Controller Does Not Synchronize With Backup - Honeywell C300 User Manual

10. C300 Controller Troubleshooting
10.4. Fixing common problems
Solution

Controller does not synchronize with backup

Diagnostic Check
Cause 1
Solution
Cause 2
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Cause 2
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no FTE Diagnostic messages over the sample interval of this
diagnostic. In this case, the C300 Controller's FTE Receive Fault
Diagnostic will indicate a spurious fault. The spurious alarm
generated by the FTE Receive Fault Diagnostic is a relatively minor
side effect, in the case of a network storm. A network storm is
signaled by other alarms in the system.
Unless you suspect that one of the causes described above exists and is
resulting in a spurious indication, you should replace the C300
Controller Module exhibiting this diagnostic at your earliest convenience.
When this fault exists, network redundancy for this node no longer is
working. See C300 Controller module and IOTA replacem ent
Primary controller cannot synchronize with backup.
In the Monitoring tab, double-click the primary C300 icon to display its
Parameters configuration form. Click the Redundancy tab to display it
and check the Inhibit Sync Reason
controller not achieving synchronization.
Troubleshoot to correct condition for inhibiting sync.
Redundancy cable bad.
Replace redundancy cable. Check to see if controllers synchronize.
Controller IOLINKS may be configured for Series 8 I/O.
IOL cables may be disconnected.
Reconnect cables to controller IOTA.
Backup controller bad.
Replace controller module. Refer to the section
and IOTA replacement for details.
Check to see if controllers synchronize.
Backup IOTA bad.
Replace the IOTA. Reinstall the original backup controller module on
the new IOTA. Refer to the section
replacement for details.
Check to see if controllers synchronize.
Primary controller module bad.
Series 8 C300 Controller User's Guide
Honeywell
parameter for a description for the
C300 Controller module
C300 Controller module and IOTA
for details.
R500
April 2017