GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide User Manual
Page 56
Power Management Control System
Chapter 4 – Trouble-Shooting
46
Symptom
Possible Cause
Corrective Action
6. Two or more Modbus
IEDs have the same
address.
Check IEDs for duplicate address assignments. Change
the address of the affected IED, then attempt to
communicate with the original address to see if
another IED has that address.
Check any dual-port IEDs to be sure that each RS-485
port is wired to a separate RS-485 network.
3.
No communication to
any IEDs on one
commnet segment.
1. The IEDs or a Repeater
on that segment is not
powered.
Check that control power is supplied to all IEDs. Check
that two LEDs are lit on each Repeater, indicating that
control power is present. If the IED or Repeater does
not operate when control power is present, contact the
GE Resolution Center at 1-888-GE-RESOLV.
2. Commnet wires are
shorted or improperly
connected.
Locate and remove the short or incorrect connection.
3. The network
configuration of the
segment is incorrect.
Check that the segment conforms to Rules 1 through 5
in Chapter 2 regarding the number of IEDs permitted
per commnet segment and wiring requirements and
limitations.