GE Network Card GEH6505A User Manual

GEH–6505A  
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POWER LEADER™ Ethernet Gateway  
Table of Contents  
Chapter 1 – Introduction ...........................................................................................1  
1–1 Overview .................................................................................................................................. 1  
1–2 Physical Description ............................................................................................................... 2  
1-3 Operational Description.......................................................................................................... 3  
Message Format................................................................................................................. 3  
Gateway/Host Interface.................................................................................................... 3  
1–4 Specifications .......................................................................................................................... 4  
1–5 Environmental Requirements................................................................................................ 4  
1–6 Terminology............................................................................................................................ 4  
Chapter 2 – Installation .............................................................................................5  
2–1 Mounting................................................................................................................................. 5  
2–2 Control Power Connections................................................................................................... 5  
2–3 Ethernet Connection.............................................................................................................. 5  
2–4 Modbus Connection............................................................................................................... 6  
2–5 Diagnostic Connection........................................................................................................... 6  
2–6 Wiring Rules for Modbus Networks....................................................................................... 6  
2–7 Modbus Equivalent Addresses ............................................................................................... 7  
Chapter 3 – Configuration.........................................................................................8  
3–1 Configuration Procedure ....................................................................................................... 8  
3–2 Ethernet Gateway IP Address................................................................................................. 9  
3–3 Baud Rate Specification......................................................................................................... 9  
3–4 Message Monitoring ............................................................................................................. 10  
3–5 Ethernet Driver ..................................................................................................................... 10  
3–6 Gateway Diagnostics ............................................................................................................. 11  
Display Socket, IP Address and Subnet Mask................................................................ 11  
RS485 Loop-back Test..................................................................................................... 11  
Ethernet Test ................................................................................................................... 11  
Exit Diagnostics Program ............................................................................................... 11  
Network Test – FACTORY USE ONLY .......................................................................... 12  
3–7 Advanced Options – Technical Support Personnel ONLY ............................................... 12  
Updating the Gateway Software ..................................................................................... 12  
Chapter 4 – Operation .............................................................................................13  
Chapter 5 – Diagnostic Messages and Errors .......................................................14  
5–1 Monitor Mode....................................................................................................................... 14  
5–2 Processing Error Messages ................................................................................................... 14  
RS485 Port Configuration Worksheets..................................................................16  
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POWER LEADER™ Ethernet Gateway  
Table of Contents  
List of Figures  
Figure 1. POWER LEADER Ethernet Gateway. ............................................................................................ 1  
Figure 2. Typical use of Ethernet Gateway. ................................................................................................... 2  
Figure 3. Front view of Ethernet Gateway, showing dimensions. ................................................................ 2  
Figure 4. Rear view of the Ethernet Gateway, showing Ethernet, RS485 and RS232 ports........................ 2  
Figure 5. Ethernet headers on Modbus messages......................................................................................... 3  
Figure 6. Mounting hole patter for Ethernet Gateway. ................................................................................ 5  
Figure 7. Connecting control power to the Ethernet Gateway..................................................................... 5  
Figure 8. Making the Ethernet connection to the Gateway. ........................................................................ 5  
Figure 9. Connecting an RS485 network to the Ethernet Gateway.............................................................. 6  
Figure 10. Termination of the RS485 network at the last Modbus device.................................................. 6  
Figure 11. Connecting a dumb terminal to the RS232 port......................................................................... 6  
Figure 12. Terminal communications settings. ............................................................................................ 8  
Figure 13. Ethernet Gateway configuration menu........................................................................................ 8  
Figure 14. Gateway diagnostics menu.......................................................................................................... 11  
List of Tables  
1. Examples of Modbus RTU compatible devices. ....................................................................................... 1  
2. POWER LEADER Ethernet Gateway specifications. ................................................................................ 4  
3. POWER LEADER Ethernet Gateway environmental requirements........................................................ 4  
4. POWER LEADER commnet devices supported by the Modbus Concentrator...................................... 7  
5. RS485 Port Settings.................................................................................................................................... 10  
6. Diagnostic messages key............................................................................................................................ 14  
7. Error message key...................................................................................................................................... 14  
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POWER LEADER™ Ethernet Gateway  
Chapter 1 – Introduction  
Device  
Description  
Chapter 1 – Introduction  
1–1 Overview  
EPM 3710  
Full-function, three-phase electronic  
meter with optional pulse initiation,  
waveform capture, data logging, and  
protective relay outputs.  
The GE POWER LEADER™ Ethernet Gateway  
(catalog number PLENETG01), shown in Figure 1,  
is a microprocessor-based device that connects one  
to four RS485-based Modbus Remote Terminal Unit  
(RTU) networks to an industry-standard, high-  
speed Ethernet network. Up to 31 Modbus RTU  
devices can be connected to each of the Modbus  
RTU networks.  
EPM 3720  
Full-function, three-phase electronic  
meter with optional pulse initiation,  
waveform capture, data logging,  
protective relay outputs, and harmonic  
distortion measurements.  
Multilin 269 Plus  
Motor Management industrial motors and associated  
Relay mechanical systems.  
