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Rockwell Automation SA3100 Power Module Interface (PMI) Regulator User Manual

Page 21

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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