Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 45)

Trusted TM
AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 45
HIU_ISL2_SYNC_TST
0x103n
Modules:8442,8472, 8473
Subcode: n = discrepant slice ID
(0, 1, 2 for slice A,B,C) Detects latent faults in the inter-slice link voter logic and discrepancy
detection logic by injecting discrepant data every minute.
If a slice has gone offline, this fault may appear on the other two slices
and may be ignored. Otherwise return the module for repair.
Action:Slice fault
HIU_ISL2_SYNC_ERR
0x104n
Modules:Output
Subcode: n = Sync Error bit
position (0, 1, 2)
Detects a failed slice or a faulty ISL bus connection between slices.
If a slice has gone offline, this fault may appear on the other two slices
and may be ignored. Otherwise return the module for repair.
0 = fault on this slice
1 = fault on upstream slice
2 = fault on downstream slice
Action:Slice fault