4 Fault Isolation 
4.3  Fault Isolation Concepts 
328  HPM High-Performance Process Manager Service   R688 
    Honeywell  December 2020 
Table 58 Communications and Control Processor Hard Failure Codes 
Corrective Action 
(See Table 57) 
Reserved for future GBL Subsystem 
crash codes. 
Comm to Control interrupt failure. 
Control to Comm interrupt failure. 
I/O Link code in wrong location. 
I/O Link code wrong size. 
Reserved for future miscellaneous 
crash codes. 
Control processor startup failure. 
I/O Link processor(s) startup failure. 
Bad common memory signature. 
CPU Free change priority fail #1. 
CPU Free change priority fail #2. 
Could not set CPU Free LEF. 
Could not reset CPU Free LEF. 
Could not reset Timer Comparison 
LEF. 
Could not set Timer Comparison LEF. 
Reserved for future high priority task 
crash codes. 
Could not set Peer to Peer Statistics 
LEF. 
Could not reset Peer to Peer Statistics 
LEF. 
Could not reset Diagnostic Overflow 
LEF. 
Could not set Diagnostic Overflow 
LEF. 
Reserved for future high priority task 
crash codes.