GE Fanuc Automation
Programmable Control Products
Series 90™-30
PROFIBUS Slave Module
User's Manual
GFK-2193A
August 2004
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Contents
Overview and Specifications........................................................................................ 1-1
PROFIBUS Information................................................................................................... 1-1
Related Publications....................................................................................................... 1-1
IC693PBS201 Slave Module Specifications.................................................................. 1-2
PROFIBUS Basics........................................................................................................... 1-3
PROFIBUS Network Overview.......................................................................................... 1-3
Bus Communication.......................................................................................................... 1-3
Network Topology ............................................................................................................. 1-4
Network Connectors.......................................................................................................... 1-5
Installation ..................................................................................................................... 2-1
Reviewing System Power Requirements...................................................................... 2-1
Installing the PROFIBUS Module in the PLC Rack ...................................................... 2-1
Connecting the Slave to the PROFIBUS Network........................................................ 2-2
Network Segment Length.................................................................................................. 2-2
PROFIBUS Cable Types................................................................................................... 2-3
Network Termination......................................................................................................... 2-3
Network Baud Rate........................................................................................................... 2-4
Removing the Module from the Rack............................................................................ 2-4
Configuration................................................................................................................. 3-1
Adding a PROFIBUS Slave Module to the Hardware Configuration.......................... 3-1
Configuring a PROFIBUS Slave Module....................................................................... 3-2
Settings Tab ...................................................................................................................... 3-2
Input Data Area Tab.......................................................................................................... 3-3
Output Data Area Tab....................................................................................................... 3-4
Power Consumption Tab................................................................................................... 3-4
Status and Diagnostics................................................................................................. 4-1
PROFIBUS Slave Module LED Indicators..................................................................... 4-1
Status/Firmware ID Array ............................................................................................... 4-2
Word 1 – Slave Status Word............................................................................................. 4-2
Network Parameter Errors ................................................................................................ 4-2
Communication Requests.............................................................................................. 4-3
COMMREQ Ladder Instruction ......................................................................................... 4-3
Operation of the Communications Request ............................................................... 4-4
COMMREQ Programming Requirements and Recommendations............................ 4-5
Error Detection and Handling ..................................................................................... 4-5
Corrective Actions for COMMREQ Errors..................................................... 4-5
COMMREQ Status Word............................................................................... 4-6
PROFIBUS Slave Module COMMREQ Reference......................................................... 4-7
Get Slave Status COMMREQ (3)...................................................................................... 4-7
Memory Types............................................................................................................ 4-7
GFK-2193A
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Contents
Get Slave Status Command Block – Basic Example ................................................. 4-7
Get Slave Status - Reply Data Format ....................................................................... 4-8
Network Parameter Errors.......................................................................................... 4-9
Read Module Header (5)................................................................................................. 4-10
Read Module Header Command Block – Basic Example........................................ 4-10
Read Module Header Reply Data Format for Slave................................................. 4-11
Clear Counters (6)........................................................................................................... 4-12
Clear Counters Command Block – Basic Example.................................................. 4-12
Clear Counters Reply Data Format .......................................................................... 4-12
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Series 90™-30 PROFIBUS Slave Module User's Manual –August 2004
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Overview and Specifications
Chapter
1
This manual provides instructions for installing, programming, and troubleshooting control
systems that use the Series 90-30 PROFIBUS slave module, IC693PBS201. It is
assumed that you have a basic understanding of Series 90-30 PLCs and are familiar with
PROFIBUS-DP protocol.
The Series 90-30 PROFIBUS Slave module enables a Series 90-30 CPU to be a slave on
a PROFIBUS DP network and to communicate with a PROFIBUS DP master. It operates
as a slave on the network, automatically exchanging data with a master device. The slave
module has no bus access rights. It can only acknowledge received messages or transmit
messages to a master upon request. Its features include:
ꢀ
ability to read up to 244 bytes of input data from the network, and send up to 244
bytes of output data
ꢀ
ꢀ
ꢀ
support for all standard PROFIBUS data rates
PROFIBUS-compliant Module and Network Status LEDs
an RS-232 serial port (the Service port) for upgrading the firmware
PROFIBUS Information
Please refer to the following sources for PROFIBUS information:
ꢀ
PROFIBUS standard DIN 19245 parts 1 (low-level protocol and electrical
characteristics) and 3 (DP protocol)
ꢀ
ꢀ
ꢀ
European standard EN 50170
ET 200 Distributed I/O system, 6ES5 998-3ES22
IEEE 518 Guide for the Installation of Electrical Equipment to Minimize Electrical
Noise Input to Controllers
Related Publications
Series 90-30 PROFIBUS Master Module User’s Manual, GFK-2121
Series 90-30 Installation and Hardware Manual, GFK-0356.
Series 90-30/20/Micro PLC CPU Instruction Set Reference Manual, GFK-0467
Proficy™ Machine Edition Getting Started, GFK-1868
Proficy Machine Edition Logic Developer-PLC Getting Started Guide, GFK-1918
GFK-2121A
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1
SYS
1
2
3
COM
PROFIBUS DP
SLAVE
Key
System (SYS) and Communications (COM)
indicators
SERVICE RS232
1
LEDs
RS232, 9-pin male, D-Shell Connector. Used
for module firmware upgrades.
Service Port
2
3
5-IGND
4
3-TxD
2-RxD
PROFIBUS
Port
9-pin female D-Shell Connector. Used for
connecting to a PROFIBUS network.
