4 Fault Isolation
4.3 Fault Isolation Concepts
320 HPM High-Performance Process Manager Service R688
Honeywell December 2020
Table 58 Communications and Control Processor Hard Failure Codes
Corrective Action
(See Table 57)
File address/parity jumpers have
changed
Slot address/parity has changed
Fault insertion Comm crash
Fault insertion Control crash
Fault insertion pattern comparison
failure
The other processor (Communications
or Control) has no heatbeat.
Reserved for future Hard failure codes.
UCN Token Bus Controller command
timeout. These errors occur if the
UTBC does not complete a
non-modem related command.
Physical/MAC command to UTBC
timeout. These errors occur if the
UTBC does not complete a modem
related command.
Modem A failed to ACK reset in
initialization
Modem B failed to ACK reset in
initialization
Modem A failed to ACK reset in jabber
test
Modem B failed to ACK reset in jabber
test
No free FD for TX to test
No free FD for TX for resynch
No free FD for TX for message
Modem failed to ACK Enable Channel
A command
Modem failed to ACK Enable Channel
B command