Protection for medium-voltage  
Multilin 565 Feeder Complete time-overcurrent phase and  
Management Relay ground protection by monitoring feeder  
phase current and ground current.  
Fanuc 90/30 PLC  
Programmable logic controller (PLC)  
for applications from simple relay  
replacement to midrange process  
control.  
Fanuc 90/70 PLC  
Programmable logic controller with  
multiple processors and programming  
capabilities for large, high-speed  
applications.  
Modbus  
Concentrator  
Maps addresses of up to 32 attached  
POWER LEADER communications  
network (commnet) devices to  
equivalent Modbus addresses for use  
with the Ethernet Gateway.  
Figure 1. POWER LEADER Ethernet Gateway.  
The Ethernet Gateway works with GE’s Power  
(PMCS),  
Management  
Control  
System  
a
Table 1. Examples of Modbus RTU compatible devices.  
comprehensive power management software  
platform that acts as the ‘host’ to RS485 networks  
attached to the Ethernet Gateway. A special part of  
the PMCS called the Dynamic Data Exchange  
(DDE) server is a database that records the  
addresses and configurations of all attached  
devices. The Ethernet Gateway serves as a pass-  
through device, interpreting the addressing  
information and routing queries from the host to  
the Modbus RTU networks and passing answers to  
those queries from the attached devices back to the  
host.  
NOTE: PMCS is certified for use with power  
management components manufactured 5/13/96  
or later. If your system interfaces to: 1) any trip  
units, meters, or relays manufactured prior to  
5/13/96, or 2) any Spectra RMS™ Circuit Breakers  
with MicroVersaTrip PM™ Trip Units, please  
contact the POWER LEADER Customer Support  
Center at 1-800-843-3742.  
As mentioned in Table 1, the Modbus Concentrator  
allows integration of POWER LEADER commnet  
devices with Modbus RTU-compatible networks for  
use with the Ethernet Gateway. See Section 3–5 for  
more details on the integration of commnet devices  
into Modbus networks.  
The Ethernet Gateway strictly conforms to the  
Modbus RTU protocol, providing the capability to  
tie the supported Modbus RTU devices into an  
Ethernet network. Table 1 contains a partial list of  
devices that are compatible with the Ethernet  
Gateway and conform to the Modbus RTU  
standard.  
Figure 2 illustrates a typical Modbus RTU network  
connected to a high-speed Ethernet through an  
Ethernet Gateway.  
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POWER LEADER™ Ethernet Gateway  
Chapter 1 – Introduction  
Host  
PMCS  
Other  
P C  
Other  
P C  
Ethernet  
Ethernet  
Gateway  
PL C  
90/30  
Multilin  
565  
RS485 Modbus RTU  
RS485 Modbus RTU  
E P M  
3720  
EP M  
3710  
Modbus  
Concentrator  
Multilin  
269+  
PLC  
90/70  
Spectra  
E CM  
PLEPM  
commnet devices  
POWER  
LEADER  
Meter  
MVT- PM  
Trip Unit  
Figure 2. Typical use of Ethernet Gateway.  
many as 31 Modbus devices each and up to 247  
Modbus addresses each. RS485 ports are DB-9 (9-pin  
1–2 Physical Description  
D
shell) connectors with the following pin  
Figure 3 is an outline drawing showing the  
dimensions of the Ethernet Gateway. Figure 4 is a  
rear view of the Gateway showing its control power,  
Ethernet, RS485 and RS232 connections.  
assignments:  
Data -  
Pin 1  
Pin 2  
Pin 5  
Data +  
Ground  
The following ports and connections are provided  
on the Gateway:  
• One RS232 port (also DB-9 style) allows connection  
of dumb terminal for configuration and  
• A pair of Ethernet ports provides input and output  
connections to the either a 10BaseT or a 10Base2  
Ethernet network.  
a
troubleshooting of the Ethernet Gateway.  
• A standard PC-style power connectorfor AC control  
power input.  
• Four RS485 ports support up to fourModbus RTU  
networks, labeled Network 1 to Network 4, with as  
7.5 in.  
166.0 mm  
Status  
LEDs  
Power  
HDD  
Reset  
Power  
on/off  
switch  
Com 1  
RS232 port for  
dumb terminal  
Com 2  
RS232 port  
not used  
6.7 in.  
170.0 mm  
1
2
3
4
keyboard port  
not used  
Length:  
15.5 in.  
393.0 mm  
Control power  
connection  
Four  
RS485  
ports  
10Base2 and  
10BaseT  
Ethernet ports  
7.32 in.  
196.0 mm  
0.32 in.  
8.0 mm  
Figure 3. Front view with dimensions.  
Figure 4. Rear view showing ports.  
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POWER LEADER™ Ethernet Gateway  
Chapter 1 – Introduction  
DD Destination device port number – the Gateway  
RS485 port to which the message should be  
routed (0 - 3)  
1-3 Operational Description  
The Ethernet Gateway transparently passes message  
between the host and devices attached to the  
Gateway. Figure 5 illustrates the stripping or adding  
of Ethernet headers to the Modbus messages. This  
section describes the nature of these messages and  
how the Gateway routes them. The following  
information is not necessary for configuration and use of  
the Ethernet Gateway, but is provided for users who may be  
developing custom applications and need such  
information.  
