.
segment
A LONWORKS section containing no more
than 60 Excel 10s. Two segments can be
joined together using a router.
Subnet
TOD
VA
An LONWORKS segment that is separated by
a router from its Q7750A Zone Manager.
Firmware
Software stored in a nonvolatile memory
medium such as an EPROM.
Time-Of-Day; the scheduling of Occupied
and Unoccupied times of operation.
I/O
I x R
K
Input/Output; the physical sensors and
actuators connected to a controller.
Volt Amperes; a measure of electrical power
output or consumption as applicable to an
ac device.
I times R or current times resistance; refers
to Ohms Law: V = I x R.
Kelvin.
Vac
Voltage alternating current; ac voltage as
opposed to dc voltage.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
engineering process to ensure their implementation when
configuring the controllers. (See section "Step 6. Configure
Controllers" [page 25] for information on the various Excel 10
FCU Controller parameters and on Excel 10 FCU Controller
point mapping.)
APPLICATION STEPS
Overview
Steps one through seven (see Table 8) address con-
siderations for engineering an Excel 10 FCU System. These
Step 2. Determine Other Bus Devices
Required
A max. of 62 nodes can communicate on a single LONWORKS
segment. If more nodes are required, a router is necessary.
Using a router allows up to 125 nodes, divided between two
LONWORKS segments. The router accounts for two of these
nodes (one node on each side of the router). Table 9
steps are guidelines intended to aid understanding of the pro-
duct I/O options, bus arrangement choices, configuration
options and the Excel 10 FCU Controllers’ role in the overall
EXCEL 5000® System architecture.
Table 8. Application steps
Step No.
Description
1
2
3
4
5
6
7
Plan the System
summarizes the LONWORKS segment configuration rules.
Determine Other Bus Devices Required
Lay Out Communication and Power Wiring
Prepare Wiring Diagrams
Order Equipment
Configure Controllers
Troubleshooting
Table 9. LonWorks configuration rules and number of
device nodes
One LONWORKS Segment
Max. No. of Nodes = 62
(Example)
Max. no. of Excel 10 60 nodes (T7460/T7560 wall
Controllers modules are not LONWORKS
nodes)
Step 1. Plan the System
Plan the use of the FCU Controllers according to the job
requirements. Determine the location, functionality and sensor
or actuator usage. Verify the sales estimate of the number of
FCU Controllers and wall modules required for each model
type. Also check the number and type of output actuators and
other accessories required.
Total 62 nodes
Two LONWORKS Segments
Max. No. of Nodes = 125
(Example)
Max. no. of Excel 10 60 nodes (T7460/T7560 wall
Controllers in segment modules are not LONWORKS
number one nodes)
Max. no. of Excel 10 60 nodes (T7460/T7560 wall
Controllers in segment modules are not LONWORKS
number two nodes)
When planning the system layout, consider potential ex-
pansion possibilities to allow for future growth. Planning is
very important to be prepared for adding HVAC systems and
controllers in future projects.
Total 125 nodes
The max. length of an FTT LONWORKS segment is 4600 ft
(1400 m) for a daisy chain configuration or 1650 ft (500 m)
total wire length and (400 m) node-to-node for any other type
of configuration.
notebook PC
using an LNS tool
shielded
interface
cable
NOTE: In the case of FTT LONWORKS segments, the
distance from each transceiver to all other trans-
ceivers and to the termination must not exceed the
max. node-to-node distance. If multiple paths exist,
the longest one should be used for the calculation.
Excel 10
FCU
controller
RS-232
serial
port
LonWorks
SLTA
port
If longer runs are required, add a router in order to partition
the system into two segments.
In addition, all LONWORKS segments require the installation of
a Bus Termination Module. For an FTT LONWORKS segment,
one or two Termination Modules may be required depending
upon the bus configuration. See section "Step 3. Lay Out
Communications and Power Wiring" (page 18) and the
LONWORKS Termination Module subsection in section "Step 4.
Prepare Wiring Diagrams" (page 19) for more details.
Fig. 12. Connecting the portable operator terminal to the
LONWORKS network
The LONWORKS communication loop between controllers must
be laid out according to the guidelines applicable for that
topology. FCU Controllers use FTT technology which allows
daisy chain, star, loop or combinations of these bus
configurations. See section "Step 3. Lay Out Communications
and Power Wiring" (page 18) for more information on bus
wiring layout, and see Fig. 13, Fig. 14, and Fig. 15 in section
"Step 4. Prepare Wiring Diagrams" (page 19) for wiring
details.
It is important to understand the interrelationships between
FCU Controllers on the LONWORKS network early in the job
17
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NOTE: Due to the transformer isolation, the bus wiring does
Step 3. Lay Out Communications and Power
Wiring
not have a polarity; that is, it is not important which
of the two LONWORKS terminals are connected to
each wire of the twisted pair.
LONWORKS Layout
LONWORKS networks can be configured in a variety of ways,
but the rules listed in Table 9 always apply. Fig. 13 and Fig.
14 depict two typical daisy chain LONWORKS network layouts;
one as a single bus segment that has 60 nodes or less, and
one showing two segments. Fig. 15 shows examples of free
topology bus layouts. The bus configuration is set up using
the Network Manager tool.
The communications bus, LONWORKS, is a 78-kilobit serial link
that uses transformer isolation and differential Manchester
encoding. Wire the LONWORKS using wires with specifications
set forth in Table 10. An FTT LONWORKS can be wired in
daisy chain, star, loop or any combination thereof as long as
the max. wire length requirements given in Step 2 are met.
Excel 10 W7754
Excel 5000
Excel 10 W7752
FCU Controller
FCU Controller
Honeywell
Honeywell
D-71101 Schönaich
Made in Germany
9
10 11 12
12
Fig. 13. LONWORKS wiring layout for one daisy-chain network segment
Excel 10 W7754
FCU Controller
Excel 10 W7752
FCU Controller
Excel 5000
Honeywell
Honeywell
D-71101 Schönaich
Made in Germany
9
10 11 12
12
max. 60 nodes
Excel 10 W7754
FCU Controller
Excel 10 W7752
FCU Controller
Honeywell
LonWorks
router
Honeywell
D-71101 Schönaich
Made in Germany
9
10 11 12
12
max. 60 nodes
Fig. 14. LONWORKS wiring layout for two daisy-chain network segments
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Fig. 15. Free topology LONWORKS layout examples
NOTE: See section "LONWORKS Termination" on page 23 for
additional details.
•
All field wiring must conform to local codes and
ordinances.
IMPORTANT
Notes on Communications Wiring:
•
•
See Table 10 for permitted wire sizes.
To minimize EMI noise, do not run Triac and/or
relay output wires in the same conduit as the
input wires or the LONWORKS communications
loop.
•
All field wiring must conform to local codes and
ordinances.
•
Do not use different wire types or gauges on the
same LONWORKS segment. The step change in
line impedance characteristics would cause
unpredictable reflections on the LONWORKS net-
work. When using different types is unavoidable,
use a Q7751A Router at the junction.
•
To comply with CE requirements, in the case of
devices having a voltage range of 50 to 1000 Vac
or 75 and 1500 Vdc which are not provided with a
supply cord and a plug or with other means for
disconnection from the supply having a contact
separation of at least 3 mm in all poles, the
means for disconnection must be incorporated in
the fixed wiring.
•
•
Do not use shielded cable for LONWORKS wiring
runs. The higher capacitance of the shielded
cable will cause degradation of communications
throughput. In noisy (high EMI) environments,
avoid wire runs parallel to noisy power cables, or
lines containing lighting dimmer switches, and
keep at least 3 in. (76 mm) of separation between
noisy lines and the LONWORKS cable.
Step 4. Prepare Wiring Diagrams
General Considerations
The purpose of this step is to assist the application engineer
in developing job drawings to meet job specifications.
NOTE: For field wiring, when two or more wires are to be
attached to the same connector block terminal, be
sure to twist them together. Deviation from this rule
can result in improper electrical contact.
Make sure that neither of the LONWORKS wires is
grounded.
Power Wiring
IMPORTANT
Table 10 lists wiring types, sizes, and length restrictions for
Excel 10 FCU Controller products.
Notes on Power Wiring:
19
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Table 10. Field wiring reference table (US part numbers shown)
recommended
min. wire size
AWG (mm2)
specification
or
requirement
wire
function
construction
vendor wire type
max. length ft (m)
Honeywell (US)
AK3791 (one twisted pair)
AK3792 (two twisted pairs)
(Europe: Belden
LONWORKS
(plenum)
14 to 20 AWG
twisted pair solid
conductor, non-shielded.
Level IV 140°F
(60°C) rating
See Step 2
(2.0 to 0.5 mm2)
9H2201504)
Honeywell (US)
LONWORKS
(non-
plenum)*
AK3781 (one twisted pair)
AK3782 (two twisted pairs)
(Europe: Belden
14 to 20 AWG
twisted pair solid
conductor, non-shielded.
Level IV 140°F
(60°C) rating
See Step 2
82.5 ft (25 m)
200 ft (60 m)
(2.0 to 0.5 mm2)
9D220150)
multi-conductor (usually
five-wire cable bundle); for
runs >100 ft (30 m),
twisted pair or shielded
cable is recommended.
input
wiring,
sensors,
contacts
14 to 20 AWG
140°F (60°C)
rating
Standard thermostat wire
(2.0 to 0.5 mm2)
14 to 20 AWG
Honeywell (US)
AK3702 (18 AWG)
AK3712 (16 AWG)
AK3754 (14 AWG)
or equivalent
output
(2.0 to 0.5 mm2) any pair non-shielded (use NEC Class 2
wiring,
actuators,
relays
20 AWG (0.5 mm2)
acceptable for
short runs
heavier wire for longer
runs).
140°F (60°C)
rating
Honeywell (US)
AK3754 (14 AWG)
(twisted pair)
Limited by line loss
effects on power
consumption.
(See Line Loss
subsection.)
any pair non-shielded (use NEC Class 2
power
wiring
14 to 20 AWG
heavier wire for longer
runs).
140°F (60°C)
rating
(2.0 to 0.5 mm2)
AK3909 (14 AWG) single
conductor or equivalent
NOTE: PVC wire must not be used where prohibited by local fire regulations.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Terminal Block Assignment and Wiring Example for the W7752 Controller
Table 11 illustrates terminal block assignments and wiring for
an example Excel 10 W7752 FCU Controller installation.
Table 12 lists wiring information for all possible actuator types.
Table 11. W7752 Controller: Overview of terminals and functions (by model)
model
terminal
#
function
D
E
F
G
J
1
2
GND serving terminals 2 and 3
3
3
3
3
3
a digital input, configurable (using the LNS plug-in) to read input e.g. from a
window contact, an occupancy sensor, etc.
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
a digital output, permanently configured to write output switching the wall module's
LED ON/OFF
3
4
an analog input, permanently configured to read input from a wall module's
temperature setpoint adjustment knob
an analog input, permanently configured to read input on whether the wall
module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,
or HIGH and whether the wall module's "occupancy override" button has been
pressed
5
6
3
3
3
3
3
an analog input, permanently configured to read input from a room temperature
sensor
3
3
3
3
3
7
GND serving terminals 4, 5, and 6
3
--
3
--
3
--
3
--
3
--
8
not used
9+10
11+12
13
receiving/sending data on the LONWORKS network
sending/receiving data on the LONWORKS network
a common terminal for terminals 14 and 15
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
14
a triac output, permanently configured to write output to OUT1, opening it
a triac output, permanently configured to write output to OUT1, opening it
a common terminal for terminals 17 and 18
15
16
17
a triac output, permanently configured to write output to OUT2, opening it
a triac output, permanently configured to write output to OUT2, closing it
a common terminal for terminals 20, 21, and 22
18
19
relay 1, permanently configured to write output to a three-speed fan, setting it to
LOW
20(1)
21(1)
22(1)
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
relay 2, permanently configured to write output to a three-speed fan, setting it to
MEDIUM
relay 3, permanently configured to write output to a three-speed fan, setting it to
HIGH
23
24
the "L" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively)
230 230 115 115 100
the "N" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively) 230 230 115 115 100
relay 4, permanently configured to write output to a hardwired electrical reheat
25+26
3
--
3
--
--
coil, switching it ON/OFF
(1) If all three relays (terminals 20, 21, and 22) are switched OFF, the three-speed fan will likewise be switched OFF.
Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different
functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the
outputs have been configured, the corresponding devices can be directly connected to them.
