Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 158)

158 Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
Chapter 7 Troubleshooting
Table 27 - Limiting Modes - OEL
Symptom Most Likely Cause Diagnostic Action Corrective Action
Excitation Current exceeds the
programmed OEL limit (OEL does not
limit/activate)
OEL not enabled Check tag OEL_En and configuration Correct logic or configuration
as required
OEL Gain misadjusted Force into OEL Adjust gains as required
OEL not configured Check OEL settings against generator
excitation requirements / limits
Correct as required
Metering error See Metering troubleshooting See Metering troubleshooting
Excitation is unstable when OEL is
active
OEL Gain misadjusted Force into OEL Adjust gains as required
Table 28 - Real Power Load Sharing
Symptom Most Likely Cause Diagnostic Action Corrective Action
Units do not share load Load share lines not properly
connected
Measure voltage at each LS+/-
terminal. Verify voltage
represents PU load
Re-connect LS lines
Open LS terminals; apply a load,
measure LS voltage.
Voltage equals (kW/Rated
kW)*LSFSVoltage
If Voltage not correct, replace CGCM
unit after verifying configuration
settings
Load sharing not enabled Check output tag kW_LS_EN is
set and input tag
kW_LS_ACTIVE is true
If Loadsharing must be disabled no
anomaly is present, otherwise correct
loadsharing logic for tag kW_LS_En
CGCM unit not properly configured Check configuration parameters
are properly set. Refer to Load
Share tab, Chapter 4
Input correct configuration
parameters
Wiring errors cause CGCM unit to not
meter kW properly
Check kW indication from CGCM
unit against second meter for
accurate kW indication
Correct wiring errors
Governor not responding to load
share error
Observe that load share error is
being received from CGCM unit
in host controller
Correct anomaly in Host controller if a
valid load share error is received
Units do not share load equally: one
unit increases the other unit
decreases
Load share lines connected with
polarity reversed
Observe that load share error is
being received from CGCM unit
in host controller and error
polarity is correct
Correct polarity on LS lines