EE Error status byte (0 = no parity errors, 1 = parity  
errors encountered)  
NN Number of bytes in the Modbus message  
CC A one byte checksum calculated by adding the  
first 14 bytes in the header  
The header is stripped off the message by the  
Gateway and the remainder of the message is sent  
without changes to the destination device (or  
interpreted by the Gateway if a configuration  
message).  
Message Format  
Messages sent from the software to RS485 devices  
via the Ethernet Gateway have a 15-byte header  
inserted in front of the message. The header tells  
the Gateway where to send the message, how long  
the message is, and if parity errors were  
encountered. This header has the following format:  
Messages from the RS485 devices to the host are  
processed by adding the 15-byte header onto the  
start of the message. For messages from devices to  
the host, the byte in the DD position contains the  
RS485 port from which the message came.  
Cyclic redundancy check (CRC) handling is done  
by the host on the Ethernet and the RS485 device  
on the Modbus. The Gateway does not check the  
CRC when receiving messages from the host or  
from RS485 devices.  
SS  
DD  
EE  
NN  
CC  
SS  
Sequence of ten AA hex bytes indicating the start  
of a message  
Modbus messages from host to device - Ethernet Gateway str ips off header  
Ethernet  
header  
information  
Modbus  
message  
Modbus  
message  
Ethernet  
RS485  
device  
Host  
PMCS  
Gateway  
Message tr aveling on Ethernet  
Message traveling on RS485  
Modbus  
Ethernet  
Modbus  
Ethernet  
Gateway  
RS485  
device  
header  
information  
message  
message  
Modbus messages from device to host - Ether net Gateway adds header  
Figure 5. Ethernet headers on Modbus messages.  
Gateway/Host Interface  
The Gateway uses TCP/IP (Transmission Control  
Protocol/Internet Protocol) to interface with the  
host on the Ethernet.  
The Gateway initially opens a socket and waits for a  
host device to attempt to connect with the socket.  
Once a connection is established, data messages  
may be transmitted to the Gateway (and ultimately  
the RS485 devices) and messages from RS485  
devices passed to the host.  
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POWER LEADER™ Ethernet Gateway  
Chapter 1 – Introduction  
1–4 Specifications  
1–6 Terminology  
The specifications of the Ethernet Gateway are Following are definitions of some of the terms used  
listed in Table 2.  
in this document.  
POWER LEADER – The GE family of comprehensive  
power management devices and system software used  
to minimize downtime and overall power cost.  
Parameter  
Value  
Control power  
90–132 Vac or 180–264 Vac,  
47–63 Hz; autoranging  
PMCS – Power Management Control System software.  
Power supply =150 VA min  
SCADA (supervisory control and data acquisition) – A group  
of systems including power management and control  
systems.  
(contact your GE sales  
representative for additional  
voltage options.)  
DCS (distributed control system) – A group of systems  
Modbus communications  
Ethernet communications  
Four RS485 ports, 1200 baud,  
2400 baud, 4800 baud, 9600  
baud and 19.2 Kbaud.  
including  
building  
automation  
and  
status  
monitoring systems.  
Ethernet – An open, industry-standard, highp- erform-  
ance network communications protocol that opeartes  
on 10BaseT or 10Base2 transport mediums and  
yields communications rates up to 10 megabits per  
second.  
One PCL-843 16-bit Ethernet  
card; supports 10BaseT or  
10Base2 transport mediums.  
Standards  
UL Listed  
508 & 840  
CSA Certified  
C22.2 No. 14  
Modbus RTU (Remote Terminal Unit) – An open, industry-  
standard, high-performance network communica-  
tions protocol developed by Modicon/AEG  
Schneider Automation.  
Table 2. POWER LEADER Ethernet Gateway specifications.  
Modbus-compatible device – Any device equipped with a  
1–5 Environmental Requirements  
Modbus RTU communications port.  
The environmental requirements of the Ethernet  
Gateway are listed in Table 3.  
Modbus master – A host computer running PMCS  
software.  
RS485/EIA485 – A physical standard for multi-drop,  
high-speed, noise-tolerant communications over a  
twisted pair network; often used with the Modbus  
RTU protocol.  
Parameter  
Value  
Operating temperature  
Storage temperature  
Relative humidity  
0° C to +50° C  
–20° C to +80° C  
10% to 95% noncondensing  
Commnet – A GE proprietary communications network  
standard.  
Vibration response and  
endurance  
IEC 255–21–1  
Severity Class 1  
Commnet-compatible device – Any meter, relay, trip unit, or  
other device equipped with a commnet commu-  
nications port.  
Fast transient surge  
ANSI C37.90.1  
ANSI C37.90.2  
Radiated EMI withstand  
Electrostatic discharge  
IEC 801–2  
Severity Class 4  
Commnet segment – A group of one to four commnet-  
compatible devices (including at most one waveform-  
capturing meter) with all communication ports wired  
to a single Concentrator commnet por.t  
Table 3. POWER LEADER Ethernet Gateway environmental  
requirements.  