Table 12. Output assignments of Excel 10 W7752 FCU Controller for various actuator types
out 1 terminal
14
out 2 terminal
17
output type
13
15
close
—
stage 2
stage 2
16
18
close
—
stage 2
stage 2
floating
1-stage
2-stage
24 Vac
24 Vac
24 Vac
24 Vac
open
24 Vac
24 Vac
24 Vac
24 Vac
open
ON/OFF
stage 1
stage 1
stage 3
PWM
ON/OFF
stage 1
stage 1
stage 3
PWM
3-stage
PWM
thermal
24 Vac
24 Vac
—
—
24 Vac
24 Vac
—
—
ON/OFF
ON/OFF
21
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Terminal Block Assignment and Wiring Example for the W7754 Controller
Table 13 lists the terminals and their functions of the Excel 10 W7754 FCU Controller. Table 14 lists wiring information for all
possible actuator types.
Table 13. W7754 Controller: Overview of terminals and functions (by model)
model
terminal
#
function
K
L
M
N
P
1+2
3
receiving/sending data on the LONWORKS network; removable plug
3
3
3
3
3
a digital input, configurable (using the LNS plug-in) to read input e.g. from a
window contact, an occupancy sensor, etc.
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
an analog input, permanently configured to read input from a wall module's
temperature setpoint adjustment knob
4
5
an analog input, permanently configured to read input from a room temperature
sensor
6
7
8
GND serving terminals 4, 5, 9, 10, and 11
not used
3
--
3
3
--
3
3
--
3
3
--
3
3
--
3
GND serving terminal 3
a digital output, permanently configured to write output switching the wall module's
LED ON/OFF
9
3
3
3
3
3
an analog input, permanently configured to read input on whether the wall
module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,
or HIGH and whether the wall module's "occupancy override" button has been
pressed
10
3
3
3
3
3
a digital input, permanently configured to read input on whether a window contact
is "open" or "closed"
11 (1)
12
3
--
--
3
3
3
--
--
3
3
3
--
--
3
3
3
--
--
3
3
3
--
not used
relay 4, permanently configured to write output to a hardwired electrical reheat
coil, switching it ON/OFF
13+14
3
3
3
15
a common terminal for terminals 16, 17, and 18
relay 3, permanently configured to write output to a three-speed fan, setting it to
HIGH
16 (2)
relay 2, permanently configured to write output to a three-speed fan, setting it to
MEDIUM
17 (2)
18 (2)
3
3
3
3
3
3
3
3
3
3
relay 1, permanently configured to write output to a three-speed fan, setting it to
LOW
19
20
21
22
23
24
25
26
a triac output, permanently configured to write output to OUT1, closing it
a triac output, permanently configured to write output to OUT1, opening it
a triac output, permanently configured to write output to OUT2, closing it
a triac output, permanently configured to write output to OUT2, opening it
a common terminal for terminals 19 and 20
--
--
--
3
3
3
--
3
--
--
--
--
--
--
--
--
3
--
3
3
3
3
3
3
3
3
3
3
3
3
a common terminal for terminals 21 and 22
"N" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug
"L" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug
(1) This digital input can be enabled / disabled using the right DIP switch located on the top of the controller.
(2) If all three relays (terminals 16, 17, and 18) are switched OFF, the three-speed fan will likewise be switched OFF.
230 24 230 230 230
230 24 230 230 230
Additionally, the W7754K1001 features an extra socket (located to the left of the terminal blocks) containing a digital output
suitable for attachment to a solid-state relay employed for low-voltage PWM control in high-current electrical reheat applications.
Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different
functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the
outputs have been configured, the corresponding devices can be directly connected to them.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table 14. Output assignments of Excel 10 W7754 FCU Controller for various actuator types
OUT1
OUT2
output type
floating
stage
19
close
--
20
open
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
21
close
--
22
open
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
--
0
1
0
1
2
0
1
2
3
--
--
1-stage
--
--
OFF
OFF
ON
OFF
OFF
ON
ON
--
OFF
OFF
ON
OFF
OFF
ON
ON
--
2-stage
3-stage
PWM
thermal
PWM
ON/OFF
PWM
ON/OFF
--
--
LONWORKS Termination
One or two LONWORKS terminations are required, depending
on the given LonWorks bus layout.
NOTE: The Q7750A Zone Manager has an internal ter-
mination circuit, although jumpers are required at the
terminal block to connect it. See form number 95-
7509 for details.
Double termination is required only when the network is a
daisy-chain configuration and the total wire length is greater
than 1640 ft (500 m). The max. lengths described in Step 2
must be adhered to for either a daisy chain or free topology
LONWORKS layout. See Fig. 17 for connection details for a
doubly terminated bus. See Fig. 18 for connection details for
a singly terminated bus.
Fig. 17. Termination Module connections for a doubly-
terminated FTT network
Two different LONWORKS termination modules are available:
•
•
LONWORKS termination module, order no.:
LONWORKS connection / termination module (mountable
209541B
on DIN rails and in fuse boxes), order no.:
XAL-Term
3
4
1
5
shield
0
shield
6
4
3
LON
Fig. 18. Termination Module connections for a singly-
terminated FTT network
Termination
plug-in
jumper
FTT/LPT Bus
FTT/LPT Free
Park Position
removable screw-type
3-pole terminal block
L
O
N
L
O
N
Fig. 16. LONWORKS connection and termination module
23
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Step 5. Order Equipment
After compiling a bill of materials through completion of the previous application steps, refer to Table 15 for ordering information.
Contact Honeywell for information about controllers and Excel 10 wall modules with no logo.
Table 15. Excel 10 FCU Controller ordering information
Part Number
Product Description
Excel 10 FCU Controllers
Comments
230 Vac, FTT LONWORKS version w/ relay for
electrical reheat applications
230 Vac, FTT LONWORKS version w/o relay
for electrical reheat applications
115 Vac, FTT LONWORKS version version w/
relay for electrical reheat applications
115 Vac, FTT LONWORKS version w/o relay
for electrical reheat applications
100 Vac, FTT LONWORKS version w/o relay
for electrical reheat applications
W7752D2007
W7752E2004
W7752F2002
W7752G2000
W7752J2003
230 Vac, FTT LONWORKS version w/o releay
for electrical reheat applications; digital out-
put for low-voltage PWM control of solid-
state relay for high-current electric reheat
applications; one triac
W7754K1001
24 Vac, FTT LONWORKS version w/o releay
for electrical reheat applications; two triacs
230 Vac, FTT LONWORKS version w/o releay
for electrical reheat applications
230 Vac, FTT LONWORKS version w/o releay
for electrical reheat applications; two triacs
230 Vac, FTT LONWORKS version w/ releay
for electrical reheat applications; four triacs
Excel 10 Wall Modules
W7754L1009
W7754M1007
W7754N1004
W7754P1000
T7460, T7560
See Excel 10 wall module literature for details.
Return air
Excel 10 Sensors
C7068A1007 (Europe)
Air Temperature Sensor
Echelon-Based Components and Parts
209541B
FTT Termination Module
Two required per LONWORKS segment.
205979A (US only)
SLTA Connector Cable for LONWORKS bus
Serial interface to wall module or controller.
Cabling
Serial Interface Cable, male DB-9 to female Obtain locally from any computer hardware vendor.
DB-9 or female DB-25.
—
Honeywell (US)
AK3791 (one twisted pair) LONWORKS (plenum): 14 to 20 AWG (2.0 to
AK3792 (two twisted pairs) 0.5 mm2) twisted pair solid conductor, non-
Level IV 140°F (60°C) rating
Belden (Europe)
9H2201504
shielded.
Honeywell (US)
AK3781 (one twisted pair) LONWORKS (non-plenum): 14 to 20 AWG (2.0
AK3782 (two twisted pairs) to 0.5 mm2) twisted pair solid conductor, non- Level IV 140°F (60°C) rating
Belden (Europe)
9D220150
shielded.
Inputs: 18 AWG (1.0 mm2) five wire cable
bundle.
Honeywell (US) AK3725
Standard thermostat wire
NEC Class 2 140°F (60°C) rating
Non-plenum
Honeywell (US) AK3752 Outputs/Power: 14 to 18 AWG (2.0 to
(typical or equivalent)
Honeywell (US) AK3702
(typical or equivalent)
Honeywell (US) AK3712
(typical or equivalent)
Honeywell (US) AK3754
(typical or equivalent)
1.0 mm2).
18 AWG (1.0 mm2) twisted pair.
16 AWG (1.5 mm2) twisted pair.
14 AWG (2.0 mm2) two conductor.
Non-plenum
Non-plenum
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Step 6. Configure Controllers
General
This section will provide details on the configuration options
for Excel 10 FCU Controllers. See Appendix C for reference
information.
1. Output
2. Input
3. Equipment Control
4. Fan
5. Switching Levels
6. Zone Options
7. Miscellaneous
8. PID
Using Plug-Ins
9. Wiring (information only, no configuring).
The configuration process is primarily performed in a series of
screens seen as file tabs under the menu option Application
Selection and is easily followed using the tables included in
this section. There are 9 file tabs:
The specific parameters to be configured in each of these four
categories are tabulated in the following subsections. For a
complete list of all Excel 10 FCU Controller NV's, see
Appendix C.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Output
The available options for output configurations with the default values shown are listed in Table 16. See section "Configurations"
on page 12 for more information about parameters.
Table 16. FCU Controller output configuration options and default configurations
default configuration
W7752
default configuration
W7754
function
model
configuration options
D,F
E,G,J
K4
L
M
N
P
2-pipe (1 valve)
4-pipe (2 valves)
system type
4-pipe
4-pipe
4-pipe
2-pipe
4-pipe
no fan
1-speed fan
2-speed fan
3-speed fan
fan type
3-speed
reheat
3-speed
not used
heating
3-speed
reheat
network control (free use)
not used
relay 4
(reheat relay)
not used
reheat
not used
cooling
heating
heat/cool changeover
output 1
(triac 1 and 2)3
control1
heating
heating
floating
cooling
floating
floating
floating-mid2
1-stage
2-stage
3-stage
PWM
output 1
ther-
mal
ther-
mal
(triac 1 and 2)3
type
floating
cooling
floating
floating
cooling
floating
PWM
floating
thermal
not used
cooling
heating
heat/cool changeover
output 2
(triac 3 and 4)3
control1
floating
floating-mid2
1-stage
2-stage
3-stage
PWM
output 2
ther-
mal
(triac 3 and 4)3
type
thermal
floating
thermal
Notes:
1. The output mode settings apply only to a 4-pipe system. In a 2-pipe system, output 1 will always operate in the changeover
mode.
2. The floating-mid option is for changeover applications, only, and uses only one of the two outputs.
3. The operation of the triacs based upon the output type is given in Table 12 on page 21 and in Table 14 on page 23.
4. W7754K1001 is equipped with a low-voltage digital output suitable for connection to a solid-state relay employed for low-
voltage PWM control in high-current electric reheat applications; this digital output is activated if output 1 type is set to either
"PWM" or "thermal".
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Input
The available options for input configurations with the default values shown are listed in Table 17. See sections "Control
Provided" and "Configurations" above for more information on parameters.
Table 17. FCU Controller input configuration options
function
configuration options
default
no sensor
sensor
space temperature sensor
sensor
none - bypass button is disabled.
bypass unoccupied - bypass button overrides current mode to occupied
for configurable bypass time for button press of 1.1 to 4 seconds (single
press with T7560) or permanently overrides to unoccupied for button
press of 4.1 to 7 seconds (more than 5 seconds with T7560).
bypass button
bypass unoccupied
LED override
bypass - bypass button only overrides current mode to occupied and to
cancel the override again.
LED override - shows override from bypass button or from network.
LED occupancy - shows effective occupancy mode.
LED/LCD
LCD display - only used with T7560 Wall Modules; occupancy mode is
represented by different symbols.
no switch
fan speed switch
(or respective T7560
setting)
3-position switch
4-position switch
5-position switch
5-position switch
relative
no knob
relative
absolute middle
setpoint knob
limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86
°F) or DDF (relative setpoint, -9 to 9 DDF)
-9 DDF (53.6 °F for
absolute setpoint)
min. limit setpoint pot
(limit for setpoint knob in either degrees C (absolute setpoint, 12 to
30°C) or K (relative setpoint, -5 to 5 K))
(-5 K (12 °C for
absolute setpoint))
limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86
°F) or DDF (relative setpoint, -9 to 9 DDF)
9 DDF (86 °F for
absolute setpoint)
max. limit septoint pot
(limit for setpoint knob in either degrees C (absolute setpoint, 12 to 30
°C) or K (relative setpoint, -5 to 5 K))
(5 K (30 °C for
absolute setpoint))
not used
window closed
occupied sensor
cool changeover
window open
unoccupied sensor
heat changeover
movement
digital input
not used
no movement
Notes:
1. The temperature sensor option no sensor requires that either the FCU Controller be configured as a slave unit receiving
heating and cooling control levels from the master unit via the network, or that it receive temperature information over the
network from another device.
