5. Series 8 I/O
Configuration Form Reference
5.4. Failure conditions and switchover
R500
Series 8 I/O User's Guide
109
April 2017
Honeywell
If Secondary redundancy state is
Then, the Secondary module
Syncd
Synchronized
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.
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.
Table 28 Failure conditions and switchover
Failure conditions that result in
a switchover
Failure conditions that do not
result in a switchover
Power to Primary module fails.
One or all cables fail.
An IOLINK to the Primary Series
8 module is lost.
One or all network conditioners fail.
Primary Series 8 module fails.
All supplied power to the link 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.