4 Fault Isolation
4.3 Fault Isolation Concepts
342 HPM High-Performance Process Manager Service R688
Honeywell December 2020
Table 61 IOP Hard Failure Error Codes
Current Calibration/Conversion mode
is invalid for this IOP
Select Calibration/Conversion mode that is valid for this
IOP.
Replace the LLAI IOP card. Call TAC if problem persists.
A physical device address error.
Device software address error.
Replace the IOP card. If multiple IOP cards failed with this
code, or a replacement IOP card fails with this same
code, the card file backpanel may be bad.
Invalid program execution.
Replace the IOP card. If the replacement card provides
the same results, call TAC for assistance.
I/O Link jabber circuit fired.
More than one output has failed in a
DO IOP card. The DO IOP card has
failed so the outputs are set to their
shed states.
Check for the unexpected presence of an active DO
Standby Manual device connected to the FTA. Also,
check for blown fuse F17 on the 24 Vdc nonisolated DO
FTA or improper TB1-17, 18, 19 connections on the same
FTA.
Check the FTA wiring, replace the DO IOP card and/or
the FTA.
Applicable to I/O Link Interface only (not an IOP error).
Power down occurred. The IOP card
lost power and restarted.
None, unless only a single IOP or group of IOPs exhibit
this problem continually when a loss of power should not
be occurring in the HPM. Check to see that the IOP is
properly inserted in the card file. Also check the seating of
the power distribution cables between the card file and
the power system.
RAM address decoding error.
PI data bus diagnostic test failure
Reset IOP. Replace the IOP card if the problem persists.
Reset IOP. Replace the IOP card if the problem persists.
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