2. The digital input option to be selected is the condition in which the input will be high (switch contact closed).
3. Furthermore, all W7754 controllers are equipped with an additional digital output which is permanently assigned to the
function window contact. This digital input is not visible in the configuration with the plug-in. This digital input can be enabled /
disabled using the right DIP switch located on the top of the controller
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Equipment Control
The available options for equipment control configurations with the default values shown are listed in the following table. See
section "Configurations" on page 12 for more information about parameters.
Table 18. FCU Controller equipment control configuration options
function
configuration options
enabled / disabled
enabled / disabled
direct / reverse
default
disabled
disabled
direct
output 1 fan interlock
output 2 fan interlock
output 1 valve direction1
output 2 valve direction1
output 1 min. stage OFF time
output 2 min. stage OFF time
direct / reverse
direct
0 to 600 seconds
0 to 600 seconds
90 s
90 s
floating - valve run time (20 to 600 seconds)
PWM - cycle time (20 to 600 seconds)
1, 2, and 3-stage – min. ON time (0 to 1200 seconds)
output 1 valve run time/PWM
period/min. stage ON time
150 s
150 s
floating - valve run time (20 to 600 seconds)
PWM - cycle time (20 to 600 seconds)
1, 2, and 3-stage – min. ON time (0 to 1200 seconds)
output 2 valve run time/PWM
period/min. stage ON time
reheat switching level
reheat hysteresis
PWM zero position2
0 to 100%
0 to 100%
0 to 100%
0 to 100%
100%
5%
0%
PWM full position2
100%
Notes:
1. Valve action settings apply to floating, PWM, or thermal types.
2. Settings apply to both actuators if both are PWM.
Fan
Available options for fan control are listed in the following table. See section "Configurations" on page 12 for more information
about parameters.
Table 19. FCU Controller fan configuration options
function
configuration options
default
continuous during occupied mode;
automatic, based on control algorithm
fan occupancy mode
automatic
fan min. ON time1
fan min. OFF time1
fan run-up time1
0 to 1200 seconds
0
0
0
0
0 to 1200 seconds
(with fan interlock only) 0 to 600 seconds
(with fan interlock only) 0 to 600 seconds
fan overrun time1
Notes:
1. Fan run time options apply to all fan speeds.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Switching Levels
See section "Configurations" on page 12 for more information about parameters.
Table 20. FCU Controller switching levels configuration options
configuration options
function
default
5%
cooling stage 1 switching level
heating stage 1 switching level
cooling stage 2 switching level
heating stage 2 switching level
cooling stage 3 switching level
heating stage 3 switching level
cooling hysteresis
0 to 100%
0 to 100%
0 to 100%
0 to 100%
0 to 100%
0 to 100%
0 to 100%,
0 to 100%
5%
50%
50%
75%
75%
10%
10%
heating hysteresis
Notes:
1. Stage switching levels and hysteresis are used for fan control as well as multi-stage heating/cooling outputs
control.
Zone Options
The Zone configuration options are listed in the following table. See section "Configurations" on page 12 for more information
about parameters.
Table 21. FCU Controller zone configuration options
function
configuration options
50 to 95°F (10 to 35°C)
50 to 95°F (10 to 35°C)
50 to 95°F (10 to 35°C)
50 to 95°F (10 to 35°C)
50 to 95°F (10 to 35°C)
50 to 95°F (10 to 35°C)
default
cooling occupied setpoint
heating occupied setpoint
cooling standby setpoint
heating standby setpoint
cooling unoccupied setpoint
73.4°F (23°C)
69.8°F (21°C)
77°F (25°C)
66.2°F (19°C)
82.4°F (28°C)
60.8°F (16°C)
heating unoccupied setpoint
Notes:
1. Ensure that unoccupied heating<occupied heating<occupied cooling<unoccupied cooling and
standby heating<standby cooling.
Miscellaneous
The options available in the Miscellaneous tab are listed in the following table. See section "Configurations" on page 12 for more
information about parameters.
Table 22. FCU Controller miscellaneous configuration options
function
configuration options
default
Bypass time
0 to 1080 minutes
180 minutes
last wins - the last command from either the wall module or from the
network has priority.
Override priority
last wins
network wins - a network command always has priority until canceled.
0 to 18 DDF (0 to 10 K)
Demand limit control bump
3.6 DDF (2 K)
0
Cool rec ramp
(cooling optimum start gradient)
-36 DDF/hour to 0 (-20 K/hour to 0)
0 to 36 DDF/hour (0 to 20 K/hour)
Heat rec ramp
(heating optimum start gradient)
0
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
PID
The options for configuring PID parameters with defaults are shown in the following table. See section "Configurations" on page
12 for more information about parameters.
Table 23. FCU Controller PID configuration options
function
configuration options
default
P control: 2.25 to 180 DDF (1.25 to 100 K) (0 = disable)
PI control: 3.6 to 180 DDF (2 to 100 K) (0 = disable)
P control: 2.25 to 180 DDF (1.25 to 100 K) (0 = disable)
PI control: 3.6 to 180 DDF (2 to 100 K) (0 = disable)
10 to 3200 seconds (0 = disable)
cooling proportional gain1
36 DDF (20 K)
heating proportional gain1
36 DDF (20 K)
cooling reset time
250 s
heating reset time
10 to 3200 seconds (0 = disable)
250 s
cooling derivative time
heating derivative time
cooling boost temperature
1 to 3200 seconds (0 = disable)
0
1 to 3200 seconds (0 = disable)
0
0.9 to 18 DDF (0.5 to 10 K) (0 = disable)
0.9 to 18 DDF (0.5 to 10 K) (0 = disable)
1.8 DDF (1 K)
1.8 DDF (1 K)
heating boost temperature
Notes:
1. Prior to version 1.0.3, the minimum proportional gain was 7.2 DDF (4 K) for all control algorithms.
Commissioning
Commissioning is the process of writing the LONWORKS
Alarms
®
When an Excel 10 FCU Controller has an alarm condition, it
reports it to the central node on the LonWorks network via the
variable nvoAlarm. See Table 24. The information contained
in nvoAlarm is:
addresses, the binding information and the configuration to
the Excel 10 Controller. Any LNS tool can be used to perform
these activities, as described in Appendix B.
• Subnet Number: The LonWorks subnet that contains
the Excel 10 FCU Controller node that has the alarm
condition.
ID Number
Each Excel 10 FCU Controller is shipped with an internal
Identification Number from the factory called the Neuron ID®.
The ID number can either be manually entered or it can be
received from the network. Pressing the bypass push-button
on the Excel 10 wall module for an FCU Controller when it is
in Service Mode causes it to broadcast a service message
containing its Neuron ID number. This ID number is on a
removable sticker on the controller housing and can be typed
in manually.
• Node Number: The Excel 10 FCU Controller node that
has the alarm condition.
• Alarm Type: The specific alarm being issued and return
to normal. An Excel 10 FCU Controller can provide the
alarm types listed in Table 24.
All current alarms are contained in a variable called
nvoAlarmStatus which is composed of three bytes
(nvoAlarmStatus.alarm_bit[n] with n = 0 through 2) with a bit
corresponding to each of the alarms listed in Table 24. The
coding is ordered in that the least significant bit of
nvoAlarmStatus.alarm_bit[0] corresponding to alarm type 1,
the most significant bit corresponding to alarm type 8, the
least significant bit of nvoAlarmStatus.alarm_bit[1]
corresponding to alarm type 9, and so on. Even alarms that
are suppressed in nvoAlarm (see below) are contained in
nvoAlarmStatus.
Step 7. Troubleshooting
Troubleshooting Excel 10 FCU Controllers and Wall
Modules
In addition to the following information, refer to the various
Checkout and Test manuals for these products. See
Applicable Literature section for form numbers.
Also, the Excel 10 FCU Controller variables,
nvoAlarmLog.type[n], where n is 0 through 4, that store the
last five alarms to occur in the controller, are available.
Certain alarm conditions are suppressed conditionally as
follows:
If an input network variable with failure detect is bound to the
same node as nvoAlarm, then nvoAlarm and nvoAlarmLog do
not report the related FCU Controller variable receive failure
error and its associated return to normal. Suppression only
occurs when the nvoAlarm is bound to only one node using
LonWorks subnet/node addressing and only after the input
variable has actually received a network variable from the
node since the latest application restart (or power-up
condition
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Table 24. Excel 10 FCU Controller alarms.
alarm type
number
Name of alarm or alarm bit
meaning of alarm code or alarm bit
No Alarm/Return to Normal:
RETURN_TO_NORMAL
128
255
0
Return to no error after being in an error condition. This code is added
numerically to another alarm code to indicate that the error condition has
returned to normal.
ALARM_NOTIFY_DISABLED
The alarm reporting has been turned OFF by the nviManualMode
=SUPPRESS_ALARMS. No more alarms are reported until
nviManualMode turns ON alarm reporting or upon application restart.
ALM_NO_ALARM
FCU Alarms:
No errors since last application restart; initial condition
ALM_NODE_OFF
1
2
The control algorithm has stopped due to controller disabled, or in test
mode, or other conditions
ALM_FROST
The space temperature is below the frost alarm limit. The alarm condition
remains until the temperature exceeds the alarm limit plus hysteresis.
ALM_INVALID_SETPNT
ALM_TEMP_SENSOR_FAIL
ALM_SETPNT_KNOB_FAIL
ALM_FAN_SPEED_SW_FAIL
ALM_FAN_FAILURE
3
4
5
6
7
One of the setpoints is not in the valid range
Temperature sensor failed
Remote setpoint potentiometer failed
Fan speed switch failed
Fan is commanded to be ON, but the air flow detector input does not
detect the fan running.
ALM_COMFAIL_SPACE_TEMP
ALM_COMFAIL_HVACMODE
ALM_COMFAIL_SETPTOFFS
ALM_COMFAIL_SCHEDOCC
ALM_COMFAIL_DLC
8
nviSpaceTemp is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
9
nviApplicMode is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
10
11
12
13
14
15
16
17
18
19
nviSetPtOffset is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviTodEvent is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviDlcShed is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
ALM_COMFAIL_TEMPRESET
ALM_COMFAIL_ODTEMP
ALM_COMFAIL_OCCSENSOR
ALM_COMFAIL_WINDOW
ALM_COMFAIL_MANHEAT
ALM_COMFAIL_MANCOOL
ALM_HW_SW_MISMATCH
nviTempReset is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviOdTemp is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviSensorOcc is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviWindow is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviManHeat is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
nviManCool is bound and has failed in receiving an update within its
specified FAILURE_DETECT_TIME
The software is not compatible with the hardware configuration specified
by the hardware configuration resistor value. Compatibility is checked
only once after application restart.
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Broadcasting the Service Message
Manual Mode
The Service Message allows a device on the LonWorks
network to be positively identified. The Service Message
contains the controller Neuron ID number and, therefore, can
be used to confirm the physical location of a particular Excel
10 FCU Controller in a building.
The FCU Controller can be put into a manual mode which
allows manual setting of outputs for system checkout. The
variable nviManualMode must be set to Mode_Manual using
the LNS tool. Triac outputs can be set to any combination of
ON/OFF or can be set to a test position based upon the
configured valve runtime/cycle time. The fan relays and
reheat relay (W7752D, F and W7754P1000, only) can also be
commanded ON/OFF in any combination. The override LED
can be commanded ON/OFF in this mode also.
When an Assign Neuron ID command is issued from the LNS
tool, the node goes into the SERVICE_MESSAGE mode for
one minute. In the SERVICE_MESSAGE mode, pressing the
occupancy override button on the remote Excel 10 wall
module causes the Service Message to be broadcast on the
network. All other functions are normal in the
SERVICE_MESSAGE mode. If an FCU Controller does not
have a bypass button connected, it can still broadcast the
Service Message on the network by temporarily shorting the
controller Fan Speed/Bypass input terminal to the AGND
terminal on the controller (terminals 5 and 7) with the
controller in SERVICE_MESSAGE mode.
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APPENDIX A: USING AN LNS TOOL TO COMMISSION A FAN COIL UNIT
the actual Measured Value. When a value is typed in
and Calibrate is clicked, the offset value is
Temperature Sensor Calibration
automatically calculated, displayed, and written to the
Excel 10 FCU Controller.
The temperature sensor in the Excel 10 wall modules can be
calibrated to correct for sensor inaccuracies, wire resistance,
etc. This allows the Excel 10 FCU Controller to sense the
space temperature with a high degree of accuracy.
Procedure
Select the controller being worked on with the LNS tool.
From within the LNS tool, with the desired project loaded and
the SLTA (Q7752A) connected to the LonWorks network,
perform the following procedure:
1. Select a controller symbol from a network diagram.
2. Click on Calibrate from the Controller menu. Once the
LNS tool logs on to the controller, the Room
Fig. 19. Calibration dialog box
Temperature Calibration dialog box appears.