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POWER LEADER™ Ethernet Gateway  
Chapter 2 – Installation  
Chapter 2 – Installation  
2–1 Mounting  
The Ethernet Gateway may be mounted on a  
horizontal surface or on a wall, preferably inside an  
enclosure or switchgear lineup. The Gateway should  
be mounted so that it is spaced from enclosure walls  
or from other components in the enclosure. A  
minimum of two inches clearance should be  
allowed along the long sides of the Gateway, and at  
least six inches clearance on the ends to allow for  
ventilation and cable access. To wall mount the  
Ethernet Gateway, attach the brackets to the chassis  
using six of the provided screws through the six  
holes on the inner edges of the mounting brackets.  
Then use the remaining four screws to secure the  
chassis to the wall through the holes in the outer  
edges of the brackets. Be sure that the chassis is  
mounted securely. The hole pattern for the  
mounting flanges of the Ethernet Gateway is shown  
in Figure 6.  
Figure 7. Connecting control power to the Ethernet Gateway.  
2–3 Ethernet Connection  
10BaseT and 10Base2 connections are provided on  
the back of the Ethernet Gateway to connect the  
Gateway to the Ethernet network, as shown in  
Figure 8. The Gateway is equipped with a PCL-843  
16-bit Ethernet card.  
12 in.  
1 in.  
23.0 mm  
305. 0 mm  
8 - R5  
4 - R2.5  
Figure 6. Mounting hole pattern for Ethernet Gateway.  
2–2 Control Power Connections  
Connect the control power cable included with the  
Ethernet Gateway to the standard PC-style power  
outlet on the rear of the enclosure, as shown in  
Figure 7. See Section 1–4 for appropriate control  
power voltage ranges.  
Figure 8. Making the Ethernet connection to the Gateway.  
The ON switch for the Ethernet Gateway is located  
on the front panel. Make sure the Gateway is  
mounted in a location where the power switch is  
not likely to be accidentally hit or switched off.  
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POWER LEADER™ Ethernet Gateway  
Chapter 2 – Installation  
2–4 Modbus Connection  
2–5 Diagnostic Connection  
The Modbus RTU networks should be connected to The RS232 port on the back of the Ethernet  
the RS485 ports on the back of the Ethernet Gateway is provided for connection of a dumb  
Gateway, as shown in Figure 9.  
terminal to the Gateway. The terminal may be used  
for configuring the Ethernet Gateway’s settings or  
for diagnostic purposes. For diagnostic purposes,  
the Gateway may be set to display all messages and  
traffic on the terminal so that problems may be  
tracked down and corrected. To connect a terminal  
(usually a laptop computer running Windows’  
Terminal accessory software) to the Gateway, plug  
its RS232 cable into the RS232 port on the back of  
the Ethernet Gateway, as shown in Figure 11.  
Figure 9. Connecting an RS485 network to the Ethernet  
Gateway.  
Per the EIA-485 standard, the RS485 networks must  
be terminated at both ends. Position the Ethernet  
Gateway at one end of the RS485 networks, as it is  
internally terminated. The user must ensure that  
the final device on each network is terminated  
correctly, as shown in Figure 10.  
Figure 11. Connecting a dumb terminal to the RS232 port.  
2–6 Wiring Rules – Modbus Networks  
When wiring Modbus RTU devices to an Ethernet  
Gateway, follow the wiring rules below to ensure  
proper configuration. Refer to GEH-6502, the PMCS  
Network Architecture Guide, for specific examples of  
correct and incorrect configurations.  
1. Up to 31 Modbus devices may be attached to a  
single Modbus network. RS485 repeaters do not  
have Modbus addresses, but do count as devices  
toward the 31 physical devices per network limit.  
2. Every device on a single Modbus network must  
have a unique address. (Devices on different  
networks may use the same Modbus address,  
i.e., it is acceptable to have a device addressed as  
device 10 on Network 1 and another device  
addressed as device 10 on Network 2.) Use the  
Modbus address worksheets (at the end of this  
Figure 10. Terminating an RS485 network at the last device.  
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POWER LEADER™ Ethernet Gateway  
Chapter 2 – Installation  
manual) to record the devices attached to each devices. To the Modbus network, the commnet  
network and verify that each device on each devices appear as valid Modbus addresses.  
network has a unique address.  
To provide seamless integration of commnet-  
3. Modbus Concentrators may be used to add compatible devices into the Modbus RTU network,  
POWER LEADER commnet devices to  
a
the Concentrator directly maps commnet addresses  
Modbus network. The Concentrator assigns a to equivalent Modbus addresses. The valid range of  
Modbus-equivalent address to each commnet commnet addresses recognized by the concentrator  
device attached to it. See Section 2-7 for a is 300–514. These addresses are one-to-one mapped  
discussion of commnet and Modbus-equivalent to the equivalent Modbus address range of 33–247.  
addresses.  
For a more detailed discussion of commnet devices  
and the function of the Modbus Concentrator, see  
GEH-6491, the Modbus Concentrator Users Guide.  
