Rockwell Automation SA3100 Power Module Interface (PMI) Regulator - Manual (Page 63)

Diagnostics and Troubleshooting 6-1
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HAPTER
6
Diagnostics and
Troubleshooting
Operation of the SA3100 drive is monitored by the PMI processor. Fault and warning
registers (202/1202 and 203/1203) in the UDC must be used when the system detects
a fault or a warning.
The fault conditions reported in the Drive Fault register result in turning off the drive.
The UDC task is not stopped automatically when a drive fault occurs unless it is
specifically instructed to do so in an application task. The user must ensure that the
AutoMax application task tests register 202/1202 and takes appropriate action if a
fault occurs.
The warnings indicated by the Drive Warning register cause no action by themselves.
Any resulting action is determined by the application task. The user must ensure that
the AutoMax application task monitors register 203/1203 and takes appropriate action
if any of these conditions occurs.
Refer to instruction manual the SA3100 Drive Configuration and Programming
instruction manual (S-3056) for further details on using the Drive Fault and Drive
Warning registers.
6.1 PMI Regulator Faults (UDC Register 202/1202)
If the PMI processor detects a fault, it will disable the gates of the power devices, and
the motor will begin a coast-to-rest stop. The PMI processor will turn off the MCR
output when it detects that motor current is less than 2% of the rated motor current, or
within 300 msec of the occurrence of a fault, even if the 2% current level has not been
reached.
Most faults are signaled by one of the LED indicators on the PMI Regulator. The bits
in the Drive Fault register (202/1202) should be examined to determine the cause of
the fault. If a fault occurs the identifying bit will set. The fault will also be recorded in
the error log for the UDC task in which it occurred.
6.1.1 DC Bus Overvoltage Fault (Bit 0)
LED indicator: EXT FLT
The DC Bus Overvoltage fault bit is set if the DC bus voltage exceeds the rating of the
Power Module. Error code 1018 will be displayed in the error log of the UDC task in
which the fault occurred.