Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 62)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 62
OFIU_SMON_ERR
0x6Bmn
Modules: 8472
Subcode: m = error type (see
right), n = channel (0 to F) Detects unknown switch states, partial switch open/circuit,
undervoltage or faults in diagnostic circuits, based on a measurement
of the conductance of each switch (SMON = switch monitor). Each
channel has four switches.
m = 0,1,2,3: unknown switch state 0,1,2,3
m = 4: unknown channel state
m = 5, 6, 7, … A: ON/OFF state discrepancy between switches :
5 = 0<>1, 6 = 0<>2, 7 = 0<>3, 8 = 1<>2, 9 = 1<>3, A = 2<>3)
Return the module for repair.
Action:Slice fault
SFIU_CONTACT_SAMPLE_
ERR
0x6B0n
Modules: 8442
Subcode: n = group 0 – 2 Relay contact sample count out of range. This indicates a fault on the
SOFTA.
Note that on firmware build 130 this error occurs with no SOFTA
present even if marked as absent in the INI; in this instance a firmware
upgrade is recommended. If there is a SOFTA fitted on that group,
replace the SOFTA.
Action:Slice fault
OFIU_SW_INDEP
0x6Cnn
Modules:Output (except 8442,
8480)
Subcode:nn = output channel
8471: 0x00 to 0x1F (1 to 32)
Others: 0x00 to 0x27 (1 to 40)
8472: mn: m = quadrant (0 to 3),
n = channel (0 to F) All modules except 8472:
Detects crosstalk between output channels in the same power group.
Also detects shorted switches.
The test is tripped by either a 25% change in current on another
channel in the power group during the test, or a current on the channel
greater than NLTHRESH when it had been switched off.
The load current on all channels in the same power group must be
relatively constant during the test. Beacons and flashing LEDs can
cause test failures. These devices may require parallel loads or
smoothing/soft-start circuits to reduce current disturbance.
Check the current fluctuations on all channels in the same power
group. The log may show a channel which is changing current. A very
low NLTHRESH setting may also trip this fault. 8448s and 8461s will
show the cause in an extra line in the log (“NLThresh” or “25pc
change”)
If there is no evidence of noisy loads, return the module for repair.
Firmware from release 3.5 (build 130) is more robust to nonlinear
loads.
8472 only:
8472 is a very different design and this test is a clear indication of a
module fault. Each switch is inverted in turn and the change in state is
monitored on this and other switches. Return the module for repair.
Action:Slice fault