NOTE: While Modbus Concentrators are counted  
as regular Modbus devices, the commnet devices  
attached to Modbus Concentrators do NOT count  
Table 4 lists commnet devices supported by the  
Modbus Concentrator (and the Ethernet Gateway).  
toward the 31 device/network limit, but ARE  
considered in the 247 address/network limit.  
Device  
Description  
POWER LEADER EPM  
Full-function, three-phase electronic  
meter with optional pulse initiation;  
simple retrofit to existing  
electromechanical installations. See  
GEH–6302 for a full description.  
4. No connections between Modbus networks are  
permitted, either directly or through repeaters.  
5. Modbus networks are constrained to  
a
maximum 4,000 feet of communication cable  
without repeaters.  
POWER LEADER Meter Full-function three-phase meter with  
optional protective relaying and  
6. RS485 repeaters may be used to extend the  
wiring length of a Modbus network or to  
provide isolation between runs of cable in a  
Modbus network. Refer to GEH-6502 for  
appropriate wiring lengths with repeaters.  
waveform capture. See GEH–5892.  
POWER LEADER MDP Three-phase and ground protection  
Overcurrent Relay  
Spectra ECM™  
against overloads and rapid  
detection of short circuits.  
See GEK–100682.  
Advanced motor protection in full-  
voltage-nonreversing (FVNR) and  
full-voltage-reversing (FVR)  
combination starter applications.  
See GEH–6435.  
2–7 Modbus Equivalent Addresses  
A maximum of 31 Modbus devices can be  
supported on a single RS485 network of the  
Ethernet Gateway. However, the Modbus RTU  
protocol permits up to 247 individual addresses to  
be recognized. These additional 216 addresses may  
be utilized by commnet devices attached to a special  
Modbus device, the Modbus Concentrator.  
MicroVersaTrip PM™ trip Overcurrent protection and optional  
unit in Spectra RMS™  
molded-case circuit  
breakers  
full-function metering and protective  
relaying. See GEH–5934.  
MicroVersaTrip PM™ trip Overcurrent protection and optional  
unit in AKR, Power  
Break® and Power  
Break® II insulated-case  
circuit breakers.  
full-function metering and protective  
relaying. See GEH–6273.  
Commnet is a communications protocol utilized by  
many of the devices from GE’s POWER LEADER  
family of power management devices. The Modbus  
Concentrator is a Modbus RTU device that permits  
commnet devices to be assigned Modbus-equivalent  
addresses. Each Modbus Concentrator keeps track  
of up to 32 commnet devices and directs traffic  
between the Modbus network and the commnet  
Table 4. POWER LEADER commnet devices supported by the  
Modbus Concentrator.  
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POWER LEADER™ Ethernet Gateway  
Chapter 3 – Configuration  
Chapter 3 – Configuration  
The Ethernet Gateway needs to be properly  
configured to communicate with your RS485  
networks. Two items are critical to proper  
performance of your Gateway: the Gateway’s  
Ethernet  
address  
and  
the  
RS485  
port  
communication settings. The Gateway’s Ethernet  
address should be set so that the host software will  
know how to address messages to the Gateway. You  
must configure the Ethernet Gateway with the  
appropriate baud rate and communications settings  
for each RS485 port to match attached RS485  
network. After initial setup, you should only need to  
make changes to the Gateway’s settings after adding  
devices or making system changes.  
Follow the instructions in Section 3-1 to perform the  
initial configuration. After the network is  
operational, you may make configuration changes  
through the dumb terminal. These procedures are  
described in the following sections.  
Figure 12. Terminal communications settings.  
You are now ready to configure the Gateway, as  
outlined below:  
In all cases, be sure to save any configuration  
changes to the Gateway’s hard drive (option 12) for  
safe retrieval in the event of a power loss.  
1. Type SET (must be typed in capital letters)  
then press <ENTER> to bring up the  
configuration menu. If you make an error  
typing in this string, wait ten seconds and try  
again.  
3–1 Configuration Procedure  
2. The terminal displays the configuration  
menu:  
Configuration of the Gateway requires a dumb  
terminal with RS232 port set to 19.2 Kbps, 8 data  
bits, no parity, and 1 stop bit. The easiest way to do  
this is to use a portable computer with an RS232  
port, and run the Terminal accessory program from  
Windows.  
Use a null modem cable to attach the laptop to the  
RS232 port of the Gateway, power up the laptop  
and launch the Terminal program (located in the  
Accessories program group in the Windows  
program manager). Click on the Settings menu,  
then  
communications options to look like figure 12.  
choose  
Communications.  
Set  
your  
When you have set your communications options,  
close the options window and power up the Gateway  
(the ON switch is located on the front panel).  
When the Gateway finishes powering up, the  
following message is transmitted to the terminal:  
Figure 13. Ethernet Gateway configuration menu.  
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POWER LEADER™ Ethernet Gateway  
Chapter 3 – Configuration  
Enter the setting number you want to change,  
then press <ENTER>.  
3–2 Ethernet Gateway IP Address  
Ethernet Gateway’s IP address must be properly set  
for it to receive messages sent by the host software.  
Consult your LAN personnel or system  
administrator for assistance in selecting the correct  
IP address. Follow Section 3–7 to modify the IP  
address.  
