Rockwell Automation SA500 AC Power Modules - Manual (Page 47)

Diagnostics and Troubleshooting 5-1
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HAPTER
5
Diagnostics and Troubleshooting
The PMI monitors the Power Module for numerous fault and warning conditions. Faults
cause the Power Module transistor gate firing signals to be turned off and bring the
motor to a coast-to-rest stop. Warnings indicate problems in the Power Module and
PMI, but do not shut down the drive.
See Appendix D for a cross-reference of fault and warning bits and associated LEDs.
See the SA500 Drive Configuration and Programming instruction manual (S-3044) for
more specific information about the Fault and Warning registers.
5.1 Drive Faults (UDC Register 202/1202)
Drive faults are reported in register 202/1202 and latched until the Fault Reset bit
(register 100/1100, bit 8) is turned on. Most faults are signaled by an LED indicator on
the Power Module faceplate. Note that the status of register 202/1202 is also reported
in the error log for the UDC task.
Drive faults cause the PMI to shut down the drive. Drive faults do not cause the UDC
module or the UDC task to shut down.
Power Module Overtemperature (Bit 0)
LED indicator: P.M. FLT
Bit 0 will be set if the temperature of the Power Module’s heatsink exceeds the
maximum rating or if the motor current exceeds the Power Module’s capacity. Error
code 1016 will also be displayed in the error log of the UDC task in which the fault
occurred.
Instantaneous Overcurrent (Bit 1)
LED indicator: EXT FLT
Bit 1 will be set if any of the three motor feedback currents (Iu, Iv, Iw) exceeds 133% of
the Power Module’s maximum rated RMS current. Error code 1017will also be
displayed in the error log of the UDC task in which the fault occurred.
DC Bus Overvoltage (Bit 2)
LED indicator: P.M. FLT
Bit 2 will be set if DC bus voltage exceeds 400 VDC. Error code 1018 will also be
displayed in the error log of the UDC task in which the fault occurred.