Label on side of module contains catalog
number, description, standard conformance,
and serial number information
Label (not
shown)
4
PROFIBUS
5-IGND
8-A
3-B
1-SHLD
IC693PBS201
PROFIBUS
Slave Module
Figure 1-1. PROFIBUS Slave Module
IC693PBS201 Slave Module Specifications
Catalog number
IC693PBS201
Description
Series 90-30 Slave module for PROFIBUS DP networks
Configuration software
requirement
Requires Proficy Machine Edition Logic Developer version 2.6 or later
CPU version
requirement
Requires CPU firmware version 8.00 or later
Mounting location
Can reside in any Series 90-30 baseplate (CPU, expansion, or remote)
slot except for slot 1 of a modular CPU baseplate
Environment
Storage temperature = –40°C to 85°C
Operating temperature = 0°C to 60°C
Backplane current
consumption
450 mA at 5VDC (typical)
Data rates
Supports all standard Data Rates (9.6KBps, 19.2KBps, 93.75KBps,
187.5KBps, 500KBps, 1.5Mbps, 3MBps, 6MBps and 12MBps)
Status information
Slave Status Word
Firmware module revision
Note: The PROFIBUS Slave module does not support Sync and Freeze modes
1-2
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1
PROFIBUS Basics
PROFIBUS Network Overview
•
•
•
PROFIBUS is an open, vendor independent FieldBus standard for a wide range of
applications in industrial automation, including motion control.
PROFIBUS is a dynamic technology that grows functionally while complying with the
European FieldBus Standard EN 50 170.
PROFIBUS Guidelines and Profiles provide the means for further technical
development based on the ever-changing communication requirements of the
networks, systems, and devices used in today's industrial automation applications.
PROFIBUS specifications reference three different protocols to cover a range of industrial
requirements:
•
PROFIBUS-DP
High speed data communication. DP stands for Decentralized
Periphery. In practice, the majority of slave applications are DP applications.
•
PROFIBUS-FMS Object oriented general-purpose data communication. FMS
stands for FieldBus Message Specification. FMS protocol devices may exchange data
on the same bus used for DP devices.
•
PROFIBUS-PA
Meets requirements for intrinsic safety and non-intrinsic safety
areas and includes bus powered field devices.
Note: The PROFIBUS logo is a registered trademark of the PROFIBUS International
Organization. Membership in the organization is open to all individuals,
companies and organizations. More information about the organization and the
Bus Communication
The PROFIBUS specification defines the technical characteristics of a serial field bus
system that links distributed digital controllers on the network, from field level to cell level.
PROFIBUS is a multi-master system that allows the joint operation of several automation,
engineering or visualization systems with their distributed peripherals on one bus.
PROFIBUS distinguishes between the following types of devices:
•
Master devices determine the data communication on the bus. A master can send
messages without an external request when it holds the bus access rights (the token).
Masters are also called active stations.
•
Slave devices include motion controllers, drives, I/O devices, valves, and
transducers. Slaves do not have bus access rights and can only acknowledge
received messages or send messages to the master when requested to do so. Slave
devices are passive stations and require only small portions of the bus protocol.
The majority of PROFIBUS-DP applications are located at the field level. The field level
typically includes slave devices such as the S2K motion controller station and host
devices like PLC or PC control systems for the PROFIBUS-DP master station. Operator
interfaces and DCS type systems usually operate at the cell level.
GFK-2121A
Chapter 1 Overview and Specifications
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1
Data bandwidth Demands on PROFIBUS Communications Systems
Amount of Data
Transmission
Duration
Transmission
Frequency
Management level
Cell level
Mbytes
Hours/Minutes
Day/Shift
Kbytes
Bytes
Seconds
Hours/Minutes
Field Level
Several 100
10 to 100 milliseconds
microseconds to 100
milliseconds
Actuator sensor level
Bits
Microseconds to
milliseconds
Milliseconds
Network Topology
A PROFIBUS-DP network may have up to 127 stations (address 0-126), however address
126 is reserved for commissioning purposes. The bus system must be sub-divided into
individual segments to handle this many participants. These segments are linked by
repeaters. The function of a repeater is to condition the serial signal to allow connection of
segments. In practice, both regenerating and non-regenerating repeaters may be used.
Regenerating repeaters actually condition the signal to allow increased range of the bus.
Up to 32 stations are allowed per segment and the repeater counts as a station address.
A specialized “link” segment consisting only of optical fiber modem repeaters may be used
to span long distances. Plastic fiber optic segments are typically 50 meters or less while
glass fiber, optic segments may extend several kilometers.
The user assigns a unique PROFIBUS station address to identify each master, slave, or
repeater in the entire network. Each participant on the bus must have a unique station
address.
1-4
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1
Repeater
Connecting
Segments
Remote
Repeate
Participant
Participant
Participant
Participant
Participant
Link Segment
(No Participants)
Termination
Participant
Branch
Segment
Remote
Repeater
Termination
To additional
participants
Figure 1-2. Repeaters and bus termination
Network Connectors
PROFIBUS connections are created with a 9 pin sub-D connector. A minimum connection
consists of a shielded twisted-pair cable (shield to pin 1 and twisted-pair wires to pins 3
and 8) with terminating connections in the appropriate bus plugs. The pin to signal
conventions are described below.
Pin-out Listing for the PROFIBUS Bus Plug Connector
Pin No.
Signal
Shield
Designation
Shield / Protective Ground
1
2
3
4
5
6
7
8
9
M24
Ground / Common of the 24V output voltage
Receive data / transmission data plus
Control signal for repeaters (direction control)
Data transmission potential (ground to 5V)
Supply voltage of the terminating resistance (+ 5V)
Output voltage (+ 24V)
RxD/TxD-P
CNTR-P
DGND
VP
P24
RxD/TxD-N
CNTR-N
Receive data / transmission data negative
Control signal for repeaters (direction control)
Note: For information on network segment length, network connectors and network
termination, and network baud rate, refer to Chapter 2, “Installation.”
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Installation
Chapter
2
This chapter contains information on the following procedures:
ꢀ
ꢀ
ꢀ
ꢀ
Reviewing system power requirements
Installing the PROFIBUS module in the PLC rack
Installing PROFIBUS wiring
Connecting the Slave to the PROFIBUS network
ꢁ
ꢁ
ꢁ
Selecting the proper line type
PROFIBUS cable types
Installing bus termination
Reviewing System Power Requirements
Review the power requirements of your system to ensure that your power supply has
sufficient capacity to support the PROFIBUS Slave module. Power supply load is
automatically calculated by the CIMPLICITY Machine Edition configuration software.
Details on manually calculating power supply load can be found in the Series 90-30
Installation and Hardware Manual, GFK-0356.