4. Click on Close after completing adjustments.
3. The box displays the Current Value of the sensor and
the current Offset; it also contains a field for entering
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APPENDIX B: CONFIGURING FOR MASTER/SLAVE OPERATION
More than one Excel 10 FCU Controller may be used to
control the temperature of a room. In this situation one
controller must be identified as the master unit which will
perform the temperature control algorithm. The other FCU
Controllers in the room are designated as slave units, and
their control algorithms are disabled. The slave units receive
heating, cooling, and fan output information from the master
controller via network variables sent across the LonWorks
network. There can be a maximum of one wall module active
in the room, and it must be wired directly to the master
controller. If a slave controller has a wall module connected to
it, the wall module will be ignored.
If a fan is used in the slave units, all fan control settings must
be the same as in the master controller.
All heating and cooling stage switching levels should be
identical to those of the master controller.
Zone Control Options
All zone temperature control options including PID settings
and miscellaneous settings are used only by the master
controller and are ignored in the slave units.
Network Variable Binding
Configuration of the master controller is the same as for any
controller operating alone in a room. Configuration of the
slave controllers must follow the rules described in this
section. The following sections correspond to the screens in
the LNS tool used for configuring Excel 10 FCU Controllers.
An additional section discusses binding of network variables
to support master/slave configurations.
In a master/slave configuration, the control algorithm is
executed in the master controller only. Heating and cooling
output as calculated by the control algorithm is then sent via
the network to the slave controllers. The master controller
output variables nvoHeatOutput and nvoCoolOutput must be
bound to the slave input variables nviManHeat and
nviManCool respectively.
Output Configuration Options
For a master/slave system using heat/cool changeover, the
master controller output variable must be bound to the slave
controllers’ input NV nviApplicMode unless a changeover
contact is connected to the slave devices. The binding of
these two NVs is also required in applications where heat/cool
energy is not always available.
Slave devices must have their outputs configured identically
with the master controller. The same system type and
actuator types must be used. Valve run-times, cycle times,
and PWM zero and full position configuration options must be
the same as well. If the master controller has a reheat output,
the slave units must have one; and both must be configured
the same. Fan control in the slave units is via network
command from the master unit.
The T7780 wall module must be connected to the master
controller. The master controller output variable nvoFanSpeed
must be bound to the slave controllers’ input variable
nviFanSpeedCmd
IMPORTANT
The fan minimum on-time must be configured to zero
in the slave controllers so that the fans in both
master and slave units switch ON at the same time.
IMPORTANT
The OFF position of the fan speed switch on the wall
module turns OFF heating and cooling control
functions as well as the fan, so the network variable
binding described above for fan speed must still be
performed as described.
Input Configuration Options
Slave controllers may have wall modules connected to them,
but they must be deactivated while the controllers are
operating as slave units. They must be configured for no
temperature sensor and no fan speed switch. The digital
input may be used on the slave units for window open/closed
or air flow (fan fail) detection and must be configured as such.
In the case of window sensing, the window status network
variable must be mapped to the master controller as the slave
controller does not execute the control algorithm.
For applications with reheat, the master controller output
variable nvoReheat must be bound to the slaves’ input
variable nviReheatRelay.
Equipment Control Options
Valve action and fan interlock settings must be the same as
for the master controller. Output staging hysteresis, minimum
stage OFF times, and reheat switching and hysteresis should
be the same as in the master controller.
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APPENDIX C: LON INTERFACE
The tables are divided as follows:
Table C2—Configuration variables
Table C3—Input variables
Table C4—Output variables
Table C5—Unused variables
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciApplVer
application_type
version_no
time[0]
UBYTE, 0 to 255
UBYTE, 0 to 255
UBYTE, 0 to 255
0
0
0
This configuration variable specifies the current application number of
the Excel 10 application.
nciApplVer
nciApplVer
This configuration variable specifies the version number of the Excel
10 application.
The time stamp of the last change to the Excel 10 application con-
figuration. Time meets the ANSI C time stamp requirement specifying
the number of seconds elapsed since midnight (0:00:00), January 1,
1970. It is represented in the Intel Format and is four bytes in length.
nciApplVer
time[1]
time[2]
time[3]
ch[0-17]
UBYTE, 0 to 255
UBYTE, 0 to 255
UBYTE, 0 to 255
UBYTE, 0 to 255
0
0
0
0
See above.
See above.
See above.
nciApplVer
nciApplVer
nciDeviceName
This configuration variable specifies the name of each device. This is
an ASCII string with the a size of 18 characters. A name with all NULLs
means that the device has not been configured.
nciLocation
SNVT_str_asc
0x00
This configuration variable is used to provide more descriptive physical
loacation information than can be provided by the Neuron chip's 6 byte
location string.
nciMaxSendTime
SNVT_temp_p
0 to 6553 seconds
0 s from factory
This configuration variable specifies the maximum time that expires
before the node object automatically transmits nvoStatus. This pro-
vides a heartbeat output that can be used by the destination objects to
ensure that the node is still healthy. The heartbeat output may be
disabled by setting nciMaxSendTime = 0.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciRcvHrtBt
SNVT_time_sec
0 to 6553 seconds
0 = Disabled
0 s from factory
This configuration variable specifies the maximum time that elapses
after the last update to
•
•
•
•
•
•
•
•
•
nviApplicMode
nviDlcShed
nviManCool
nviManHeat
nviSensorOcc
nviSetPtOffset
nviSpaceTemp
nviTodEvent
nviWindow
before these NV inputs adopt their default values. Setting nciRcvHrtBt
= 0 means, that the assigned NV input does not wait for an periodic
update, and that it will never revert to any default when not receiving an
update. If nviSpaceTemp and nviApplicMode are not received at
regular intervals that are less than the heartbeat time, the controller will
assume that there is a communication failure and revert to the
"occupied" mode.
nciSndHrtBt
SNVT_time_sec
0 to 6553 seconds
0 = Disabled
0 s from factory
This configuration variable specifies the maximum time that expires
before the object automatically transmits the current value of
•
•
•
•
•
•
•
•
•
•
•
•
•
nvoActiveSetPt
nvoAlarm
nvoApplicMode
nvoCoolOutput
nvoFanSpeed
nvoFcuStatus
nvoHeatOutpu
nvoReheatt
nvoSensorOcc
nvoSpaceTemp
nvoTerminalLoad
nvoUnitStatus
nvoWindow
This provides a heartbeat output that can be used by the destination
objects to ensure that the node is still healthy. The heartbeat output
may be disabled by setting nciSndHrtBt = 0.
nciCntrlSettings
fan_auto_mode
CONTINUOUS
AUTO_MODE
0
1
AUTO_MODE
This configuration variable specifies the fan operation during the
"occupied" mode. CONTINUOUS will cause the fan to run even in the
zero energy band.
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Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciCntrlSettings
fan_run_up_time
SNVT_time_sec
0 to 600 seconds
0
0
0
This configuration variable specifies the time the fan runs before the
outputs are switched ON. It is typically used for electric heat outputs
with fan interlock (see nciFcuConfig.fan_interlock_0 and _1). The
interlock must be set.
nciCntrlSettings
fan_overrun_time
SNVT_time_sec
0 to 600 seconds
0
This configuration variable specifies the time the fan still runs after the
control algorithm has turned OFF the cooling/heating outputs. It is
typically used for electric heat with fan interlock (see
nciFcuConfig.fan_interlock_0 and _1). The interlock must be set. In
case of smoke purge the overrun-time will be ignored.
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
nciCntrlSettings
switch_level_cool[0]
switch_level_cool[1]
switch_level_cool[2]
switch_level_heat[0]
switch_level_heat[1]
switch_level_heat[2]
staging_hysteresis[0]
staging_hysteresis[1]
reheat_switch_level
SNVT_lev_percent
0 to 100%, 0 = Disable
5%
This is the switching level to turn ON stage 1 of the cooling equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%, 0 = Disable
50%
75%
5%
This is the switching level to turn ON stage 2 of the cooling equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%, 0 = Disable
This is the switching level to turn ON stage 3 of the cooling equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%, 0 = Disable
This is the switching level to turn ON stage 1 of the heating equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%, 0 = Disable
50%
75%
10%
10%
100%
This is the switching level to turn ON stage 2 of the heating equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%, 0 = Disable
This is the switching level to turn ON stage 3 of the heating equipment
(if configured as multistage).
SNVT_lev_percent
0 to 100%
This configuration variable applies only to cool outputs configured as
multistage outputs and specifies the hysteresis between switching the
cool stages ON and OFF.
SNVT_lev_percent
0 to 100%
This configuration variable applies only to heat outputs configured as
multistage outputs and specifies the hysteresis between switching the
heat stages ON and OFF.
SNVT_lev_percent
0 to 100%
This configuration variable specifies the switch-over control output level
for the reheat output.
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Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciCntrlSettings
reheat_hysteresis
SNVT_lev_percent
0 to 100%
5%
0
This configuration variable specifies the hysteresis between switching
the reheat output ON and OFF.
nciCntrlSettings
nciCntrlSettings
nciEnergyManag
nciEnergyManag
nciEnergyManag
nciFcuConfig
fan_min_on_time
fan_min_off_time
si_dlc_setpt_bump
si_optstart_grad[0]
si_optstart_grad[1]
room_temp_sensor
fan_speed_switch
SNVT_time_sec
0 to 1200 seconds
This configuration variable specifies the minimum time the fan has to
run when commanded ON by the control algorithm. This time will be
ignored in case of smoke purge. The min_on_time starts as soon as
the fan is switched on.
SNVT_time_sec
0 to 1200 seconds
0
This configuration variable specifies the minimum time the fan has to
remain OFF when commanded OFF by the control algorithm. This time
will be ignored in case of smoke purge. The min_on_time starts as
soon as the fan is switched OFF.
SNVT_temp_p
0 to 18 DDF (0 to 10 K)
3.6 DDF (2 K)
This configuration variable is used to shift the temperature setpoint
during demand limit control load shedding. When nviDlcShed is
different from zero, the current occupancy setpoint will be decreased
by this value for heating and increased for cooling.
SNVT_temp_p
-36 to 0 DDF/hr (-20 to 0
K/hr)
0 DDF/hr (0 K/hr)
0 DDF/hr (0 K/hr)
This configuration variable specifies the cooling gradient used by the
optimum start function to calculate the optimum time for starting to
decrease the effective setpoint smoothly from the unoccupied or
standby cooling setpoint to the occupied cooling setpoint.
SNVT_temp_p
0 to 36 DDF/hr (0 to 20 K/hr)
This configuration variable specifies the heating gradient used to
determine the optimum time to start increasing the current effective
setpoint smoothly to the occupied setpoint at the beginning of
scheduled occupancy.
BYTE
NTC_NON_LINEARIZE
D
This configuration variable specifies whether a direct wired room
temperature sensor is connected to the node or a room temperature
value from the network is used.
NO_TEMP_SENSOR
NTC_NON_LINEARIZED
0
2
nciFcuConfig
BYTE
NO_SWITCH
THREE_POSITION
FOUR_POSITION
FIVE_POSITION
FIVE_POSITION
This configuration variable specifies the type of fan speed switch on
the wall module.
0
1
2
3
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Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciFcuConfig
DI1_config
BYTE
DI_NOT_USED
This configuration variable specifies the digital input function and type
of switch. The option to be selected is the one which is the condition for
a closed switch contact (e.g., normally-closed window switch contact =
DI_WINDOW_CLOSED, normally-open window switch contact =
DI_WINDOW_OPEN).
DI_WINDOW_CLOSED
DI_OCCUPIED_SENSOR
DI_AIR_FLOW
DI_CHANGEOVER_COOL
DI_WINDOW_OPEN
DI_UNOCCUPIED_SENS
DI_NO_AIR_FLOW
DI_CHANGEOVER_HEAT
DI_MOVEMENT
0
1
2
3
4
5
6
7
DI_MOVEMENT and DI_NO_MOVEMENT are supported starting with
FCU2 version 1.0.3. These configuration settings cause the controller
to retain the occupied state for 15 minutes after the last movement is
detected.
8
DI_NO_MOVEMENT
DI_NOT_USED
9
255
nciFcuConfig
nciFcuConfig
nciFcuConfig
fan_config
BYTE
NO_FAN
ONE_SPEED
TWO_SPEED
THREE_SPEED
THREE_SPEED
OUTP_HEATING
OUTP_COOLING
This configuration variable specifies the type of fan connected to the
controller.
0
1
2
3
output_mode[0]
output_mode[1]
BYTE
This configuration variable specifies the operating mode of the output
1.
