Rockwell Automation SA3100 Power Module Interface (PMI) Regulator - Manual (Page 21)

PMI Regulator Motherboard 2-5
P.M. FLT (red) - When lit, this LED indicates that one of the hardware fault
conditions listed below has been detected in the Power
Module:
• DC bus overcurrent fault. The hardware detects that DC
bus current exceeds 125% of the rated Power Module
current.
Corresponding UDC location: Register 202/1202, bit 1
• Instantaneous overcurrent fault (IET). An overcurrent is
detected in one of the power devices. Register 204/1204
indicates which power device detected the overcurrent.
Corresponding UDC location: Register 202/1202, bit 3
• Charge bus time-out fault. (Note that the EXT FLT LED
will also be on.) This fault indicates one of the following
conditions:
• The DC bus is not fully charged within 10 seconds after
the bus enable bit (register 100/1100, bit 4) is turned on.
• The drive is on and feedback indicates that the pre-
charge contactor has opened.
• DC bus voltage is less than the value stored in the
Power Loss Fault Threshold (PLT_EO%) tunable
variable.
Corresponding UDC location: Register 202/1202, bit 6
• Over temperature fault. The heatsink temperature exceeds
100° C.
Corresponding UDC location: Register 202/1202, bit 7
EXT FLT (red) - When lit, this indicates that the PMI Regulator has detected a
fault external to the Regulator itself. One of the following fault
conditions has occurred:
• DC bus over voltage. Hardware detects that DC bus
voltage exceeds the rating of the unit.
Corresponding UDC location: Register 202/1202, bit 0
• Ground current fault. Ground current exceeds the rating of
the unit.
Corresponding UDC location: Register 202/1202, bit 2