Note: High capacity Series 90-30 power supplies IC693PWR330 or IC693PWR331 are
recommended, particularly for systems with CPU350 or higher, or that have
Ethernet adapters and/or multiple PROFIBUS modules. The Series 90-30
PROFIBUS Slave module consumes 450mA at 5VDC (typical).
Installing the PROFIBUS Module in the PLC Rack
1. Remove power from Series 90-30 rack.
2. Turn off power to rack.
3. Place the module into slot 1 or higher in the rack (slot 2 or higher in the Main
rack) by hooking the top of the module on the notch above the slot and slowly
lowering the module until it snaps into place.
4. Attach the PROFIBUS cable and terminate as required.
Note: For details about installing Series 90-30 rack systems and modules, refer to the
Series 90-30 Installation Manual and Hardware Manual, GFK-0356.
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2
Connecting the Slave to the PROFIBUS Network
Network Segment Length
A PROFIBUS network uses either fiber optic or RS-485 copper media. The copper bus
line specified in EN 50 170 is “Line Type A” and is the recommended cable type. A more
economical copper cable “Line Type B” is commonly used for smaller installations;
however, it is not specified in EN 50 170. It is extremely important to use cable rated to
PROFIBUS specifications. The higher the baud rate selected and the longer the distances
involved, the more critical cable selection becomes. (PROFIBUS cable has a distinctive
purple color.)
Stub or “T” type branch connections are supported if the total stub (branch) lengths do not
exceed 6.6 meters. Do not use stubs at all on 12 Mbaud networks.
The data rates for network communication with maximum segment trunk length per cable
type are provided below. Multiple segments may be connected via repeater stations to
extend the total bus length.
Line Types
Baud Rate
Line A
Line B
Glass Fiber
Distance (Max) 1, 2 Distance (Max) 1, 2
9.6KBps, 19.2KBps and 93.75KBps
187.5KBps
1200 m
1000 m
400 m
200 m
100 m
1200 m
600 m
200 m
NA
6Km
6Km
6Km
6Km
6Km
500KBps
1.5MBps
3, 6 and 12MBps
NA
1
2
If using a combination of both line types, divide the lengths shown by two.
Values shown are the sum of all bus segment and drop cable lengths.
NA = Not Applicable
Note: The two physical ends of the PROFIBUS network should be terminated. There
should be two, and only two, terminators on a network.
2-2
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2
PROFIBUS Cable Types
The recommended cable is
ꢀ
Belden 3079A PROFIBUS Cable
This is a shielded, 150 ohm twinaxial (single twisted pair) cable. It has 22 AWG
conductors and a mutual capacitance of 9.0 pF per foot, nominal. For complete
specifications on this cable, please contact your Belden dealer or visit their website at
Alternate cable types are:
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
Siemens 6XV1 830-OAH10 Two Core shielded
Siemens 6XV1 830-OBH10 w/PE Sheath
Siemens 6XV1 830-3AH10 for underground burial
Siemens 6XV1 830-3BH10 trailing cable
Bosch Comnet DP #913 548 Flexible PROFIBUS cable
Bosch Comnet DP #917 201 Trailing PROFIBUS Cable
Bosch Comnet DP #917 202 Massive PROFIBUS Cable
Note: Allen Bradley “blue hose,” which has an impedance of 78 ohms, is not
recommended for this application.
Network Termination
Termination resistors are needed, as defined in DIN 19245 Part 1 section 3.1.2.5.
Master
Slave
Slave
Slave
Slave
Slave
Termination Required
(Segment 1)
One terminator must be applied at each end of a network segment.
Repeater
Master
Slave
Slave
Slave
Slave
Slave
Termination Required
(Segment 2)
Termination Required
(Segment 1)
Generally, termination is provided in commercially-available PROFIBUS standard network
connectors. Some connector vendors provide termination capability in the connector and
a switch on the connector to enable/disable termination. Some connector vendors provide
both terminated and unterminated connectors.
GFK-2193A
Chapter 2 Installation
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2
Note: For proper network termination, it is essential that the terminating devices
maintain power. Power is provided by the device on Pin 6 and Ground on Pin 5. If power
is lost to either terminating device, the network may not operate correctly. Generally, the
lone network master device is one of the terminating devices. Therefore, a loss of power
to the network master renders the network inoperable anyway. The other terminating
device may be a critical slave device, which must maintain power, or a separately
powered, stand-alone terminator. These stand-alone devices are commercially available.
VP (6)
Ru = 390 Ohms
RxD/TxD-P (3)
Rt = 220 Ohms
RxD/TxD-N (8)
Rd = 390 Ohms
DGND (5)
Figure 2-1. Bus Termination for Type A Cable in Accordance to PROFIBUS Specifications
In addition to the termination shown above, the following compensation should be added
for 12 Mbit bus technology:
5
9
110nH
110nH
110nH
110nH
4
3
2
1
8
7
6
To/from
another
node
To/from
another
node
Network Baud Rate
The master configures the appropriate network baud rate for each station on the network.
Typical baud rate values are: 9.6KBps; 19.2KBps; 45.45KBps; 93.75KBps; 187.5KBps;
500KBps; 1.5MBps; 3MBps; 6MBps; or 12MBps. For details on using the configuration
software, refer to chapter 3.
Removing the Module from the Rack
The following procedure describes how to remove the GE Fanuc Series 90-30 master:
1. Turn off power to rack.
2. Remove all cabling from the module.
3. Press the release latch located on the bottom of the module and slowly raise the
module from the bottom until it comes out of the slot.
2-4
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Configuration
Chapter
3
These configuration procedures are intended for users with at least a basic knowledge of
the CIMPLICITY Machine Edition Logic Developer software and the Series 90-30 PLC.
For help with using the software, please see the software’s built-in help system.
Note: The PROFIBUS Slave is supported only in Machine Edition Logic Developer-PLC.
Adding a PROFIBUS Slave Module to the Hardware Configuration
Add the IC693PBS201 module to the PLC rack configuration.
1. In the
folder.