OUTP_COOLING
OUTP_HEATING
OUTP_CHANGEOVER
OUTP_NOT_USED
0
1
2
255
BYTE
This configuration variable specifies the operating mode of the output
2. This setting is ignored for nciNumValve = TWO_PIPE.
OUTP_COOLING
OUTP_HEATING
OUTP_CHANGEOVER
OUTP_NOT_USED
0
1
2
255
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Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciFcuConfig
output_type[0]
BYTE
FLOATING
This configuration variable specifies the output type to drive the
connected actuator for the output 1:
FLOATING/FLOATING_MID - This setting considers valve_reverse[]
and cycle_time[]. Synchronization is performed at every restart and at
least once per day.
FLOATING
ONE_STAGE
TWO_STAGE
THREE_STAGE
PWM
0
1
2
3
4
5
6
ONE_STAGE - Triac 2 is not used.
THERMAL
FLOATING_MID
TWO_STAGE/THREE_STAGE - Triac 1 and 2 used (triac 1 and 2 both
ON for stage 3). When configured as multistage, cycle_time and
min_stage_off_time are considered.
PWM/THERMAL - Triac 2 is not used. Triac 1 operates as a pulse-
width modulated output, and the cycle time must be specified in
cycle_time[]. For PWM outputs, PwmZeroPosn and PwmFullPosn must
also be specified.
nciFcuConfig
output_type[1]
BYTE
FLOATING
This configuration variable specifies the output type to drive the
connected actuator for the output 2 (see above).
FLOATING
ONE_STAGE
TWO_STAGE
THREE_STAGE
PWM
0
1
2
3
4
5
6
THERMAL
FLOATING_MID
nciFcuConfig
nciFcuConfig
nciFcuConfig
nciFcuConfig
valve_reverse_0
valve_reverse_1
fan_interlock_0
fan_interlock_1
Bit
DIRECT
DIRECT
NO
This configuration variable applies to only those outputs that have been
configured as FLOATING, PWM, or THERMAL and specifies the
direct/reverse operation of output 1.
DIRECT
REVERSE
0
1
Bit
This configuration variable applies only to those outputs that have been
configured as FLOATING, PWM, or THERMAL and specifies the
direct/reverse operation of output 2.
DIRECT
REVERSE
0
1
Bit
NO
YES
This configuration variable configures an interlock between fan and
output 1 to provide equipment protection for electric heat or
compressor. fan_interlock_0=1 enables interlock, which guarantees
output1 to be driven only when the fan is running.
0
1
Bit
NO
YES
NO
This configuration variable configures an interlock between fan and
output 2 to provide equipment protection for electric heat or
compressor. fan_interlock_1=1 enables interlock, which guarantees
output2 to be driven only when the fan is running.
0
1
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciFcuConfig
cycle_time[0]
SNVT_time_sec
150 s for floating
This configuration variable specifies for the output 1 configured as
0 to 1200s for stage output
0 to 600s for floating output
20 to 600s for PWM output
•
FLOATING: the runtime of the valve (time to run from fully closed to
fully open)
PWM: the cycle time
ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON
time before switching to the next stage.
•
•
nciFcuConfig
cycle_time[1]
SNVT_time_sec
150 s for floating
This configuration variable specifies for the output 2 configured as
0 to 1200s for stage output
0 to 600s for floating output
20 to 600s for PWM output
•
FLOATING: the runtime of the valve (time to run from fully closed to
fully open)
PWM: the cycle time
ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON
time before switching to the next stage.
•
•
nciFcuConfig
nciFcuConfig
nciFcuConfig
min_stage_off_time[0]
min_stage_off_time[1]
reheat_config
SNVT_time_sec
0 to 600 seconds
90 s
This configuration variable is used only for ONE_STAGE,
TWO_STAGE, and THREE_STAGE output 1 and specifies the mini-
mum OFF time before switching to the next stage.
SNVT_time_sec
0 to 600 seconds
90 s
This configuration variable is used only for ONE_STAGE,
TWO_STAGE, and THREE_STAGE output 2 and specifies the mini-
mum OFF time before switching to the next stage
BYTE
REHEAT
FREE_USE
REL_NOT_USED
REHEAT
This configuration variable specifies the usage of the reheat relay.
FREE_USE specifies that the relay is controlled via the network using
the nviReheatRelay .
0
1
255
nciFcuConfig
nciFcuConfig
nciFcuGains
PwmZeroPosn
PwmFullPosn
si_pid_Xp[0]
SNVT_lev_percent
0 to 100%
0%
This configuration variable specifies the zero position for PWM
actuators. This setting applies to PWM actuators only and is used for
both actuators if both are configured as PWM actuators.
SNVT_lev_percent
0 to 100%
100%
This configuration variable specifies the fully open position for PWM
actuators. This setting applies to PWM actuators only and is used for
both actuators if both are configured as PWM actuators.
SNVT_temp_p
2.25 to 180 DDF
(1.25 to 100 K), 0 = Disable
36 DDF (20 K)
This configuration variable specifies the throttling range for use in the
proportional portion of the PID loop gain for the cooling mode. The
minimum configurable value (not including 0 for disabling) is 3.6 DDF
(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to
1.0.3, the minimum value is 7.2 DDF (4 K).
43
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciFcuGains
si_pid_Xp[1]
SNVT_temp_p
2.25 to 180 DDF
(1.25 to 100 K), 0 = Disable
36 DDF (20 K)
This configuration variable specifies the throttling range for use in the
proportional portion of the PID loop gain for the heating mode. The
minimum configurable value (not including 0 for disabling) is 3.6 DDF
(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to
1.0.3, the minimum value is 7.2 DDF (4 K).
nciFcuGains
nciFcuGains
si_pid_Tn[0]
si_pid_Tn[1]
SNVT_time_sec
10 to 3200 seconds
0 = Disable
250 s
250 s
This configuration variable specifies the integral time for use in the
integral portion of the PID loop gain for the cooling mode.
SNVT_time_sec
10 to 3200 seconds
0 = Disable
This configuration variable specifies the integral time for use in the
integral portion of the PID loop gain for the heating mode.
nciFcuGains
nciFcuGains
nciFcuGains
si_pid_Tv[0]
si_pid_Tv[1]
si_boost[0]
SNVT_time_sec
10 to 3200 seconds
0 = Disable
0 s
This configuration variable specifies the derivative time for use in the
derivative portion of the PID loop gain for the cooling mode.
SNVT_time_sec
10 to 3200 seconds
0 = Disable
0 s
This configuration variable specifies the derivative time for use in the
derivative portion of the PID loop gain for the heating mode.
SNVT_temp_p
0.9 to 18 DDF (0.5 to 10 K)
0 = Disable
1.8 DDF (1 K)
This configuration variable specifies the temperature range to be
added to the cooling setpoint, above which the cooling output is fully
open to allow a faster response. For thermal actuators it is the
hysteresis for thermal control algorithm.
nciFcuGains
nciNumValve
nciSetPnts
si_boost[1]
SNVT_temp_p
0.9 to 18 DDF (0.5 to 10 K)
0 = Disable
1.8 DDF (1 K)
FOUR_PIPE
73.4°F (23°C)
This configuration variable specifies the temperature range to be
subtracted from the heating setpoint, below which the heating output is
fully open to allow a faster response. For thermal actuators it is the
hysteresis for thermal control algorithm.
SNVT_count
TWO_PIPE
FOUR_PIPE
This configuration variable specifies a two-pipe system (one valve) or a
four-pipe system (two valves). If set to TWO_PIPE, only the output
terminals for output1 are used. If set to FOUR_PIPE, output1 and
output2 are defined by nciFcuConfig.output_mode[].
1
2
occupied_cool
SNVT_temp_p
50 to 95°F (10 to 35°C)
This is the default setpoint for the occupied cooling setpoint which is
used in case there is no locally wired setpoint knob or nviSetpoint has
not been bound. Where the ZEB for occupied is used, it is derived from
the difference between occupied_cool and occupied_heat.
EN2B-0285GE51 R0909
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciSetPnts
standby_cool
SNVT_temp_p
50 to 95°F (10 to 35°C)
77°F (25°C)
This is the configured setpoint which applies to the standby cooling
mode. Where the ZEB for standby is used, it is derived from the
difference between standby_cool and standby_heat.
nciSetPnts
nciSetPnts
unoccupied_cool
occupied_heat
SNVT_temp_p
50 to 95°F (10 to 35°C)
82.4°F (28°C)
69.8°F (21°C)
This is the configured setpoint which applies to the unoccupied cooling
mode.
SNVT_temp_p
50 to 95°F (10 to 35°C)
This is the default setpoint for the occupied heating setpoint which is
used in case there is no locally wired setpoint knob or nviSetpoint has
not been bound. Where the ZEB for occupied is used, it is derived from
the difference between occupied_cool and occupied_heat.
nciSetPnts
nciSetPnts
nciWallMod
standby_heat
SNVT_temp_p
50 to 95°F (10 to 35°C)
66.2°F (19°C)
60.8°F (16°C)
180 min
This is the configured setpoint which applies to the standby heating
mode. Where the ZEB for standby is used, it is derived from the
difference between standby_cool and standby_heat.
unoccupied_heat
ui_bypass_time
SNVT_temp_p
50 to 95°F (10 to 35°C)
This is the configured setpoint which applies to the unoccupied heating
mode.
UWORD
0 to 1080 minutes
This configuration variable specifies the time the controller remains in
OCCUPIED mode before reverting to the original occupancy mode
after pressing the override button at the wall module or initiating
BYPASS via the network. When the bypass mode has been activated,
the bypass timer is set to ui_bypass_time. When the timer expires,
nvoFcuStatus.occ_status.hw_override reverts from OC_BYPASS to
OC_NUL to quit the bypass override function.
nciWallMod
nciWallMod
nciWallMod
si_low_setpt
si_high_setpt
SNVT_temp_p
-9 to 9 DDF (-5 to 5 K) for
relative
53.6 to 86°F (12 to 30°C) for
absolute
-9 DDF (-5 K)
(53.6°F (12°C) for
absolute setpoint)
This configuration variable specifies the low limit for the setpoint knob.
It can be relative or absolute depending upon the configuration in
nciWallMod.set_pnt_knob.
SNVT_temp_p
-9 to 9 DDF (-5 to 5 K) for
relative
53.6 to 86°F (12 to 30°C) for
absolute
9 DDF (5 K)
(86°F (30°C) for
absolute setpoint)
This configuration variable specifies the high limit for the setpoint knob.
It can be relative or absolute depending upon the configuration in
nciWallMod.set_pnt_knob.
si_space_temp_zero_
cal
SNVT_temp_p
--9 to 9 DDF (-5 to 5 K)
0 DDF (0 K)
The space temperature sensor is corrected by adding this calibration
setting (an offset value) to the sensed value.
45
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EN2B-0285GE51 R0909
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C2. Configuration Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciWallMod
use_wall_mod_st_pt
Bit
NO
YES
YES
This configuration variable specifies whether the setpoint used is from
the knob on the wall module connected to the controller or from the
network via nciTempSetPts. If set to NO, all setpoints to be used come
from the network via nciTempSetPts. If set to YES, an additional option
set_pnt_knob must be set to specify type of setpoint adjustment (see
below).
0
1
nciWallMod
set_pnt_knob
2 Bits
OFFSET
ABSOLUTE_MIDDLE
OFFSET
This configuration variable specifies specifies the usage of the setpoint
knob on the wall module for the occupied setpoint. OFFSET specifies a
relative scale on the wall module where the setpoint is calculated by
adding the setpoint potentiometer value (± 5 K) to the appropriate
value of nciTempSetPts. ABSOLUTE_MIDDLE specifies an absolute
scale on the wall module. The setpoint knob directly determines the
center point of occupied cooling and heating setpoints. The respective
cooling and heating setpoint is determined by the setpoint knob
position adding or subtracting half of the user selectable ZEB defined
in nciSetPnts.<occ_mode>_cool or nciSetPnts.<occ_mode>_heat .
This applies to <occ_mode> OCCUPIED and STANDBY.
0
2
nciWallMod
override_type
2 Bits
BYPASS_UNOCCUPIE
D
This configuration variable specifies the behavior of the override
button. BYPASS_UNOCCUPIED allows overriding the current
occupancy mode to OCCUPIED for a configurable bypass time, or
causing a permanent override to UNOCCUPIED. BYPASS allows only
the temporary override to OCCUPIED and canceling it.
NO_BUTTON
BYPASS_UNOCCUPIED
BYPASS
0
1
2
nciWallMod
nciWallMod
override_priority
display_type
Bit
LAST_WINS
This configuration variable specifies the priority of the local (wall
module push-button) or central (network interface) override. If
NETWORK_WINS is set and the network sends value NUL, then the
override button is active.
