Table 27 Details Of Lead Or Reserve Cpu Diagnostics Error Status Messages - Honeywell 900 User Manual

Lead/Reserve CPU Diagnostics

Table 27 Details of Lead or Reserve CPU diagnostics error status messages

Class Status
RESERVE RESERVE
STATUS AVAILABLE
RESERVE NOT
AVAILABLE
Revision 9
May 2014
Possible Cause Controller Action
Normal operation N/A
1. Reserve not installed The lead controller
in rack. will continue to
control the process,
2. Power not applied to
but failover is not
reserve CPU
possible.
3. Neither lead nor
reserve CPU has a
valid configuration
database
4. Firmware mismatch
(lead and reserve
CPUs have different
firmware revisions
5. Database not
synchronized with
the lead
900 Control Station User Guide
Main Menu
Diagnostics
Fix
N/A
Install reserve CPU
Apply power to reserve CPU
Download a configuration and cold
start the controller
Perform a firmware upgrade so
both CPUs have the same version
Replace the reserve CPU. If this
doesn't help, replace the lead
CPU. If this doesn't help, replace
the backplane.
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