NOTE: The lower portion of the Configuration Menu is  
labeled Advanced Options. These options are for use  
ONLY by GE technical support personnel. Do NOT select  
any of these options. IF YOU ACCIDENTALLY SELECT  
ANY  
ADVANCED  
OPTION  
FROM  
THE  
WARNING: Setting the Ethernet Gateway to an incorrect  
or conflicting IP address can cause SERIOUS network  
problems. ALWAYS consult your LAN personnel or system  
administrator before making any changes to the IP  
address.  
CONFIGURATION MENU, PRESS <ESC> TO EXIT,  
THEN PRESS <ENTER> TO RETURN TO THE  
CONFIGURATION MENU.  
3. At the prompt, enter the new setting, then  
press <ENTER>. If you enter an invalid value,  
the following message will be displayed:  
3–3 Baud Rate Specification  
You must configure the baud rate and  
communications settings on each RS485 port to  
match the baud rate on the attached RS485  
network. The Gateway supports RS485 speeds of  
1200 baud, 2400 baud, 4800 baud, 9600 baud and  
19.2 Kbaud. Default settings are 19.2 Kbaud, 8 data  
bits, no parity, 1 stop bit.  
Pressing <ENTER> returns you to the  
configuration menu.  
NOTE: Pressing <ESC> while entering a new value for a  
setting discards the changes and redisplays the  
configuration menu.  
4. Configure parameters as desired, by repeating  
steps 2 and 3.  
Each network’s baud rate depends on the devices  
attached to it – see GEH-6502, the PMCS Network  
Architecture Guide, for more details on this.  
5. When you are finished making changes, select  
option 12,  
.
To configure the baud rate and communications  
settings for any of the four RS485 ports, follow  
Section 3-1, referencing the special instructions  
given below regarding the communications options.  
The configuration file on drive A is modified  
with the new parameters and the terminal  
displays the following message:  
Table 5 lists the valid entries for options 1 through  
8 of the Configuration menu, relating to the baud  
rate and communications settings of RS485 ports.  
If an error has been made, select option 13,  
The  
currently displayed settings are discarded and  
the following message is displayed on the  
terminal:  
Correct the error by repeating steps 1–3.  
6. When you have saved the configuration and  
exited, the Ethernet Gateway is ready for  
operation. Turn off the unit until the rest of  
the network is ready for operation.  
9
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POWER LEADER™ Ethernet Gateway  
Chapter 3 – Configuration  
3–4 Message Monitoring  
Option Number:  
1 = RS485 Port 1  
3 = RS485 Port 2  
5 = RS485 Port 3  
7 = RS485 Port 4  
2 = RS485 Port 1  
4 = RS485 Port 2  
6 = RS485 Port 3  
8 = RS485 Port 4  
Valid Entries at Prompt:  
0 = 1200 baud  
1 = 2400 baud  
2 = 4800 baud  
For diagnostic purposes, you may want to monitor  
message traffic across the RS485 ports. This can be  
done on a terminal connected to the RS232 port.  
You may monitor messages on any single RS485  
port or on all four ports simultaneously.  
4 = 19200 baud  
5 = 38400 baud  
6 = 57600 baud  
3 = 9600 baud  
Data Bits:  
Stop Bits:  
Parity:  
0 = 7 data bits  
1 = 8 data bits  
Selecting menu item 14 allows you to select whether  
or not messages are sent to the RS232 port in  
monitor mode and which RS485 ports are to be  
monitored. The following prompt appears:  
0 = 1 stop bit  
1 = 2 stop bits  
0 = None  
1 = Even  
2 = Odd  
Table 5. RS485 Port Settings .  
1. Follow the procedure outlined in Section 3-1  
to configure the Gateway.  
2. At the Configuration menu, select the option  
number, then press <ENTER>. At the prompt,  
enter the new setting, then press <ENTER>. For  
options 1, 3, 5, and 7, enter the new setting  
from the options in Table 5, then press  
<ENTER>. For options 2, 4, 6, and 8, enter each  
new parameter as prompted, using the correct  
entries from Table 5. If you enter an invalid  
value, the following message display:  
Enter your selection from the above choices.  
3–5 Ethernet Driver  
Menu item 10 permits the Ethernet driver to be  
selected. Most systems utilize DIX Ethernet; a  
handful use IEEE Ethernet. The Gateway defaults  
to the DIX Ethernet driver. If your network does not  
function under DIX Ethernet and you have  
eliminated all other potential sources of trouble,  
change the driver setting to IEEE Ethernet and retry  
communications. If this does not resolve the  
problem, contact Customer Service.  
Press <ENTER> to return to the Configuration  
menu.  
NOTE: Pressing <ESC> while entering a new value for a  
setting discards the changes and redisplays the  
Configuration menu.  
3. Follow steps 5 and 6 of Section 3-1 to save any  
changes and exit configuration mode.  
10  
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POWER LEADER™ Ethernet Gateway  
Chapter 3 – Configuration  
Enter the port to be tested: 1, 2, 3, or 4. The  
following message displays:  
3–6 Gateway Diagnostics  
Selecting menu item 11 exits the Gateway software  
and runs the Gateway diagnostics program. The  
Gateway Diagnostics menu shown in Figure 14 is  
displayed on the terminal.  