LAST_WINS
NETWORK_WINS
0
1
Bit
LED_OVERRIDE
This configuration variable specifies the display of occupancy and/or
override. LED_OVERRIDE shows the override from the bypass button
or from the network. LED_OCCUPANCY shows the effective
occupancy mode. LCD_DISPLAY is only used for T7560 Wall Modules.
The display shows the occupancy mode with different symbols, and the
override mode with flashing symbols.
LED_OVERRIDE
LED_OCCUPANCY
LCD_DISPLAY
0
1
2
EN2B-0285GE51 R0909
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviApplicMode
SNVT_hvac_mode
HVAC_AUTO
HVAC_HEAT
HVAC_COOL
HVAC_OFF
HVAC_AUTO
This input variable coordinates the controller operation with the
main equipment controller. Depending upon the available supply
energy, the main equipment controller commands the Fan Coil
Unit controller to operate in heat mode only, cool mode only or
heat and cool mode if appropriate to the configuration.
0
1
3
6
(if bound but fails to be
received or at application
restart)
HVAC_NUL
255
HVAC_AUTO means that both heating and cooling equipment are
available, and the current mode is determined by the control
algorithm depending upon the room temperature and effective
setpoint. HVAC_AUTO is invalid for changeover applications.
When the Digital input is configured for Heat/Cool changeover
input, this input will always have priority over the network
nviApplicMode’s HVAC_HEAT or HVAC_COOL.
nviDlcShed
BYTE
NORMAL
SETPOINT_SHIFT
0 (if bound but fails to be
received or at application
restart)
This input variable is from an energy management system. When
it is 0, the temperature control algorithm operates in a normal
mode. When it is 1, the effective setpoint will be shifted by the
amount defined in nciEmergyManag.si_dlc_setpt_bump. For
cooling the effective setpoint will be increased, for heating the
effective setpoint will be decreased always with regard to the frost
protection limit.
0
1
nviEmerg
SNVT_hvac_emerg
EMERG_NORMAL
EMERG_PRESSURIZE
EMERG_DEPRESSURIZE
EMERG_PURGE
EMERG_NORMAL
(at application restart)
This input variable is an emergency input from a device that
determines the correct action during a given emergency (such as
a fire).
0
1
2
3
4
255
•
EMERG_NORMAL, EMERG_NUL: terminate EMERG_
commands and restores the control algorithm.
EMERG_PRESSURIZE, EMERG_PURGE,
EMERG_SHUTDOWN: heat/cool outputs OFF, fan ON at
highest speed.
EMERG_SHUTDOWN
EMERG_NUL
•
•
EMERG_DEPRESSURIZE: heat/cool outputs OFF, fan OFF.
nviFanSpeedCmd
nviFanSpeedCmd
value
SNVT_switch
0 to 100%
100%
(at application restart)
This input variable allows control of the fan speed by another
node, such as another Fan Coil Unit Controller acting as a master
in a master/slave relationship.
state
SNVT_switch
OFF
NUL
See above.
0
(at application restart)
ON
1
NUL
255
nviInUse
UWORD
0 to 65535
0 (if bound but fails to be
received), 65535 ( for 60s
at application restart)
This input variable is used by the engineering tool or other
supervisory node that it is "logged on" to the controller node. It
should be set every minute, or the controller will reset it after 60s
to automatically log off the supervisory node.
47
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviManCool
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This input variable can be used for master/slave installations
where the cool output is controlled by an external controller node.
In this case, the output signal of the cooling control algorithm (0-
100%) of the master has to be bound to nviManCool and then
takes over the task of the local (slave) control algorithm while the
switch levels operate as locally configured. The heating output will
be closed.
nviManHeat
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This input variable can be used for master/slave installations
where the heat output is controlled by an external controller node.
In this case, the output signal of the heating control algorithm (0-
100%) of the master has to be bound to nviManHeat and then
takes over the task of the local (slave) control algorithm while the
switch levels operate as locally configured. The cooling output will
be closed.
nviManOccCmd
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
OC_STANDBY
OC_NUL
OC_NUL
(at application restart)
This input variable is from an network connected operator inter-
face or other node that indicates the state of manual occupancy
control (schedule override). It has priority over the time program
(nviTodEvent). When the BYPASS mode is set, the bypass time is
active. When the bypass time has elapsed, the master controller
automatically sets nviManOccCmd to OC_NUL. nviManOccCmd
does not provide a failure detect mechanism in case no periodic
update is received.
0
1
2
3
255
nviManualMode
BYTE
MODE_ENABLE and
UNSUPPRESS_ALARMS
(at application restart)
This input variable is used to disable the controller’s control
algorithms in order to manually set its physical outputs. The
controller still responds to smoke purge even when disabled or set
to manual or factory test mode. It remains unchanged until another
mode has been commanded or an application restart has been
performed.
MODE_ENABLE
MODE_DISABLE
MODE_MANUAL
SUPPRESS_ALARMS
UNSUPPRESS_ALARMS
0
1
2
3
4
•
•
•
MODE_ENABLE: starts the control algorithm at an initial state
after MODE_DISABLE or MODE_MANUAL.
MODE_DISABLE: all outputs switched OFF, the alarm
ALARM_NODE_OFF is issued.
MODE_MANUAL: all control loops are disabled and the alarm
ALARM_NODE_OFF is issued. The outputs can be controlled
manually via the nviTest command
•
•
SUPPRESS_ALARMS: nvoAlarm is not sent and
nvoAlarmStatus and nvoAlarmLog are not updated until
UNSUPPRESS_ALARMS is set or an application restart.
UNSUPPRESS_ALARMS: releases alarm suppression after
SUPPRESS_ALARMS.
EN2B-0285GE51 R0909
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviReheatRelay
value
SNVT_switch
0 to 100%
0 (at application restart)
This input variable is used to control the reheat relay via the
network. This permits use of the relay as an auxiliary output in
applications where reheat is not required as well master/slave
applications where the reheat output is controlled by another
controller acting as master.
nviReheatRelay
nviRequest
state
SNVT_switch
OFF
ON
OFF (at application restart) See above.
0
1
255
NUL
object_id
SNVT_obj_request
UWORD
0=Node Object
1=Fan Coil Object
This input variable belongs to the Node Object and provides the
mechanism to request a particular mode for a particular object
within a node.
nviRequest
object_request
object_request_t
Enum from Echelon defined
RQ_NORMAL
RQ_UPDATE_STATUS
RQ_UPDATE_ALARM
RQ_REPORT_MASK
See above. Commanding any modes other the ones listed will
result in an “invalid_request” when reading nvoStatus.
0
2
4
5
nviSensorOcc
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
OC_NUL
This input variable allows an occupancy sensor of another Excel
10 controller to be used to indicate the sensed occupancy state of
the space. OC_NUL means no input is available because it is not
bound, bound but not received periodically, or not configured by
nciFcuConfig.DI1_config. More than one occupancy sensor may
be bound to nviSensorOcc. If any one sensor detects occupancy,
the controller considers the space occupied.
0
1
2
255
(if bound but fails to be
received or at application
restart)
OC_NUL
nviSetPoint
SNVT_temp_p
50 to 95°F (10 to 35°C)
327.67°C = INVALID
INVALID
(at application restart)
This input variable is used for binding third party nodes to
authorize them for setpoint modifications. When this has been
bound and a valid update is received, the local configured set-
points will no longer be directly used to determine the current
occupancy setpoint. For OCCUPIED and STANDBY modes, this
is used with the appropriate ZEB (derived from the configured
setpoints), for UNOCCUPIED mode the setpoint does not depend
upon this input, but upon nciTempSetPts.unoccupied_cool/_heat
only. nviSetpoint is stored in RAM and gets lost after power
failure. In this case, the setpoints of nciTempSetPts will be used
until a valid nviSetpoint is received.
49
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviSetPtOffset
SNVT_temp_p
0 (if bound but fails to be
received or at application
restart)
This input variable is used for binding third party nodes to
authorize them for setpoint shifting. nviSetPtOffset is stored in
RAM and will be initialized to zero after application restart or
power failure. If nviSetPtOffset is bound and fails to be received
periodically as configured with nciRcvHrtBt, it will be reset to zero.
-18 to 18 DDF (-10 to 10 K)
589.806 DDF (327.67 K) =
INVALID
nviSpaceTemp
SNVT_temp_p
INVALID
This input variable is the space temperature transmitted from
another Excel 10 controller or another node that has a tem-
perature sensor wired to it. If bound or has a value other than
INVALID, then it is used as the sensed space temperature instead
of the wired wall module's temperature. nviSpaceTemp may be
set to a value other than INVALID using a LNS tool when
nviSpaceTemp is not bound to set the temperature to a fixed
value.
0 to 104°F (0 to 40°C)
621.806°F (327.67°C) =
INVALID
(if bound but fails to be
received or at application
restart)
nviTest
output1_cmd
BYTE
NORMAL_HC_MODE
(at application restart)
This input variable is used by factory test, OEM field test, field
installation, and field testing to manually command the physical
output 1 when the node has been put into manual mode
(nviManualMode = MODE_MANUAL).
NORMAL_HC_MODE: output 1 remains in its current position
OFF1_OFF2, ON1_OFF2, OFF1_ON2, ON1_ON2: set the
individual triacs ON or OFF
NORMAL_HC_MODE
OFF1_OFF2
ON1_OFF2
OFF1_ON2
ON1_ON2
0
1
2
3
4
5
TESTPOSITION
TESTPOSITION: sets output based upon output1_test_pos.
nviTest
nviTest
output1_test_pos
output2_cmd
SNVT_lev_percent
0 to 100%
0 (at application restart)
This input variable is used for the TESTPOSITION of the
output1_cmd and is based upon the configured runtime/cycle
time.
BYTE
NORMAL_HC_MODE
(at application restart)
Same as output1_cmd for output 2.
NORMAL_HC_MODE
OFF1_OFF2
ON1_OFF2
OFF1_ON2
ON1_ON2
0
1
2
3
4
5
TESTPOSITION
nviTest
nviTest
output2_test_pos
reheat_cmd
SNVT_lev_percent
0 to 100%
0 (at application restart)
Same as output1_test_pos for output 2
BYTE
NORMAL_HC_MODE
(at application restart)
This input variable is used to test the reheat relay.
NORMAL_HC_MODE
OFF1_OFF2
ON1_ON2
0
1
4
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviTest
fan_control
BYTE
NORMAL_FAN_MODE
(at application restart)
This input variable is used to test the fan speed relays.
NORMAL_FAN_MODE
OFF1_OFF2_OFF3
ON1_OFF2_OFF3
OFF1_ON2_OFF3
ON1_ON2_OFF3
OFF1_OFF2_ON3
ON1_OFF2_ON3
OFF1_ON2_ON3
ON1_ON2_ON3
0
1
2
3
4
5
6
7
8
nviTest
override_LED
current_state
BYTE
NORMAL_LED_MODE
LED_OFF
NORMAL_LED_MODE
(at application restart)
This input variable can be used to test the wall module LED when
nviManualMode = MODE_MANUAL.
0
1
2
LED_ON
nviTodEvent
SNVT_tod_event.current_state
OC_OCCUPIED
OC_UNOCCUPIED
OC_STANDBY
OC_OCCUPIED
(if bound but fails to be
received or at application
restart)
This input variable indicates to the node whether the space is
currently scheduled to be occupied, standby or unoccupied.
0
1
3
OC_NUL
255
nviTodEvent
next_state
SNVT_tod_event.next_state
OC_OCCUPIED
OC_UNOCCUPIED
OC_STANDBY
OC_OCCUPIED
(if bound but fails to be
received or at application
restart)
This input variable indicates to the node whether the next
scheduled occupancy mode will be occupied, standby or
unoccupied. This information is required by the controller to
perform the optimum start strategy.
0
1
3
OC_NUL
255
nviTodEvent
time_to_next_state
SNVT_tod_event.time_to_next_s
tate
UWORD
0 (if bound but fails to be
received or at application
restart)
This input variable specifies the time in minutes until the next
change of scheduled occupancy state. This data is also used by
the optimum start calculation (see nciEnergyManag).
0 to 2880 minutes
51
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C3. Input Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviWindow
value
SNVT_switch.value
0 to 100%
0 (if bound but fails to be
received or at application
restart)
This input variable allows a window contact node or another
controller to be used as remote window contact. More than one
nvoWindow may be bound to one nviWindow, which allows one
node to be used to handle several distributed window contacts. In
this case the control process assumes an open window if at least
one bound window node detects an open window. ‘Window
Closed’ would be assumed if all nvoWindows bound to nviWindow
indicate the window being closed for at least the failure detect time
(nciSndHrtBt).
nviWindow
state
SNVT_switch.state
CLOSED
OPEN
NO_WINDOW
See above.
0
1
255
(if bound but fails to be
received or at application
restart)
NO_WINDOW
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nvoActiveSetPt
SNVT_temp_p
This output variable shows the active setpoint of the control
algorithm. It is based upon the occupancy setpoints, the offset, and
recovery ramping.
