Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 53)

Trusted TM
AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 53
IFIU_CHANNEL_FAULT
0x52nn or 0x52mn
Modules:Input, 8442, 8480
Detects a faulty input channel. Faults could be on the field interface
adapter or due to field effects; later firmware is more robust to field
faults.
For inputs and 8480: subcode nn = channel, 0x00 to 0x29 (0 to 41)
(channels 0 and 41 are internal reference channels.)
For 8442: subcode mn, m = quadrant 0 – 2, n = speed input channel 0
– 8.
Swap the module and test it in an unused unconnected slot. If it still
indicates the same fault, return the module for repair. If its replacement
has the same fault, check the field circuits and earthing.
For 8480 firmware before 110, this fault can occur during some output
ramps; upgrade to latest firmware.
For 8442, if there are faults reported in the log on more than one
quadrant, the fault is probably outside the module (T8846 or field input).
Action:Slice fault
IFIU_CHAN_PIN_FAULT
0x53nn
Modules:Input
Detects a short at the IFIA PRM DAC drive pins and the IFIA sigma
delta feedback drive pins. This includes shorts between adjacent pins
and shorts to the power rails. Return the module for repair.
Subcode nn = channel, 0x00 to 0x29 (0 to 41)
(channels 0 and 41 are internal reference channels.)
Action:Slice fault
SFIU_SPEED_CHAN_QUAD_
DISCREP
0x53mn
Modules:8442 Detects a discrepancy between measured tooth periods between
quadrants. If the fault is persistent, return the module for repair.
Subcode mn, m = group 0 – 2, n = speed input channel 0 – 8.
Action:Slice fault
VFMON_RESPONSE_ERROR
0x55mn
Modules: 8472 Detects problems with the voltage monitoring programmable ICs (PICs)
and the readings they return. The subcode meanings vary between
8472 variants and are not necessary for field diagnostics.
550n to 554n (Data inconsistent or discrepant): if the same fault code is
persistent, return for repair.
555n is a definite fault (a PIC appears to be dead); return the module
for repair.
Action: Slice fault
OFIU_XMON_COUNT_ERR
0x56mn
Modules:8472
Subcode:
m = quadrant (0 to 3),
n = channel (0 to F) Detects a PIC clock frequency error or a faulty PIC response packet. A
faulty response packet can be caused by a dead PIC device, failed
3.3V PIC voltage, failed Iso-loop, or open/shorted connection to the
OFIA pin.
It is possible for PICs to crash on severe noise, e.g. short circuit
channel. Swap the module and test it in a different working slot. If the
fault is persistent, return the module for repair.
Action:Slice fault