Project tab of the Navigator, expand the
Hardware Configuration
2. In the Hardware Configuration folder, right click the PLC Slot where you wish to install
the PROFIBUS Slave module. Note that a PROFIBUS module is not a valid choice for
slot 1 of a modular CPU rack.
3. Select Add Module from the shortcut menu. The Module Catalog dialog box appears.
Note: To edit a module that already appears in the rack, right click the module and
select Configure. The module’s Parameter Editor window opens.
4. Click the Communications tab. The Communications module list appears.
5. Select the IC693PBS201 PROFIBUS Slave and click the OK button. The module is
added to the PLC configuration in the Navigator window, and the module’s Parameter
Editor window appears in the InfoViewer window space.
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3
Configuring a PROFIBUS Slave Module
The PROFIBUS Slave module has four Parameters tabs: Settings, Input Data Area,
Output Data Area, and Power Consumption.
Settings Tab
Station
The Slave module’s station number that is used on the PROFIBUS network. Can be in the range
from 1 to 125. Each module on a network should be given a unique station number. Default is 1.
Note that the Master is commonly assigned to Station 0 (zero).
Baud Rate
Specifies the data transmission rate for the PROFIBUS Slave module in bits/second (bps).
Values: 9.6Kbps, 19.2KBps, 93.75KBps, 187.5KBps, 500KBps, 1.5MBps, 3MBps, 6Mbps,
12MBps
Default: 1.5MBps
Note: The Horner PROFIBUS Slave module, HE693PBS105, does not have this setting. If you are converting from a
Horner module to a Series 90-30 IC693PBS201 PROFIBUS Slave module, you will need to set this parameter.
Status/Firmware
ID Address
This is the starting address for this two-word array. Status/Firmware ID Address is a consumed
range and as such must be a non-overlapping range in %AI, %I, %Q, %G, %AQ, %R, %T, or
%M. Defaults to %AI memory.
The Status word provides information about the status of the PBS201 module to the PLC
CPU. For more information, see “Get Slave Status Reply Data Format” in chapter 4.
The Firmware ID word contains the current firmware version running on the PBS201. The
Major Revision number resides in the upper byte and the Minor Revision number resides in
the lower byte of this word.
Tip:
Use the Communication Request (COMMREQ) task 3 (GetSlaveStatus) to retrieve the information that is
reported in this memory area. (This COMMREQ is sent from the CPU of the PLC where the Slave module
resides.)
Length
Always two words. (A value of 2 for register memories and 32 for discrete memories.)
Inputs on Loss of
Master
Determines what values are used for the data received by the module from the master (inputs to
the Slave module/outputs from the master) if communication with the master is lost.
Choices are:
Hold Last State (default) – Until communication resumes and new values are received, each
input will have the value that it had when communication was lost.
Clear – Until communication resumes and new values are received, each input will have a
value of 0.
3-2
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3
Input Data Area Tab
The input data area describes data received over the network by the Slave module from
the PROFIBUS Master. These inputs are mapped, using the Input Data Area tab, into
specific memory locations in the PLC where the Slave module resides.
PROFIBUS Slave Module’s Input Data Area Parameters
Area
Type
A read-only identifier for the row. Valid range: 1 to 32.
Data type of area being defined. Valid types are Digital In, Analog In, and Empty. The default value is
Empty.
Size
Describes the size of the data area on the network. Set to 0 and read-only if Type is set to Empty. Valid
ranges:
If Type is set to Analog In (Word): 1—122
If Type is set to Digital In (Byte): 1—244
Notes: The total number of input bytes for all entries cannot exceed 244.
A value of 0 sets Type to Empty.
Units
This read-only field gives the units for the Type specified.
If Type is set to Empty or Digital In: Byte
If Type is set to Analog In: Word
Ref
Address
Location in PLC memory where the received data is mapped. This field is read-only if Size is set to 0. This
is a consumed range and must be a non-overlapping range in %AI, %I, %Q, %G, %AQ, %R, %T or %M. If
Type is set to Digital In and the number of bytes (Size) is odd, an address in discrete memory must be
used: %I, %Q, %G, %M, or %T.
Default:
For Digital In, next available address in %I
For Analog In, next available address in %AI
The length of the reference mapped to the area. Allowable ranges:
For discrete memories (in bits), 0, 8, 16 ... X
For register memories (in words), 0, 1, 2 ... X
Length
where X is the required length to hold the entire data area. The default value is the space required to map
bytes specified by the entries in Type and Size.
Note: If an input data area is defined (Type and Size are specified) but Length is set to 0, data received by the Slave
is ignored.
GFK-2193A
Chapter 3 Configuration
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3
Output Data Area Tab
The output data area describes data sent over the network by the Slave module to the
PROFIBUS Master. These outputs are mapped, using the Output Data Area tab, from
specific memory locations in the PLC where the Slave module resides.
Area
Type
Read-only identifier for the row. Valid range: 1-32.
Data type of area being defined. Valid types are Digital Out, Analog Out, and Empty. The default value is
Empty.
Size
Describes the size of the data area on the network. Set to 0 and read-only if Type is set to Empty. Valid
ranges:
If Type is set to Digital Out (Byte): 0—244
If Type is set to Analog Out (Word): 0—122
Note: The total number of output bytes for all entries cannot exceed 244.
Units
This read-only field gives the units for the Type specified.
If Type is set to Empty or Digital Out: Byte
If Type is set to Analog Out: Word
Ref
Location in PLC memory where the data to be sent is mapped. This field is read-only if Size is set to 0.
Address
This is a produced range and can be any range in %AI, %I, %Q, %G, %AQ, %R, %T, or %M. If Type is
Digital Out and the number of bytes (Size) is odd, an address in discrete memory must be used: %I, %Q,
%G, %M, or %T. Overlaps with another produced range are not considered fatal and can be included in a
valid configuration.
Default: For Digital Out, next available address in %Q
For Analog Out, next available address in %AQ
Length
The length of the reference mapped to the area.
Allowable ranges:For discrete memories: 0, 8, 16 ... X
For register memories: 0, 1, 2 ... X
where X is the required length to hold the entire data area. The default value is the space required to map
bytes specified by the entries in Type and Size.
