Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 54)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 54
OFIU_IMON_AV_DC_ERR
0x57mn
Modules:8472
Subcode:
m = quadrant (0 to 3),
n = channel (0 to F) Detects offset errors in the current monitor op-amp. This can be
caused by a gain/offset resistor fault or op-amp fault. If the fault is
persistent, return the module for repair.
Action:Slice fault
OFIU_VMON_AV_DIFF_ERR
0x58mn
Modules:8472
Subcode:
m = quadrant (0 to 3),
n = channel (0 to F) Detects a leaky MOSFET in the back-to-back MOSFET pair that
comprises each AC switch. It also detects a fault in the VMON sense
resistor for each MOSFET drain. Leakage currents will cause a VMON
phase imbalance as the AC voltage changes direction. These faults
have been seen in modules that may have been contaminated at
manufacture. If the fault is persistent, return the module for repair.
Action:Slice fault