50 to 95°F (10 to 35°C)
621.806°F (327.67°C) =
INVALID
nvoAlarm
nvoAlarm
subnet
UBYTE
0 to 255
This output variable is the LonWorks subnet number (in domain
entry 1 of the node’s domain table).
node
type
UBYTE
0 to 255
This output variable is the LonWorks node number (in domain
entry 1 of the node’s domain table).
nvoAlarm
UBYTE
RETURN_TO_NORMAL This output variable reports the latest changed error condition
ALM_NO_ALARM
ALM_NODE_OFF
ALM_FROST
0
1
2
3
4
5
6
7
(at application restart)
detected in the node. The first 5 bits are used for the alarm type
number, and this number is added to RETURN_TO_NORMAL
(128) when the error condition is no longer true. Each error
condition/return-to-normal is issued only once. The type is also
recorded in nvoAlarmLog and nvoFcuStatus.alarm_type.
(continued)
ALM_INVALID_SETPNT
ALM_TEMP_SENSOR_FAIL
ALM_SETPNT_KNOB_FAIL
ALM_FAN_SPEED_SW_FAIL
ALM_FAN_FAILURE
ALM_COMFAIL_SPACETEMP
ALM_COMFAIL_HVACMODE
ALM_COMFAIL_SETPTOFFS
ALM_COMFAIL_SCHEDOCC
ALM_COMFAIL_DLC
ALM_COMFAIL_TEMPRESET
ALM_COMFAIL_ODTEMP
ALM_COMFAIL_OCCSENSOR
ALM_COMFAIL_WINDOW
ALM_COMFAIL_MANHEAT
ALM_COMFAIL_MANCOOL
ALM_HW_SW_MISMATCH
RETURN_TO_NORMAL
RTN_NODE_OFF
Alarm reporting is suppressed by settin nviManualMode to
SUPPRESS_ALARMS, in which case nvoAlarm.type is set to
ALARM_NOTIFY_DISABLED. Alarm reporting is turned ON again
by setting nviManualMode to UNSUPPRESS_ALARMS, after
which all existing alarms (or ALM_NO_ALARM) are reported one
at a time.
8
9
10
11
12
13
14
15
16
17
18
19
128
129
130
131
132
133
134
135
136
137
RTN_FROST
RTN_INVALID_SETPNT
RTN_TEMP_SENSOR_FAIL
RTN_SETPNT_KNOB_FAIL
RTN_FAN_SPEED_SW_FAIL
RTN_FAN_FAILURE
RTN_COMFAIL_SPACETEMP
RTN_COMFAIL_HVACMODE
nvoAlarm
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EN2B-0285GE51 R0909
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
138
139
140
141
142
143
144
145
146
147
255
RTN_COMFAIL_SETPTOFFS
RTN_COMFAIL_SCHEDOCC
RTN_COMFAIL_DLC
RTN_COMFAIL_TEMPRESET
RTN_COMFAIL_ODTEMP
RTN_COMFAIL_OCCSENSOR
RTN_COMFAIL_WINDOW
RTN_COMFAIL_MANHEAT
RTN_COMFAIL_MANCOOL
RTN_HW_SW_MISMATCH
ALARM_NOTIFY_DISABLED
nvoAlarmLog
alarm_type[0]
Same as nvoAlarm.type
See nvoAlarm.type
A central node may poll this output variable for a short history of
alarms. It contains the last five alarms reported via nvoAlarm. At
the time a new nvoAlarm is issued, nvoAlarmLog is updated.
nvoAlarmLog
nvoAlarmLog
nvoAlarmLog
nvoAlarmLog
nvoAlarmStatus
alarm_type[1]
alarm_type[2]
alarm_type[3]
alarm_type[4]
error_bit[0]
Same as nvoAlarm.type
Same as nvoAlarm.type
Same as nvoAlarm.type
Same as nvoAlarm.type
See nvoAlarm.type
See nvoAlarm.type
See nvoAlarm.type
See nvoAlarm.type
See above.
See above.
See above.
See above. nvoAlarmLog.alarm_type[4] is the oldest alarm.
UBYTE
Bit coded Alarm:
ALM_NODE_OFF
ALM_FROST
ALM_INVALID_SETPNT
ALM_TEMP_SENSOR_FAIL
ALM_SETPNT_KNOB_FAIL
ALM_FAN_SPEED_SW_FAIL
ALM_FAN_FAILURE
ALM_COMFAIL_SPACETEMP
This output variable is a polled output containing a list of all the
current errors detected by the node. A search for error conditions
in the node is made periodically. A central node may poll the
nvoAlarmStatus output for all of the current errors. nvoAlarmStatus
contains all the current detected errors even though they may be
suppressed for reporting by nvoAlarm.
1
2
4
8
16
32
64
128
nvoAlarmStatus
error_bit[1]
UBYTE
See above.
Bit coded Alarm:
ALM_COMFAIL_HVACMODE
ALM_COMFAIL_SETPTOFFS
ALM_COMFAIL_SCHEDOCC
ALM_COMFAIL_DLC
1
2
4
8
ALM_COMFAIL_TEMPRESET
ALM_COMFAIL_ODTEMP
ALM_COMFAIL_OCCSENSOR
ALM_COMFAIL_WINDOW
16
32
64
128
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nvoAlarmStatus
error_bit[2]
UBYTE
See above.
Bit coded Alarm:
ALM_COMFAIL_MANHEAT
ALM_COMFAIL_MANCOOL
ALM_HW_SW_MISMATCH
1
2
4
nvoApplicMode
nvoCoolOutput
SNVT_hvac_mode
HVAC_AUTO
HVAC_HEAT
HVAC_COOL
HVAC_OFF
HVAC_OFF
(at application restart)
This output variable is used to coordinate the slave devices with
the master controller. It reflects the current heat/cool medium
based upon the available supply energy. This is required for con-
figurations with heat/cool changeover. HVAC_OFF switches the
heat/cool control OFF while still providing frost protection and
reporting status and alarms.
0
1
3
6
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This output variable is the cooling output which is typically used for
monitoring or bound to a cooling actuator node or another con-
troller operating as slave. nvoCoolOutput will be transmitted
immediately when its value has changed significantly (>= 1%), and
periodically according to nciSndHrtBt. The output value represents
the output of the control algorithm but is limited to a range of 0% to
100%.
nvoDigitInState
value
state
SNVT_switch.value
0 to 100%
This output variable indicates the binary state of the controller's
digital input which can be configured to support a window contact,
an occupancy/movement sensor, an air flow contact, or a heat/cool
changeover contact. It can be bound to another Excel 10 controller
or a third party node.
nvoDigitInState
nvoEffectOcc
SNVT_switch.state
OFF
ON
See above.
0
1
255
NOT_ASSIGNED
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
This output variable reflects the effective occupancy mode derived
from the time schedule, occupancy sensor, override button, and
network occupancy override.
0
1
2
3
OC_STANDBY
nvoFanSpeed
nvoFanSpeed
value
state
SNVT_switch.value
0 to 100%
0 (at application restart)
This output variable reports the fan speed for the controller. It can
be bound to another Excel 10 controller with a fan connected or to
a third-party fan node.
SNVT_switch.state
NO_FAN
See above.
OFF
ON
0
1
(at application restart)
55
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
value
255
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
NO_FAN
nvoFanSpeedSw
nvoFanSpeedSw
value
SNVT_switch.value
0 to 100%
This output variable allows the fan speed switch of a master
controller to be used for all slave Excel 10 controllers in the same
room.
state
SNVT_switch.state
See above.
OFF
ON
NO_FAN_SPEED_SW
nvoFcuStatus
field_no
UBYTE
This output variable is used to indicate which other data field in
nvoFcuStatus has changed since the last time nvoFcuStatus was
sent out on the network. If any field has had a significant change,
only that field is updated, and field_no indicates which field. If three
or more fields have changed significantly, then all fields are
updated and field_no is set to 0. All fields are also updated every
refresh time (55s).
FIELD_EFFECT_OCC
FIELD_HW_OVERRIDE
FIELD_SCHED_OCC
FIELD_EFF_SEN_OCC
FIELD_NET_MAN_OCC
FIELD_HW_SEN_OCC
FIELD_R_O_LED
1
2
3
4
5
6
7
FIELD_MODE
8
FIELD_ALARM_TYPE
FIELD_DLC_SHED
9
10
11
12
13
14
15
16
17
18
19
20
21
FIELD_EFF_WINDOW_OPEN
FIELD_HW_WINDOW_OPEN
FIELD_FAN_FEEDBACK
FIELD_EXTERNAL_ACTIVE
FIELD_FAN_STAGES_ACTIVE
FIELD_OUTPUT_POS_1
FIELD_OUTPUT_POS_2
FIELD_REHEAT_RELAY
FIELD_ACTIVE_SET_PT
FIELD_SPACE_TEMP
FIELD_REST_BYPASS_TIME
nvoFcuStatus
nvoFcuStatus
effect_occ
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
This output variable is the effective occupancy mode resulting from
scheduled occupancy mode, occupancy sensor information,
bypass push-button, or manual operator interface.
0
1
2
3
OC_STANDBY
hw_override
SNVT_occupancy
OC_UNOCCUPIED
OC_BYPASS
This output variable reports the current state of the remote override
button.
1
2
OC_NUL (No Override)
255
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nvoFcuStatus
sched_occ
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
This output variable reports the current scheduled occupancy
received via the network.
0
1
2
OC_STANDBY
3
OC_NUL (No Override)
255
nvoFcuStatus
nvoFcuStatus
eff_sen_occ
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_NUL (No Override)
This output variable reports the effective state of occupancy
sensor(s) connected either to the input terminals or to other nodes
on the network that are bound to this controller.
0
1
255
net_man_occ
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_BYPASS
This output variable reports the manual occupancy from the
network.
0
1
2
OC_STANDBY
OC_NUL
3
255
nvoFcuStatus
nvoFcuStatus
hw_sen_occ
r_o_led
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_NUL
This output variable reports the state of the occupancy sensor
wired to the node.
0
1
255
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCIPIED
OC_BYPASS
OC_STANDBY
OC_NUL
This output variable reports the current state of the remote override
LED which indicates the effective schedule override resulting from
the bypass push-button or a network override.
OC_OCCUPIED: 2 flashes per second
OC_UNOCCUPIED: 1 flash per second
OC_BYPASS: on
0
1
2
3
255
OC_STANDBY: 2 flashes per second
OC_NUL: off
nvoFcuStatus
mode
BYTE
CTL_COOL
CTL_HEAT
This output variable is the current operating mode of the node
determined by many inputs and arbitrated by control logic.
CTL_PRESSURIZE disables the heat/cool outputs, fan runs at
highest speed.
CTL_DE_PRESSURIZE disables the heat/cool outputs, fan is
turned OFF.
CTL_MODE_MANUAL allows turning outputs ON/OFF manually
through nviTest.
CTL_MODE_FACTORY_TEST is intended only for the factory.
CTL_FLOATING_OUT_SYNCH allows enough time (150% valve
run-time) for the valve(s) are at their initial positions (control
algorithms are active). The controller then goes into one of the
0
1
2
3
4
5
6
7
(continued)
CTL_PRESSURIZE
CTL_DE_PRESSURIZE
CTL_MODE_MANUAL
CTL_MODE_FACTORY_TEST
CTL_FLOATING_OUT_SYNCH
CTL_FAN_SWITCH_OFF
CTL_START_UP_WAIT
CTL_DISABLED
8
255
57
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
normal operating modes, such as CTL_COOL. When the effective
occupancy changes to unoccupied or 24 hours have elapsed since
the last start-up or CTL_FLOATING_OUT_SYNCH mode, the
controller enters this mode again to reset the floating output
position tracking.
nvoFcuStatus
CTL_START_UP_WAIT is the first mode after an application
restart. No control algorithms are active, and heat/cool outputs stay
in their default positions. CTL_FLOATING_OUT_SYNCH follows.
CTL_DISABLED disables heat/cool control.
nvoFcuStatus
nvoFcuStatus
alarm_type
Same as nvoAlarm.type
This output variable is the latest alarm detected by the node (if
any) and has the same value as nvoAlarm.type.
dlc_shed
Bit
This output variable indicates the state of the demand limit control.
NOT ACTICE
ACTIVE
0
1
nvoFcuStatus
nvoFcuStatus
eff_window_open
hw_window_open
Bit
This output variable indicates the real status of the window
detection, either from the digital input or from the network.
CLOSED or NOT_ASSIGNED
OPEN
0
1
Bit
This output variable indicates the status of the digital input
configured as a window contact.