Note: If an output data area is defined (Type and Size are specified) but Length is set to 0, a value of 0 is sent to the
Master for that data area.
Power Consumption Tab
The information in this tab is read-only. It displays the power consumed by the module
from the PLC backplane.
3-4
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Status and Diagnostics
Chapter
4
The following methods can be used to obtain status and diagnostic data:
ꢀ
Observing and interpreting the LED indicators on the PROFIBUS module, described
below
ꢀ
ꢀ
Monitoring the Status/Firmware ID Array, page 4-2
Using Communications Request (COMMREQ) ladder logic instructions to instruct the
PROFIBUS module to gather diagnostic or status data and report it to the PLC CPU,
page 4-3
Note: The PROFIBUS Slave Module does not generate faults for the Fault Table.
PROFIBUS Slave Module LED Indicators
SYS
SYS LED
COM
LED
Indicators
Color
Indication
PROFIBUS DP
Red
The Slave is not being scanned or is faulted.
The Slave is being scanned in Stop mode.
The Slave is being scanned in Run mode.
SLAVE
SERVICE RS232
Amber
Green
5-IGND
Flashing Green
This LED flashes green for two seconds at system
startup
3-TxD
2-RxD
Off
PROFIBUS Slave is not configured
PROFIBUS
5-IGND
COM LED
8-A
3-B
The PROFIBUS slave does not use the COM LED, except when loading firmware.
This LED is normally off.
1-SHLD
Flashing Green – PROFIBUS Slave is not configured
Note: When loading firmware, the module is placed in the System Configuration mode.
When in this mode, the COM and SYS LEDs flash red alternately.
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Status/Firmware ID Array
The starting reference address for this two-word array is set in the PROFIBUS Slave
software configuration. For details, see “Parameters” in chapter 3.
Word Name Description
1
Slave Status This word contains the slave status code. The status can be read using the
Get Slave Status COMMREQ (task 3), described on page 4-7. .
2
Firmware ID
Current firmware version running on the Slave module. The Major Revision
number resides in the upper byte and the Minor Revision number resides
in the lower byte of this word.
Word 1 – Slave Status Word
Bits
Meaning
Value
15—12
Baud Rate
(bps)
0=12MBps, 1=6MBps, 2=3MBps, 3=1.5MBps, 4=500KBps,
5=187.5KBps, 6=93.75Bps, 8=19.2KBps, 9=9.6KBps
11—10
Module State
0=Module is waiting for parameters from Master
1=Module is waiting for configuration from Master
2=Data Exchange is occurring – normal operation
3=Error (either configuration error or module watchdog timeout)
1=Online module firmware is running
9
8
7
On-line
0=Offline
PLC Cfg
Run/Stop
0= Module configuration from PLC CPU is bad
1=Module configuration from PLC CPU is good
0=Stop, 1=Run. This is the state of the PROFIBUS module; it is not the
status of the PLC CPU. If the SYS LED is Green the bit=1, if the SYS
LED is Red or Amber the bit=0
6—0
Error Info
See “Network Parameter Errors”
Network Parameter Errors
The following errors codes may be returned in bits 0—6 in the Slave Status word.
Note: The error code is the numerical value of the bits.
Error
Code
Meaning
0
1
2
3
No error
ID from master does not match Slave ID
Ready Time from Master does not match Slave Ready time
Master is requesting Freeze or Sync, which is not supported
by the slave
4
5
6
Length of data from master to slave is incorrect
Length of data from slave to master is incorrect
One of the watchdog factors (SlvWdFact1 or SlvWdFact2)
from the master was 0.
7
8
Slave watchdog time out (check response timeout)
Slave timeout watchdog disabled from master
4-2
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Communication Requests
The Communications Request uses the parameters of the COMMREQ Ladder Instruction
and an associated Command Block to define the characteristics of the request. An
associated Status Word reports the results of each request.
The Communication Request function (COMMREQ) allows the program to communicate
with a GE Fanuc intelligent module, such as a PROFIBUS slave module.
The COMMREQ function uses a command block that contains the data to be
communicated to the other device, plus information related to the execution of the
COMMREQ. The command block must be placed in the designated memory area using
data move instructions, such as MOVE or BLKMOV (Block Move).
The CPU reports the result of the COMMREQ in the status word, which is a single
location in PLC data memory. The status word address is specified in the command block.
For a list of status codes reported in the status word, see “COMMREQ Status Word” on
page 4-6.
The PROFIBUS slave module supports one COMMREQ, described on page 4-7.
COMMREQ Ladder Instruction
This discussion provides an overview of
the COMMREQ instruction. For details
of the COMMREQ ladder instruction,
refer to the online help provided with the
programming software. The
Communications Request begins when
the COMMREQ Ladder Instruction is
activated. The COMMREQ ladder
instruction has four inputs and one
output:
Enable Input
COMM_
REQ
Command Block Pointer
Rack/Slot Location
IN
FT
Fault Output
SYSID
TASK
Task #
Figure 4-1. COMMREQ Ladder Instruction
Enable Input: Must be Logic 1 to enable the COMMREQ Instruction. It is recommended that
the enabling logic be a contact from a transition (“one-shot”) coil.
IN: The memory location of the first word of the Command Block. It can be any valid
address in word-type memory (%R, %AI, or %AQ). For example, %R00100 at IN would
indicate that the starting address of the Command Block is %R00100.
SYSID: The rack and slot location of the module that the COMMREQ is targeting. The high
byte contains the rack number, and the low byte contains the slot number. The table
below shows some examples of SYSIDs:
SYSID Examples
Rack
Slot
Word Value
0
3
2
4
4
9
0004
0304
0209
TASK: Must be set to 1.
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FT Output: The function’s FT (fault) output can provide an output to optional logic that can
verify successful completion of the Communications Request. The FT output can have
these states:
FT Output Truth Table
Enable Input Status Does an Error Exist? FT output
Active
No
Low
High
Low
Active
Yes
Not active
No execution
ꢀ
The FT output is set High if:
The specified target address is not present (for example, specifying Rack
1 when the system only uses Rack 0).
The specified task number is not valid for the device.
