GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 55)

Power Management Control System
Chapter 4 – Trouble-Shooting
45
Symptom Possible Cause Corrective Action
(EPM 7700 only) 9. Network configuration is
incorrect.
Refer to the following PMCS technical documentation:
1. DEH-40035, GE 7700 Gateway User’s Guide,
section titled “EPM 7700 Network Configuration.”
2. GEH-6514, the PMCS Read-This-Book-First, section
titled “Configuring the EPM 7700 Device Network.”
(EPM 9450Q / 9650Q
with Ethernet option
only) 10. Device communication
settings are incorrect. Using the EPM 9000 Series Communicator software
check device profile:
1. A device IP address (Host address)
2. Device Port set to 502
3. A subnet mask (network-dependent option)
4. A default gateway (optional; required to
communicate between networks)
(EPM 9450Q / 9650Q
with Ethernet option
and acting as an
Ethernet Gateway only) 11. Device communication
settings are incorrect. Check that the Ethernet Gateway Port of the EPM
9450Q/9650Q Gateway is wired to each Modbus device
Port 1.
Using the EPM 9000 Series Communicator software
check device profiles:
1. The pass through baud rate setting of EPM
9450Q/9650Q Gateway must match the baud rates
of all Modbus devices
2. All Modbus devices must have unique addresses.
2.
No communication to
one or more Modbus
IEDs; some IEDs OK. 1. The IED or a repeater is
not powered.
Check that control power is supplied to all IEDs and
repeaters. If the IED or repeater does not operate when
control power is present, contact the GE Resolution
Center at 1-888-GE-RESOLV.
2. RS-485 wiring is shorted
or improperly connected.
Locate and remove the short or incorrect connection.
3. An RS-485 shield has
been grounded
incorrectly.
Refer to Section 2–4, Rule 5 for proper RS-485
grounding considerations. Recheck the RS-485 network
for compliance. Improper grounding can cause
communication errors.
4. The network
configuration is incorrect.
Check that the network conforms to Rules 1 through 8
regarding RS-485 wiring in Chapter 2.
5. The IED is not addressed. Ensure that each IED’s Modbus address corresponds to
the address set at the PMCS.