(where X is the port being tested).  
If the loop-back is successful, the following message  
will be displayed:  
(where Y is the loop-back port).  
If the loop-back is unsuccessful, the following  
message displays:  
Default settings on the RS485 ports for the loop-  
back tests are 115.2 Kbps, 8-N-1.  
Ethernet Test  
Figure 14. Gateway Diagnostics menu.  
Select menu item 3 to test the Gateway’s internal  
Ethernet connections. This performs a self-test of  
the Gateway’s Ethernet card to ensure that it is  
functioning correctly. The following message  
displays:  
Display Socket, IP Address and Subnet  
Mask  
Select menu item 1 to display the IP address and  
subnet mask for the Gateway.  
If the test passes, the following message displays:  
If the test fails, the following message displays:  
RS485 Loop-back Test  
Select menu item 2 to perform a loop-back test on  
an RS485 port. The loop-back test is useful for  
identifying the RS485 ports and for testing  
communications on an RS485 port. To complete  
this test, you will need a short RS485 cable, available  
at an electronics retailer.  
In either case, pressing <ENTER> returns you to the  
diagnostics menu.  
The RS485 port being tested is connected to  
another RS485 port and  
a
test message is  
transmitted from the port being tested. The  
following prompt appears:  
Exit Diagnostics Program  
Select menu item 4 to exit the Gateway diagnostic  
software and reload the Gateway software.  
11  
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POWER LEADER™ Ethernet Gateway  
Chapter 3 – Configuration  
Network Test – FACTORY USE ONLY  
3–7 Advanced Options – Technical  
Support Personnel ONLY  
NOTE: A client program may be requested from GE to  
run on the host when performing the network test. The Ordinarily these options will have been configured  
client attempts to establish a connection to a server (the by the system integrator or direct from the factory;  
Gateway) with the specified IP address, subnet mask and you should NOT alter any of the settings from the  
port number.  
advanced options area of the Configuration menu.  
Menu item 5 is for factory testing of the network. WARNING: ALTERING ANY OF THESE SETTINGS  
End users should NOT select this option. This test MAY RENDER THE ETHERNET GATEWAY  
attempts to communicate with a host across the INOPERABLE. IF YOU ACCIDENTALLY SELECT ANY  
Ethernet. To complete this test, you will need an OPTION FROM THE ADVANCED SETTINGS, PRESS  
RS232 null modem cable, available at an electronics <ESC> TO EXIT, THEN PRESS<ENTER> TO RETURN  
retailer. Before performing this test, the host PC TO THE CONFIGURATION MENU.  
must be running the client software mentioned  
above, and must be connected to the Ethernet  
Gateway via the null modem cable.  
Select menu item 15 to modify the Gateway socket  
identifier. The format is: ####.  
When you select menu item 4, the following  
message is displayed:  
Select menu item 16 to modify the Gateway Internet  
Protocol (IP) address. Enter the IP address in dot  
notation, e.g., 123.145.51.126.  
Select menu item 17 to modify the Gateway subnet  
mask. Enter the subnetwork mask in dot notation,  
e.g., 255.255.255.0.  
Select menu item 18 to modify the FTP PC/TCP  
kernal serial number. The number has the  
following format: 1234-5678-9012.  
If the network test passes, the following message is  
displayed:  
Select menu item 19 to modify the FTP PC/TCP  
kernal authentication key. The number has the fol-  
lowing format: 1234-5678-9012.  
If the network test fails, the following message is  
displayed:  
Select menu item 21 to modify the Gateway Router.  
This item has the following format: 0.0.0.0, 0.0.0.0,  
0.0.0.0 Note that the Router numbers may have  
multiple digits in each placeholder, and each set of  
four numbers represents one router; for example,  
205.109.43.11, 0.0.0.0, 0.0.0.0 is configured for one  
router. The Gateway may be configured with a  
maximum of three routers.  
In either case, pressing <ENTER> returns you to the  
diagnostics menu.  
Updating the Gateway Software  
Option 20 of the Configuration menu allows updat-  
ing of the Ethernet Gateway’s operating software  
and is for use ONLY by factory service personnel.  
12  
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POWER LEADER™ Ethernet Gateway  
Chapter 4 – Operation  
Chapter 4 – Operation  
The Ethernet Gateway, once properly configured,  
requires no user intervention for operation.  
During normal operation, the Ethernet Gateway  
passes messages to and from the attached Modbus  
devices and translates these messages between the  
Ethernet and Modbus RTU protocols.  
Should power to the Ethernet Gateway be inter-  
rupted, communications between the host and the  
RS485 networks will resume automatically and  
immediately when power is restored.  
Likewise, if the Ethernet connection or any of the  
RS485 connections are broken, communications  
will be immediately resumed when the connections  
are restored.  
Any errors encountered by the Ethernet Gateway  
will result in a message being sent back to the host,  
where it will be interpreted and displayed for correc-  
tive action by the operator.  
All processing error messages are sent to the RS232  
port. Processing error messages are listed in Section  
5-1 of this manual.  