Data length is set to 0.
ꢀ
The FT output can either be connected to another device, such as a set coil, or
can be left open.
Operation of the Communications Request
The figure below illustrates the flow of information between the PLC CPU and the
PROFIBUS Slave module:
PROFIBUS Slave
Module
PLC CPU
PLC
Backplane
Ladder
program
COMMREQ
Firmware
instructions
Command
Requested data
Status bits
PROFIBUS
network
•
to Master
On-board
memory
CPU
memory
Data
•
•
Status word
Figure 4-2. Operation of the PROFIBUS Communications Request
A Communications Request is initiated when a COMMREQ ladder instruction is activated
during the PLC scan. At this time, a command from the PLC via the Communications
Request is sent to the PROFIBUS Master module (PBM).
At the conclusion of every request, the PLC CPU reports the status of the request to the
Status Word, which is a location in PLC memory that is designated by the Status Word
Pointer in the Command Block.
In Figure 4-2, the PBM is shown in the CPU rack and communications occur over the PLC
backplane. If the PBM is located in an expansion or remote rack, the commands and data
are sent over the CPU rack’s backplane, through the expansion or remote cable to the
rack containing the PBM, and across that rack’s backplane to the PBM.
4-4
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COMMREQ Programming Requirements and Recommendations
ꢀ
COMMREQ instructions should be enabled by a contact from a transition coil.
ꢀ
If using more than one COMMREQ in a ladder program, verify that a previous
COMMREQ executed successfully before executing another one. This can be done
by checking the Status Word and the FT (Fault) output.
ꢀ
The FT output is held False if the Enable Input is not active. This means that if the
COMMREQ is enabled by a transitional (one-shot) contact and a fault occurs, the FT
output is High for only one PLC scan. To capture the fact that a fault occurred, you
can program the fault output as a Set coil, which would not be automatically reset at
the end of a scan. Additional logic would then be needed to reset the fault output coil
after the fault is acknowledged and before the next execution of the COMMREQ.
ꢀ
ꢀ
Programming a device, such as a Set Coil, on the FT output of the COMMREQ is
optional; this output may be left open if desired.
It is necessary to initialize the data in the Command Block before executing the
COMMREQ instruction. Since the normal PLC sweep order is from top to bottom,
initializing the Command Block in an earlier rung (or rungs) than the rung that contains
the COMMREQ will satisfy this requirement.
Error Detection and Handling
As shown in “COMMREQ Status Word”, a value of 1 is returned to the Status Word if
communications proceed normally, but if any error condition is detected, a value greater
than 1 is returned. If you require error detection in your ladder program, you can use a
Greater Than (GT) compare instruction to determine if the value in the Status Word is
negative (less than zero). If an error occurs, the GT instruction’s output (Q) will go high. A
coil driven by the output can be used to enable fault handling or error reporting logic.
The FT output of the COMMREQ, described on page 4-4, goes high for certain faults and
can be used for fault detection also. Additionally, the first Status Word can be monitored
by error message logic for display on an Operator Interface device, in which case, Status
Word codes would correspond to appropriate error messages that would display on the
operator screen.
To dynamically check the Status Word, write a non-significant positive number (0 or 99
are typically used) into the Status Word each time before its associated COMMREQ is
executed. If the instruction executes successfully, the CPU will write the number 1 there.
This method lets you know that if the number 1 is present, the last COMMREQ executed
successfully, and that the 1 was not just left over from a previous execution.
When multiple COMMREQs are used, it is recommended that each be verified for
successful communications before the next is enabled. Monitoring the Status Word is one
way to accomplish this.
Corrective Actions for COMMREQ Errors
The type of corrective action to take depends upon the application. If an error occurs
during the startup or debugging stage of ladder development, you should verify the
COMMREQ parameters. The same is true if an error occurs right after a program is
modified. But, if an error occurs in a proven application that has been running
successfully, the problem is more likely to be hardware-related. The PLC fault tables
should be checked for possible additional information when troubleshooting Status Word
errors.
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COMMREQ Status Word
The following table defines the format of the Status Block used during the COMMREQ
handshake.
Status Word Format
Word
Name
Description
1
State
The state of the current COMMREQ request
(See “Status Word State
Codes” below.)
2
LostCommand
Command code of the last command lost when
the CRL bit is set in Flags.
3
4
ErrorCode
Not Used
AdditionalCode
Additional code for error reporting
Status Word State Codes
Value
Description
0
1
Module has not yet processed the COMMREQ
Command Complete
Note: This status does not necessarily mean success. Some commands have
reply data that must also be checked.
2
3
4
5
6
Command Terminated – module busy
Command Terminated – invalid command
Command Terminated – invalid command data
Command Terminated – not enough data
Command Terminated – command collision
An identical command, which has already reported completion, is currently being
processed and has not replied yet.
7
8
Command Terminated – not enough memory in reply area
The command did not specify sufficient PLC memory for the reply. Command will
be ignored.
Command Terminated – command-specific error. See ErrorCode and
AdditionalCode in the Status Block for more information.
9–255 Reserved
4-6
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PROFIBUS Slave Module COMMREQ Reference
The PROFIBUS Slave module supports the following COMMREQ tasks and responses.
Task
Name
Description
Page No.
3
5
6
Get Slave Status
Retrieves detailed status information for the Slave. 4-7
Read Module Header Retrieves module header information.
Clear Counters Clears counters in ReadModuleHeader
4-10
4-12
Get Slave Status COMMREQ (3)
The Get Slave Status COMMREQ retrieves detailed status information for the slave
module from the 16-bit slave status word. The starting address of this word is configured
as Status/Firmware ID Address in the PROFIBUS Slave module software configuration.
For details, refer to “Parameters” in chapter 3.
Memory Types
The following table lists the memory types that can be used for the Status Block and
Reply Data areas.
COMMREQ Status Word Memory Type Codes
Memory Type
Abbreviation
Decimal
code to enter
Memory Type
%I
%Q
%R
Discrete input table (BYTE mode)
Discrete output table (BYTE mode)
Register memory
16
18
8
%AI
%AQ
%T
Analog input table
10
12
20
22
Analog output table
Discrete temporary memory (BYTE)
Discrete internal memory (BYTE)
%M
Get Slave Status Command Block – Basic Example
Get Slave status for Device
Return the COMMREQ status words to %R10—%R13.
