Rockwell Automation SD3100 DISTRIB PWR SYS SD3100 DC PWR MODULE - Manual (Page 45)

Maintenance and Troubleshooting 4-3
4.2.1.3 Instantaneous Overcurrent Fault (Bit 4)
LED indicator: EXT FLT
UDC Error Code: 1004
The armature current feedback value is greater than the Max Current Limit value (plus
75%) entered as a configuration parameter. The system will immediately go idle when
this fault is detected.
4.2.1.4 Conduction Timeout Fault (Bit 5)
LED indicator: N/A
UDC Error Code: 1005
Discontinuous conduction has not been detected within 2 seconds of CML_RUN
(register 100/1100, bit 0) being turned off.
4.2.1.5 Loss of Field Fault (Bit 6)
LED indicator: PM FLT
UDC Error Code: 1006
The field current feedback value is less than the Field Loss Trip Point parameter value.
Refer to instruction manual S-3006 for detailed information regarding the occurrence
of this fault.
4.2.2 Power Module Warnings
The following Power Module warnings cause the identifying bit in the UDC Drive
Warning Register (203/1203) to be set. The bits in this register should be examined to
determine the cause of the warning. Any resulting action is determined by the
application task. No LED indicator or UDC error code is provided for drive warnings.
4.2.2.1 Three-phase Bridge SCR Not Firing Warning (Bit 0)
Check the SCR Diagnostic register (204/1204) to determine which SCR is not working
properly. Refer to the SD3000 Drive Configuration and Programming manual (S-3006)
for detailed information on register 204/1204.
4.2.2.2 Low Line Voltage/Phase Missing Warning (Bit 1)
The system has detected that the AC line voltage is less than 85% of the nominal
value entered as a configuration parameter. This can be caused by a low line
condition or a missing phase. The system will automatically adjust the phase angle to
give the correct current amount and will continue to fire SCRs as long as zero
crossings are detected. If zero crossings are no longer detected, a fault condition will
result.