4 Fault Isolation
4.9 HPMM Alphanumeric Display
R688 HPM High-Performance Process Manager Service 367
December 2020 Honeywell
In the Run state (UCN node 39). This display
does not blink.
Fail (UCN node 39, file position 2) The Non-
detailed failure display blinks at a 1/2 second
rate.
Flag – Communications processor failure
follows.
Communications processor failure: Local RAM
parity error.
Flag – Control processor error code follows.
Control processor failure code: No response
from Communications processor.
Fail (UCN node 39, file position 2)
Flag – Communications processor failure
follows.
Control processor failure (nonredundant HPM)
A Control processor failure of a nonredundant HPM (after transitioning to the Idle or Run state) results in
a sequencing display of IDLE or OK alternating with FCTL. If the Detailed Display mode (switch) is
enabled, a failure code is displayed in the sequence. The following table lists the sequences.
Table 73 Control Processor Failure Display Sequence
In the Run state (UCN node 39). This display
does not blink.
Run Soft Fail state. (UCN node 39)
Flag – Communications processor failure code
follows.
Communications processor failure. No failure
reported.
Flag – Control processor failure code follows.
Control processor failure code: No response
from Communications processor
Detailed Display error sequence repeats
Run Soft Fail state. (UCN node 39)
FLag -- Communications processor failure code
follows.
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