Return the Slave status to %R251-%R259.
Word
Dec (Hex)
Definition
Word 1
Word 2
Word 3
Word 4
Word 5
Word 6
Word 7
Word 8
Word 9
Word 10
4 (0004)
0 (0000)
8 (0008)
9 (0009)
0 (0000)
0 (0000)
3 (0003)
8 (0008)
250 (00FA)
5 (0005)
Length of command Data Block
Always 0 (no-wait mode request)
Memory type of COMMREQ status word (%R)
COMMREQ status word address minus 1 (%R10)
Reserved
Reserved
Get Module Status command code.
Memory type to write response (%R)
Starting Address to write response (response written to %R251)
Maximum size of response area. Must be 2 words or more, or an error
will be reported in the COMMREQ status and the Get Slave Status
request will be ignored.
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(Word 7) Command Code: Word 7 specifies the Command code for the COMMREQ to
be executed. Get Slave Status = 3.
(Word 8) Local PLC - Memory Type: Words 8—9 specify the location in the PLC where
the response will be written. Valid values for Word 8 are listed on page 4-7.
(Word 9) Local PLC - Memory Starting Address: Word 9 determines the starting
address in the local PLC in which the response is to be written. The value entered is the
offset (0-based) from the beginning of PLC memory for the memory type and mode
specified in Word 8. This offset will be either in bits, bytes, or words depending on the
mode specified (for example, if Word 8=16 and Word 9=2, the starting address will be
%I9). Valid ranges of values depend on the PLC’s memory ranges.
(Word 10) Response Memory Size: Words 10 specifies the size of the memory block for
the response. (Must be at least 2 words.)
Get Slave Status - Reply Data Format
Word
Name
Description
Word 1
Command Code
Echo of Command code that this data block is replying
to. (0x0003)
Word 2
Status Code
See Word 2 formats in table below
Word 3—10
Reserved for Future
Use
Word 10 of the command block should specify a
minimum of 5 words to accommodate possible future
use of this space.
Note: The reply from Get Slave Status contains the same information that is provided to
the PLC CPU in the Status/Firmware ID Address. This parameter is defined when
the module is configured in the PLC hardware configuration.
Word 2 – Status Code
Bit
Meaning
Value
15—12
Baud Rate (bps)
0=12MBps, 1=6MBps, 2=3MBps, 3=1.5MBps,
4=500KBps, 5=187.5KBps, 6=93.75Bps, 8=19.2KBps,
9=9.6KBps
11—10
Module State
0=Module is waiting for parameters from Master
1=Module is waiting for config from Master
2=Data Exchange is occurring – normal operation
3=Error (either config error or module watchdog
timeout)
9
8
7
On-line
1=Online module firmware is running
0=Offline
PLC Cfg
Run/Stop
0= Module config from PLC CPU is bad
1=Module config from PLC CPU is good
0=Stop, 1=Run This is the State of the PROFIBUS
Module, it is not the status of the PLC CPU. If the SYS
LED is Green the bit=1, if the SYS LED is Red or
Amber the bit=0
6—0
Error Info
See “Network Parameter Errors”
4-8
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Network Parameter Errors
The following errors codes may be returned in bits 0—6 in the Get Slave Status reply.
Note: The error code is the numerical value of the bits.
Error
Code
Meaning
0
1
2
3
No error
ID from master does not match Slave ID
Ready Time from Master does not match Slave Ready time
Master is requesting Freeze or Sync, which is not supported
by the slave
4
5
6
Length of data from master to slave is incorrect
Length of data from slave to master is incorrect
One of the watchdog factors (SlvWdFact1 or SlvWdFact2)
from the master was 0.
7
8
Slave watchdog time out (check response timeout)
Slave timeout watchdog disabled from master
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Read Module Header (5)
The Read Module Header command retrieves Network Diagnostic Information for the
Device.
Read Module Header Command Block – Basic Example
The following command block accomplishes the following:
Get Module Header Data
Return the COMMREQ Status Word to %R10—%R13.
Return the Device Status to %R251—%R275.
Word Dec (Hex)
Definition
Length of command Data Block
Word 1
Word 2
Word 3
Word 4
Word 5
Word 6
Word 7
Word 8
4 (0004)
0 (0000)
8 (0008)
9 (0009)
0 (0000)
0 (0000)
5 (0005)
8 (0008)
Always 0 (no-wait mode request)
Memory type of COMMREQ status word (%R)
COMMREQ status word address minus 1 (%R10)
Reserved
Reserved
Read Module Header command number
Memory type to write response (%R)
Word 9 250 (00FA) Starting Address to write response(response written to %R251)
Word 10 25 (0019) Size of response area, 25 for slave
(Word 7) Command Code: Word 7 specifies the Command code for the COMMREQ to
be executed . Read Module Header = 5
(Word 8) Local PLC - Memory Type: Words 8—9 specify the location in the PLC where
the response will be written. Valid values for Word 8 are listed below:
Value
Type Dec (Hex)
Description
%R 8 (0008)
Register memory (word mode)
%AI 10 (000A)
%AQ 12 (000C)
Analog input memory (word mode)
Analog output memory (word mode)
Discrete input memory (byte mode)
Discrete output memory (byte mode)
Discrete temporary memory (byte mode)
Discrete momentary internal memory (byte mode)
%I
16 (0010)
18 (0012)
20 (0014)
22 (0016)
%Q
%T
%M
4-10
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(Word 9) Local PLC - Memory Starting Address: Word 9 determines the starting
address in the local PLC in which the response is to be written. The value entered is the
offset (0-based) from the beginning of PLC memory for the memory type and mode
specified in Word 8. This offset will be either in bits, bytes, or words depending on the
mode specified (for example, if Word 8=16 and Word 9=2, the starting address will be
%I9). Valid ranges of values depend on the PLC’s memory ranges.