13  
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POWER LEADER™ Ethernet Gateway  
Chapter 5 – Errors and Diagnostic Messages  
Chapter 5 – Diagnostic Messages and Errors  
5–1 Monitor Mode  
5–2 Processing Error Messages  
The Ethernet Gateway can be set to send diagnostic Table 7 gives error messages that may be generated  
messages to the RS232 port to be displayed on a by the Gateway and displayed at the PMCS host.  
terminal (see Chapter 3). These diagnostic  
messages can be very useful in tracking down errors  
in configuration or device addressing.  
Message  
Meaning  
Error - Buffer Overflow One or more buffers have  
overflowed.  
Diagnostic messages sent to the RS232 port in moni-  
tor mode have the following format:  
Error - Writing to Flash An attempt to write to flash ROM  
ROM  
(drive A) has failed.  
Error - Reading Flash An attempt to read the flash ROM  
Table 6 explains what each field means:  
ROM  
(drive A) has failed.  
Table 7. Error message key.  
Field  
Meaning  
The relative time of the message in timer  
ticks. This rolls over every  
1,000,000,000 timer ticks.  
Indicates the direction of the message:  
E-n (n = 1,2,3 or 4) indicates a message  
sent from the Ethernet Gateway to  
RS485 port number 1,2,3 or 4  
n-E indicates a message sent from  
RS485 port number 1,2,3 or 4 to the  
Ethernet Gateway  
Header byte added to regular Modbus  
message. Printed as two hex digits.  
Binary data of regular Modbus message.  
Printed as two hex digits.  
Table 6. Diagnostic messages key.  
14  
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POWER LEADER™ Ethernet Gateway  
Chapter 6 – Troubleshooting Guide  
Chapter 6 – Troubleshooting Guide  
The following guide is provided for troubleshooting  
and isolating common problems. It does not cover  
every possible condition. Contact the ED&C  
Customer Support Center at 800-843-3742 if the  
problem is not resolved by these procedures.  
Symptom  
Possible Cause  
Corrective Action  
1. No response at either Lack of power.  
host PC or dumb  
terminal from the  
Check that control power cable is working and  
correctly connected.  
Ethernet Gateway internal  
Remove and reapply power to the Ethernet  
Gateway to see if the failure clears itself  
(possibly caused by external noise). Contact  
Customer Support if the problem persists.  
Ethernet Gateway.  
failure.  
WARNING:  
Voltages hazardous to personnel and equipment may  
be present at the power connection.  
2.  
No response at host  
Faulty Ethernet wiring  
Check that the Ethernet connector is properly  
wired and firmly seated. Test wiring for  
continuity and polarity to host PC.  
PC from the Ethernet between Ethernet Gateway  
Gateway, but terminal and host PC  
connection is OK.  
Ethernet driver may be  
incorrect.  
Check with your system administrator as to  
which Ethernet driver is being used (DIX or  
IEEE). Make sure Gateway is set accordingly  
(Section 3-5).  
3.  
4.  
Ethernet connections Faulty RS485 wiring between Check that the RS485 connector is properly  
wired and firmly seated. Test wiring for  
continuity and polarity on RS485 wiring.  
OK, but no response Ethernet Gateway and  
from RS485  
device(s).  
RS485 networks.  
Lack of control power at  
RS485 device(s).  
Check that control power present and correctly  
connected at device(s).  
Some devices on  
RS485 networks not  
recognized at host.  
Addressing problems or too Refer to Section 5-1 to diagnose the precise  
many devices on segment problem and correct accordingly.  
15  
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POWER LEADER™ Ethernet Gateway  
Configuration Worksheets  
RS485 Port Configuration Worksheets  
Use the following worksheets to record the devices  
attached to the Ethernet Gateway for reference and  
troubleshooting. Record the Ethernet Gateway’s  
Ethernet address on the first page only, then fill in  
the information on the Modbus devices attached to  
each network: device type and physical location,  
and the Modbus address assigned to it.  
Ethernet Gateway Address:  
RS485 Port 1 Worksheet  
Baud Rate for RS485 Port 1  
Modbus  
Device  
Modbus  
Network Number Device Type & Physical Location / Notes  
Address  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
16  
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POWER LEADER™ Ethernet Gateway  
Configuration Worksheets  
RS485 Port 2 Worksheet  
Baud Rate for RS485 Port 2  
Modbus  
Device  
Modbus  
Address  
Network Number Device Type & Physical Location / Notes  
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
17  
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POWER LEADER™ Ethernet Gateway  
Configuration Worksheets  
RS485 Port 3 Worksheet  
Baud Rate for RS485 Port 3  
Modbus  
Device  
Modbus  
Address  
Network Number Device Type & Physical Location / Notes  
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
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
18  
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POWER LEADER™ Ethernet Gateway  
Configuration Worksheets  
RS485 Port 4 Worksheet  
Baud Rate for RS485 Port 4  
Modbus  
Device  
Modbus  
Address  
Network Number Device Type & Physical Location / Notes  
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
19  
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GE Electrical Distribution & Control  
General Electric Company  
41 Woodford Ave., Plainville, CT 06062  
GEH-6505A 0996  
© 1996 General Electric Company  
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