The next step is to configure virtual points to track redundant server status during system operation. The points have the following requirements:
Naming convention is:
MASTER_PTM_RP for
the primary server
SLAVE_PTM_RP for the secondary
server
Type is virtual
Class is Digital
Calculation for the point is None
(default).
A point will take on a value of:
1 if the server it
represents is currently operating as the primary server
0 if the server is the
secondary server
The current Primary Point Manager will only change the values. This implies that point updates to the global points will occur when:
There is a redundant server
failure
Redundant servers are synchronized
at startup
An orderly transition from
secondary to primary server occurs.
Important: If you are using point lines
in Trending that automatically look for the data source, you must
configure MASTER_PTM_RP and SLAVE_PTM_RP. These are the points that
Trending needs to failover to the secondary server if the primary
is down.
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Base system configuration. |