(Word 10) Response Memory Size: Word 10 specifies the size of the memory block for
the response. The Response Memory Size is 25 words. If the Response Memory Size is
set smaller than 25, the COMMREQ will fail with a 7 in the COMMREQ Status Word. The
user is responsible for assuring that this area is large enough to contain the requested
data without overwriting other application data
Read Module Header Reply Data Format for Slave
Word
Name
Description
Word 1
Command Code
Echo of the Command Code that this data block is replying to
(0x0005).
Word 2
Word 3
Word 4
ModuleType
PfbStatus
Contains 1 if the module is a Slave and a 2 if the module is a
Master.
PROFIBUS Status register, also can be read using the Get
Device Status COMMREQ. For definitions, see page 4-8.
ModuleVersion
Module firmware version.
0122h = 1.22
Word 5
ErrLanOffline
DiagConf
Counter. LAN went offline due to errors.
Total confirmations.
Word 6
Word 7
DiagInd
Total indications.
Word 8
ErrNotOk
Total not OK confirmations and indications.
Number of updates the Slave has received from the Master
Count of Slave Configuration Errors
Count of Slave Watchdog timeouts (update not received in time)
Invalid request length error counter.
FIFO overflow error counter.
Word 9
DiagSlaveUpdate
ErrSlvErr
Word 10
Word 11
Word 9
ErrSlvTout
ErrInvReqLen
ErrFifo
Word 10
Word 11
Word 12
Word 13
Word 14
Word 15
Word 16
Word 17
Word 18
Word 19
Word 20
Word 21
Word 22
ErrRxOverun
ErrDblTok
ErrRespErr
ErrSynErr
ErrNetTout
ErrHsa
Receive overrun error counter.
Double token error counter.
Response error counter.
General network error counter.
Network timeout error counter.
Station higher than HAS was heard counter.
Duplicate station detected counter.
Unable to pass token counter.
Active station list is invalid.
ErrStn
ErrPasTok
ErrLasBad
ErrInternal
ErrArg
Internal errors.
Argument errors.
ErrEventOverun
A new event occurred before the last one was cleared.
Note: If the Name starts with Err the value stops at the maximum. If the Name starts
with Diag the count rolls over to zero.
GFK-2193A
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4
Clear Counters (6)
The Clear Counters Command sets the counters in the PROFIBUS module to zero.
Clear Counters Command Block – Basic Example
In the following command block, Status is returned in %R251—%R252 (words 8 and 9).
Word Dec (Hex) Definition
Length of command Data Block
Word 1
Word 2
Word 3
Word 4
Word 5
Word 6
Word 7
Word 8
4 (0004)
0 (0000)
8 (0008)
9 (0009)
0 (0000)
0 (0000)
6 (0006)
8 (0008)
Always 0 (no-wait mode request)
Memory type of COMMREQ status word (%R)
COMMREQ status word address minus 1 (%R10)
Reserved
Reserved
Clear Counters command number
Memory type to write response (%R)
Word 9 250 (00FA) Starting Address to write response (response written to %R251)
Word 10 2 (0002) Maximum size of response area
(Word 7) Command Code: Word 7 specifies the Command code for the COMMREQ to
be executed . Clear Counters = 6
(Word 8) Local PLC - Memory Type: Words 8—9 specify the location in the PLC where
the response will be written. Valid values for Word 8 are listed below
Value
Type Dec (Hex)
Description
%R
8 (0008) Register memory (word mode)
%AI
10 (000A) Analog input memory (word mode)
%AQ 12 (000C) Analog output memory (word mode)
%I
16 (0010) Discrete input memory (byte mode)
18 (0012) Discrete output memory (byte mode)
20 (0014) Discrete temporary memory (byte mode)
%Q
%T
%M
22 (0016)
Discrete momentary internal memory (byte mode)
(Word 9) Local PLC - Memory Starting Address: Word 9 determines the starting
address in the local PLC in which the response is to be written. The value entered is the
offset (0-based) from the beginning of PLC memory for the memory type and mode
specified in Word 8. This offset will be either in bits, bytes, or words depending on the
mode specified (for example, if Word 8=16 and Word 9=2, the starting address will be
%I9). Valid ranges of values depend on the PLC’s memory ranges.
(Word 10) Response Memory Size: Words 10 specifies the size of the memory block for
the response. The Response Memory Size is 2 words. If the Response Memory Size
(word 10 in the Clear Counters command block) is set greater than 2, the COMMREQ will
succeed. The unneeded memory locations are not written.
Clear Counters Reply Data Format
Word
Word 1 CommandCode Echo of Command code that this data block is replying to. (0x0006)
Word 2 StatusCode Reports 1 for success and 0 for failure.
Name
Description
4-12
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Index
network connectors, 1-5
network overview, 1-3
network topology, 1-4
standards, 1-1
C
Clear Counters (6), 4-12
COMMREQs
Clear Counters (6), 4-12
Get Slave Status
details, 4-7
R
Read Module Header, 4-10
Reviewing system power requirements,
2-1
memory types, 4-7
PROFIBUS Master, 4-7
Read Module Header (5), 4-10
COMMREQs, general information, 4-3
error detection and handling, 4-5
ladder instruction, 4-3
operation, 4-4
programming recommendations, 4-5
status word, 4-6
Configuration, 3-1
S
Selecting the proper line type, 2-2
Specifications, 1-2
environment, 1-2
power consumption, 1-2
Standards
software, 1-2
CPU version, 1-2
PROFIBUS, 1-1
Status and diagnostic methods, 4-1
Status information, 1-2
Status Word codes, 4-6
Status/firmware ID array, 4-2
F
Features, 1-2
G
Get Slave Status
details, 4-7
memory types, 4-7
I
Indicators, 4-1
Installation procedures
installing bus termination, 2-3
installing the module in the rack, 2-1
reviewing system power requirements, 2-1
L
LEDs, 4-1
M
Mounting location, 1-2
P
Pin-out
PROFIBUS bus plug connector, 1-5
Power consumption, 1-2
Power supplies, 2-1
PROFIBUS
baud rate, 2-4
bus communication, 1-3
GFK-2193A
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