Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 58)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 58
Some 6nnn series faults can occur on 8442 modules at firmware release 3.5 when some or all Speed
Output FTAs are not fitted, despite ‘SOFTA not present’ configured in the INI. Firmware build 133 (TUV
3.5.1) properly gates out these diagnostic tests when there is no SOFTA.
8442 module outputs and the Speed Output FTAs must be considered part of the same circuit; if
replacement of one part does not cure the fault, try replacing the other part.
OFIU_BTM_SW_SHORT
0x61nn
Modules:Output (not 8442,8480)
Subcode:nn = OFIU 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)
8442: see below DC modules: Detects a bottom FET short, including a stuck control
signal from the neighbour slice. If the voltage on a de-energised
channel is noisy, a spurious fault may be reported on OFF channels.
Check the field wiring for noise and try a replacement module.
This error code also applies to 8448 input channels. For this reason, a
1K resistor is needed in series with the channel for zener-terminated or
volt-free inputs, to allow the module to manipulate the channel. Refer to
PD-8842.
For 8472, the test covers shorts to each switch as indicated by the
quadrant. If the fault is persistent, return the 8472 module for repair.
Action:Slice fault
SFIU_RELAY_CONTACT_TST
0x61mn
Modules:8442
Subcode: mn; m = quadrant (0 to
3), n = output (0 to 5) This test exercises the module’s output channel FETs as above but
indicates a fault according to the relay that the channel is driving. If the
fault is persistent, return the module for repair. If the fault indicates
random channels, check the field supply voltage.
Action:Slice fault
OFIU_CHANNEL_TYPE_ERR
0x62nn
Modules:8448
Subcode:nn = channel, 0x00 to
0x27 (1 to 40) A fault is reported if the channel is not configured as an INPUT or an
OUTPUT. Since there is no normal cause for this fault, report it to ICS
Triplex Technology.
Action:Slice fault
SFIU_RELAY_CONTACT_ERR
0x62mn
Modules:8442
Subcode: mn = quadrant (0 to 3),
output (0 to 5) An output relay contact has failed on the Speed Output FTA. Replace
and return the FTA when possible.
Note that on firmware release 3.5 this error occurs with no SOFTA
present even if marked as absent in the INI; in this instance a firmware
upgrade is recommended.
Action:Slice fault
OFIU_FET_OPEN
0x63nn
Modules:Output (not 8442,8480)
Subcode:nn = output channel
8471: 0x00 to 0x1F (1 to 32)
Others: 0x00 to 0x27 (1 to 40)
8472: mn = quadrant (0 to 3),
channel (0 to F) DC modules: Detects open FET/MOSFET switches or faults in the
drive or sense circuits. This fault may be triggered by noisy field loads
that may make one slice detect an open circuit. If the fault is persistent,
return the module for repair.
This error code does not apply to 8448 and 8449 channels that are
configured as inputs.
Action:Slice fault