Table of Contents
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Chapter 7
Troubleshooting
Table 27 - Limiting Modes - OEL
Symptom
Excitation Current exceeds the
programmed OEL limit (OEL does not
limit/activate)
Excitation is unstable when OEL is
active
Table 28 - Real Power Load Sharing
Symptom
Units do not share load
Units do not share load equally: one
unit increases the other unit
decreases
Units do not share load equally: units
both change together
170
Most Likely Cause
OEL not enabled
OEL Gain misadjusted
OEL not configured
Metering error
OEL Gain misadjusted
Most Likely Cause
Load share lines not properly
connected
Load sharing not enabled
CGCM-DLR unit is not properly
configured
Wiring errors cause CGCM-DLR unit
to not meter kW properly
Governor does not respond to load
share error
Load share lines are connected with
polarity reversed
Load share full-scale voltage
configurations do not match
Governor error
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Diagnostic Action
Check tag OEL_En and configuration
Force into OEL
Check OEL settings against generator
excitation requirements / limits
See
Metering
troubleshooting
Table 30
Force into OEL
Diagnostic Action
Measure voltage at each LS+/-
terminal. Verify that voltage is
PU load
Open LS terminals; apply a load,
measure LS voltage.
Voltage equals (kW/Rated
kW)*LSFSVoltage
Check output tag kW_LS_EN is
set and input tag
kW_LS_ACTIVE is true
Check configuration parameters
are properly set. See
Load Share
Page,
Chapter 4
Check kW indication from
CGCM-DLR unit against second
meter for accurate kW indication
Observe that load share error is
being received from CGCM-DLR
unit in host controller
Observe that load share error is
being received from CGCM-DLR
unit in host controller and error
polarity is correct
Check full load voltage
configuration in each load share
device
Check governor for use of LS
error from CGCM-DLR unit
Corrective Action
Correct logic or configuration
as required
Adjust gains as required
Correct as required
See
Metering
troubleshooting
Table 30
Adjust gains as required
Corrective Action
Reconnect LS lines
If Voltage is not correct, replace
CGCM-DLR unit after you verify
configuration settings
If Loadsharing must be disabled no
anomaly is present, otherwise correct
loadsharing logic for tag kW_LS_En
Input correct configuration
parameters
Correct wiring errors
Correct anomaly in Host controller if a
valid load share error is received
Correct polarity on LS lines
Set full load voltage same in all load
share devices
Correct governor
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