C300 Redundancy-Related Notifications; Table 13 Redundancy-Related Notifications - Honeywell C300 User Manual

8. C300 Redundancy operation

8.8. C300 Redundancy-related notifications

8.8 C300 Redundancy-related notifications
This section provides listings of redundancy-related notifications implemented for the
C300 Controller. Table 13 lists notifications along with their descriptions that may occur
during controller synchronization and switchover operations.
Notification
Backup State The secondary generates the Backup State Change Event
as part of event regeneration. A transition to the Backup
State only occurs as part of startup or a redundancy role
change. In both of these cases, any previously existing
notification connection is broken, a new notification
connection is reformed, and event regeneration is
commanded.
Not Synchronized The primary and secondary are configured for redundancy
but the redundant pair is not synchronized or not in standby.
The primary is configured for redundancy through C300
block load of the MODISREDUN parameter. A secondary
can only be in the secondary role if, retention startup
remembered that it was previously configured redundant,
and the C300 is configured with the even Device Index.
The "Not Synchronized" alarm returns to normal upon
configuring the primary at the odd Device Index as non-
redundant or upon entering the Synchronized or Standby
state.
Redun Incompatible Both the primary and secondary controllers generate this
Partner notification upon determining that their partner module is not
compatible for attempting initial-sync.
Redun No Partner Both the primary and secondary controllers generate this
notification when the partner is not present.
Note that the primary controller only generates this
notification when it is either explicitly or implicitly configured
for redundant behavior. Explicit redundancy configuration
occurs when the C300 block is loaded with MODISREDUN
set ON, and implicit redundancy configuration occurs in the
absence of any configuration, (C300 in the NODB state).
Redun Non- Only the controller explicitly configured non-redundant
Redundant generates this notification when the partner is not present.
Redun Partner Both the primary and secondary controllers generate this
notification upon detecting a compatible partner visible
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Table 13 Redundancy-Related Notifications

Description
Series 8 C300 Controller User's Guide
Honeywell
RDNSYNCSTATE
INCOMPATIBLE
NOPARTNER
NOPARTNER
PARTNERVISBL
R500
April 2017