CLOSED or NOT_ASSIGNED
OPEN
0
1
nvoFcuStatus
fan_feedback
Bit
This output variable indicates the status of the fan when the digital
input is configured for an air flow sensor.
FAN_OFF_AFTER_ON_CMD
FAN_RUNS
0
1
nvoFcuStatus
nvoFcuStatus
external_active
Bit
This output variable applies to nciFcuConfig.reheat_config =
EXTERNAL only and indicates the state of the relay.
EXTERNAL_NOT_ACTICE
EXTERNAL_ACTIVE
0
1
fan_stages_active
UBYTE
F_OFF
When the controller is configured for one or more fan stages, this
output variable reports the current fan stage active.
0
F_SPEED1
F_SPEED2
F_SPEED3
F_NO_FAN
1
2
3
255
nvoFcuStatus
nvoFcuStatus
output_position[0]
output_position[1]
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This output variable indicates the position of the output 1.
This output variable indicates the position of the output 2.
SNVT_lev_percent
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
0 to 100%
163.835% = INVALID
nvoFcuStatus
nvoFcuStatus
nvoFcuStatus
reheat_active
active_set_pt
space_temp
SNVT_lev_disc
ST_OFF
ST_ON
This output variable reports the current state of the reheat output,
when the controller is configured for one.
0
4
255
ST_NUL (No Reheat)
SNVT_temp_p
This output variable reports the current temperature control point
calculated from the various setpoints, operating modes, and
optimum start-up gradients.
50 to 95°F (10 to 35°C)
621.806°F (327.67°C) =
INVALID
SNVT_temp_p
This output variable reports the current space temperature used for
the control algorithm.
0 to 104°F (0 to 40°C)
621.806°F (327.67°C) =
INVALID
nvoFcuStatus
rest_bypass_time
field_no
UWORD
0 to 65535 Min
This output variable shows the current value in minutes of the
active bypass timer
nvoFcuStatusP
Same as nvoFcuStatus.
This output variable is the same as nvoFcuStatus except not sent
as heartbeat. This variable is sent only in response to a poll
request, typically from a supervisory device.
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
effect_occ
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
hw_override
sched_occ
eff_sen_occ
net_man_occ
hw_sen_occ
r_o_led
mode
alarm_type
dlc_shed
eff_window_open
hw_window_open
fan_feedback
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EN2B-0285GE51 R0909
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoFcuStatusP
nvoHeatOutput
external_active
fan_stages_active
output_position[0]
output_position[1]
reheat_active
Same as nvoFcuStatus
Same as nvoFcuStatus
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
Same as nvoFcuStatus.
active_set_pt
space_temp
rest_bypass_time
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This output variable is the heating output which is typically used for
monitoring or bound to a heat actuator node or another Excel 10
controller operating as slave. nvoHeatOutput will be transmitted
immediately when its value has changed significantly (>= 1%), and
periodically according to nciSndHrtBt. The output value represents
the output of the control algorithm but is limited to a range of 0% to
100%.
nvoReheat
nvoReheat
value
state
SNVT_switch.value
0 to 100%
This output variable reports the actual state of the reheat output. It
can be bound to another Excel 10 controller acting as a slave, or it
can be bound to a third-party reheat node.
SNVT_switch.state
OFF
ON
See above.
0
1
2
NO_REHEAT
nvoSensor
nvoSensor
nvoSensor
override_button
contact_state_DI1
raw_data[0]
Bit
This output variable indicates the status of the override push-
button.
NOT_PRESSED
PRESSED
0
1
Bit
This output variable indicates the state of the digital input.
CONTACT_OPEN
CONTACT_CLOSED
0
1
UWORD
0 to 65535
This output variable contains the analog to digital converter count
measured from the analog value of the temp. sensor, which
represents the measured time during the second part of each A/D
conversion.
nvoSensor
nvoSensor
raw_data[1]
raw_data[2]
UWORD
0 to 65535
Same as above for the fan speed switch.
UWORD
Same as above for the setpoint knob.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
0 to 65535
nvoSensor
fan_speed_switch
SNVT_lev_disc
ST_OFF
This output variable indicates the position of the fan speed switch
ON the wall module.
0
ST_LOW
1
ST_MED
2
ST_HIGH
3
ST_NUL (No Switch)
255
nvoSensor
remote_set_point
SNVT_temp_p
-9 to 9 DDF (-5 to 5 K) for
relative
This output variable is the setpoint from the wall module setpoint
knob and may be absolute or relative depending upon
nciWallMod.set_pnt_knob.
53.6 to 86°F (12 to 30°C) for
absolute
nvoSensor
nvoSensor
space_temp
SNVT_temp_p
This output variable is the measured space temperature.
0 to 104°F (0 to 40°C)
621.806°F (327.67°C) =
INVALID
ub_hard_config
BYTE
INITIAL
W7752D, F
W7752E, G
INVALID
INITIAL
(at application restart)
This output variable is used to establish hardware-dependent
factory default configuration settings for the Fan Coil Unit
controller. Note that D and F versions and E, G and J versions
differ only in their supply voltage.
0
4
5
255
nvoSensorOcc
nvoSpaceTemp
SNVT_occupancy
OC_OCCUPIED
OC_UNOCCUPIED
OC_NUL (No Sensor)
OC_NUL
(at application restart)
This output variable shows the state of the locally-wired occupancy
sensor, if one is configured by nciFcuConfig.DI1_config. OC_NUL
means no input is available because it is not bound or not
configured by nciFcuConfig.DI1_config.
0
1
255
SNVT_temp_p
INVALID
(at application restart)
This output variable is the sensed space temperature at the node
taken from the locally-wired sensor. It is typically bound to
nviSpaceTemp of another node which may not have its own space
temperature sensor but controls the same space. It is also used for
monitoring purposes, showing the current space temperature used
for the control algorithm. nvoSpaceTemp is transmitted
0 to 104°F (0 to 40°C)
621.806°F (327.67°C) =
INVALID
immediately when its value has changed significantly (> 0.5
delta°C). The reported space temperature includes the offset
correction nciWallMod.si_space_temp_zero_cal. If a space
temperature sensor is not connected or is shorted or if
61
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nviSpaceTemp is bound to another node, nvoSpaceTemp is not
reported on the network.
nvoStatus
object_id
UWORD
NODE_OBJECT
FCU_OBJECT
This output variable belongs to the Node Object and reports the
status for any object on a node. This is the answer to the
nviRequest.
0
1
nvoStatus
nvoStatus
invalid_id
Bit
This output variable indicates whether nviRequest uses a fault
object ID.
VALID_ID
INVALID_ID
0
1
invalid_request
Bit
This output variable indicates whether nviRequest uses a fault
request.
VALID_REQUEST
INVALID_REQUEST
0
1
nvoStatus
disabled
Bit
This output variable indicates whether the device is enabled or
disabled (nviManualMode = DISABLE).
ENABLED
DISABLED
0
1
nvoStatus
comm_failure
in_alarm
Bit
This output variable indicates whether an update nviRcvHrtBt is
missing.
COMMUNICATION_OK
COMMUNICATION_FAILURE
0
1
nvoStatus
Bit
This output variable indicates whether an alarm occured. See
nvoAlarm.
NO_ALARM
IN_ALARM
0
1
nvoStatus
report_mask
Bit
This output variable shows the answer to nviRequest >
REPORT_MASK
NO_REPORT_MASK
REPORT_MASK
0
1
nvoTerminalLoad
SNVT_lev_percent
-163..163%
163.835% = INVALID
This output variable shows the terminal load, which is a percentage
between -160% and +160% based upon the control output level.
Negative values indicate heating load and positive values indicate
cooling load. 100% is the full terminal capacity. An absolute
terminal load value of more than 100% indicate that the terminal is
not able to supply the required heating or cooling energy which at
the zone controller should cause a demand for more supply
energy. nvoHeatOutput will be transmitted immediately when its
value has changed significantly (>= 1%).
nvoUnitStatus
mode
SNVT_hvac_mode
HVAC_HEAT
HVAC_COOL
HVAC_OFF
This output variable reports the last operating mode of the control
algorithm. It is not set to HVAC_OFF if the Heating and Cooling
Output shows 0%. HVAC_OFF is set when the Device is disabled
from nviRequest, nviManualMode or nviApplicMode.
1
3
6
EN2B-0285GE51 R0909
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
nvoUnitStatus
heat_output_primary SNVT_lev_percent
0 to 100%
This output variable reports the actual heating output value. Any
change forces nvoUnitStatus to be transmitted immediately.
163.835% = INVALID
nvoUnitStatus
nvoUnitStatus
heat_output_
secondary
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This output variable reports the reheat output value.
cool_output
SNVT_lev_percent
0 to 100%
163.835% = INVALID
This output variable reports the actual cooling output value. A
change of more than 1% forces nvoUnitStatus to be transmitted
immediately.
nvoUnitStatus
nvoUnitStatus
fan_output
in_alarm
SNVT_lev_percent
0 to 100%
This output variable reports the actual fan speed level.
UBYTE
NO_ALARM
ALARM
This output variable reports the actual alarm status of the controller
and is set to ALARM_NOTIFY_DISABLE when nviManualMode =
SUPPRESS_ALARMS.
0
1
ALARM_NOTIFY_DISABLED
255
nvoWindow
nvoWindow
value
state
SNVT_switch.value
0 to 100%
0
This output variable reports the status of the window sensor. It
allows the locally-wired window sensor to be used by other nodes
on the network.
(at application restart)
SNVT_switch.state
CLOSED
NO_WINDOW
(at application restart)
See above.
0
OPEN
1
NO_WINDOW
255
nroPgmVer
id[0]
UBYTE, 70 = F
This output variable identifies the Excel 10 node type by an eight
byte constant describing the node type, major and minor functional
release number and bug fix. First character.
nroPgmVer
nroPgmVer
nroPgmVer
nroPgmVer
id[1]
UBYTE, 67 = C
UBYTE, 85 = U
UBYTE, 50 = 2
UBYTE, 0 to 255
Second character.
Third character.
Fourth character.
id[2]
id[3]
major_ver
Major Functional Release Number:
1. Add or delete a network variable (NV), nv field.
2. Change the name of a nv or nv field.
3. Range or type (short / long) of data in a nv field is changed.
4. Enumerated value list of a nv field is changed.
NOTE: Algorithm changes or bug fixes may also be included.
nroPgmVer
minor_ver
UBYTE, 0 to 255
Minor Functional Release Number:
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C4. Output Variables for Excel 10 FCU Controllers.
digital
state
or
engineering units:
English (metric) or states plus
range
NV name
field name
default
comments
value
1. Network variables are unchanged.
(continued)
2. Functionality of the control algorithm has been revised and
affects compatibility with other nodes or the equipment being
controlled.
nroPgmVer
nroPgmVer
3. The network interface or physical input / output subsystem
was revised and affects compatibility with other nodes.
NOTE: Bug fixes may also be included in a minor functional
release.
bug_ver
UBYTE, 0 to 255
Bug Fix Number:
Network variables are unchanged. A change to the algorithm,
network interface, or physical input/output subsystem was made
that does not affect compatibility with other nodes or the equipment
controlled by the node.
nroPgmVer
node_type
UBYTE, 10 = FCU2
Node type number.
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table C5. Unused Variables for Excel 10 FCU Controllers
digital
state
or
engineering units:
English (metric) or states
plus range
NV name
field name
default
comments
value
nciApplVer
not_used1
UBYTE
Reserved for future use.
Reserved for future use.
Reserved for future use.
Reserved for future use.
Reserved for future use.
Reserved for future use.
Not used.
nciApplVer
nciCntrlSettings
nciFcuConfig
nciWallMod
nciWallMod
nvoFcuStatus
nvoFcuStatus
nvoFcuStatusP
nvoFcuStatusP
nvoSensor
nvoStatus
not_used2
UBYTE
reserve
7 bits
not_used
4 bits
spare_field[0]
spare_field[1]
not_used
UBYTE
UBYTE
3 bits
spare_field[0]
not_used
WORD
Not used.
Same as nvoFcuStatus
Not used.
spare_field[0]
not_used
Same as nvoFcuStatus
Not used
6 bits
Reserved for future use.
Not supported
out_of_limits
open_circuit
out_of_service
mechanical_fault
feedback_failure
over_range
Bit
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
under_range
electrical_fault
unable_to_measure
fail_self_test
self_test_in_progress
Lock ed_out
manual_control
in_override
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
Bit
Not supported
nvoStatus
reserved1
Bit
Not supported
nvoStatus
reserved2
Bit
Not supported
nvoUnitStatus
econ_output
SNVT_lev_percent
Not supported
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative:
Automation and Control Solutions
Honeywell GmbH
Böblinger Strasse 17
71101 Schönaich
Germany
Phone: (49) 7031 63701
Fax:
(49) 7031 637493
Subject to change without notice. Printed in Germany
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