8. C300 Redundancy operation
8.5. Redundancy parameters
R500
April 2017
Series 8 C300 Controller User's Guide
Honeywell
215
Inhibit Sync Reason
Description
Platform FB Load State
Initial-sync is not allowed until after the C300 FB has been loaded
to the controller.
CEE Load Or Delete
Synchronization cannot be maintained during the database
initialization that occurs upon CEE FB load or delete. This is a
transient inhibit sync reason that is usually not seen.
Link X Load State
Initial-sync is not allowed to commence until after all link function
blocks have been loaded, where X indicates the link number. This
is a persistent inhibit sync reason is negated upon load of the link
function block to the controller.
NVS Commands
Synchronization is aborted and/or initial-sync is inhibited during the
database initialization that occurs upon I/O Link FB commanded
NVS compaction.
Partner Absent
Initial-sync is not applicable without a redundant partner.
Partner Not Compatible
Initial-sync is not applicable with an incompatible redundant partner.
Partner Request
The redundant partner has requested initial-sync to be inhibited.
Refer to the partner's RDNINHIBITSYNC parameter for the actual
reason.
FTE Cable Status
The secondary inhibits sync due to dual-FTE-cable disconnect.
This persistent inhibit sync reason can only be canceled by
restoring FTE communications with the secondary.
Unsupported Hardware
Version
Initial-sync is inhibited for controller hardware version that does not
support controller redundancy.
Initial Sync Progress - RDNSYNCPROG
The RDNSYNCPROG parameter indicates the percentage of initial-sync completion.
This is set to 0 when initial sync is not in progress and it is set to 100 when initial-sync is
complete.
Maximum Initial Synchronization Time - RDNISTIMEMAX
The RDNISTIMEMAX parameter indicates the maximum initial synchronization time in
seconds. This is a high-water mark for all the previous successfully completed initial-
sync attempts. This value is reset upon issuing the C300 Platform block's Stats Reset
command.