Honeywell 900 - Communication Diagnostics; Redundant Overview; Table 25 Redundant Overview

Main Menu
Diagnostics Communication Diagnostics
48 900 Control Station User Guide Revision 9
May 2014
Communication Diagnostics
This links to the main Communications menu. See page 20.
Redundant Overview
This display summarizes the status of all of the major components of a redundant system.
Table 25 Redundant Overview
Item Status Possible Cause Controller Action What to do
RESERVE
STATUS
RESERVE
AVAILABLE
Normal operation N/A N/A
RESERVE NOT
AVAILABLE
1. Reserve not
installed in rack.
2. Power not applied
to reserve CPU
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
a)
b)
The lead controller
will continue to
control the process,
but failover is not
possible.
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.
REDUNDANCY
STATUS
GOOD
Normal operation N/A N/A
NO RSM MODULE
DETECTED
Switch on RSM is set
between two positions.
RSM Module is not
inserted
RSM Module has failed
The controller will
continue to operate
with a missing RSM.
Automatic failover is
still possible if
required.
Make sure switch is in desired
position
Install RSM module
Replace RSM
RSM SWITCH IS
BAD
Switch is indicating an
invalid position
The controller will
continue to operate
with a bad RSM.
Automatic failover is
still possible if
required.
c)
Replace RSM