Allen-Bradley 1407-CGCM, User Manual, Page: 165 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
Troubleshooting #HAPTER
2EDUNDANCY
4ABLE-ODULE3TATUS)NDICATOR-3 3ERIES$UNITS
3TATUS)NDICATOR
3TATE
$ESCRIPTION
Off No power
Green Operating in normal condition, controlled by a scanner in Run state
Flashing Green (1 Hz) The module is not configured, or the scanner in idle state
Red Unrecoverable faults, EXCEPTION, or Fatal event
Flashing Red (1 Hz) Recoverable faults, MAC ID has been changed after initialization
4ABLE2EDUNDANCY
3YMPTOM -OST,IKELY#AUSE $IAGNOSTIC!CTION #ORRECTIVE!CTION
Both CGCM units operate as primary
(both provide excitation to the
generator) Serial cable not properly connected Disable excitation to one CGCM unit If excitation turns off as commanded
(one remaining CGCM operating),
repair / replace cable. If both CGCM
units continues to excite, replace
CGCM units
Connect personal computer by using
hyperterminal or similar application
to verify communication output from
CGCM unit redundancy comm port If communication exists, see above.
If no communication output exists,
replace CGCM unit
One or both CGCM units will not
operate as primary Faulty wiring Measure excitation enable input to
CGCM unit that will not act as
primary Verify voltage is applied to
excitation enable input terminal
Check operation of external relay
and associated wiring for
redundancy relay and output Correct excitation redundancy relay
operation
Check wiring of exci/- output
from CGCM unit Correct excitation output wiring
Logix controller error Check output to excitation enable
input (hardware and software) Correct logic as required
Check logic to redundancy relay (if
applicable) Correct logic as required
One CGCM unit has failed or is not
configured properly Troubleshoot as non-redundant
CGCM unit Correct or replace as needed