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Redundancy connections to controllers will prevent data loss in case of connection interrupting.
A controller needs to have two network adapters. The computer need to have two network adapters, too.
For redundancy connections two or three sets of connection parameters will be defined.
At runtime all connections will be established. One will be master, this will handle the data. The second connection will be the reserve. Its status will be checked only. There are some options for the redundancy:
In case of interrupting the master all elements will be switched to the slave.
This will work transparently to the OPC application. The items don't deliver errors.
Over OPC the status of both connections can be checked. Details here. Technical DetailsThere are two modes of operation
Switch connectionsFor testing purposes the active connection can be switched by the OPC client.
Hints:
See also Redundancy Settings
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