Failure Conditions And Switchover; Configuration Tools; Using Control Builder To Create Control Strategies; Table 28 Failure Conditions And Switchover - Honeywell Series 8 I/O User Manual

If Secondary redundancy state is
Syncd
Synchronized
5.4

Failure conditions and switchover

ATTENTION
When any failure that results in a switchover occurs in a Secondary module,
the Secondary module loses synchronization.
In addition to the failure conditions, this event is reported as diagnostic
notification:
 Loss of view of redundant partner on network.
 Loss of private path connection from Primary to Secondary (lonely event).
The following table identifies failure conditions and the switchover.
Failure conditions that result in
a switchover
Power to Primary module fails.
An IOLINK to the Primary Series
8 module is lost.
Primary Series 8 module fails.
5.5

Configuration tools

Using Control Builder to create control strategies

The Experion Control Builder application creates control strategies that use Series 8 I/O
data. In developing a valid control strategy, the following activities are required to be
supported by Control Builder.
R500
April 2017
Can assume the Primary state upon
switchover. In this state, the database in the
Secondary is aligned with the database in the
Primary. The Secondary closely tracks
database changes to maintain its
synchronization with the database of the
Primary. Otherwise, the Secondary reverts to a
Not Synchronized state.

Table 28 Failure conditions and switchover

One or all cables fail.
One or all network conditioners fail.
All supplied power to the link fails.
Series 8 I/O User's Guide
Honeywell
5. Series 8 I/O Configuration Form Reference
5.4. Failure conditions and switchover
Then, the Secondary module
Failure conditions that do not
result in a switchover
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