Spontaneous archives gets a new record when a switch StandBy Server to Primary server is done.  

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• Spontaneous historian stores outdated values when a server switch to a previously active server is done

  Summary If the server changed several times it could happen that outdated values were archived. Description If the server changed several times it could happen that outdated values were archived. Information Deny to switch the server and back when ...

• Under specific circumstances during redundancy switch-over a value received from the PLC on the standby server may be lost

  Summary With a redundant runtime on server and standby server that are both under heavy load the server, the runtime on the standby server may fail to record a value from the PLC if this value is received from the PLC after the server has failed and ...

• When Standby gets Server, Message Control active status is reset to the default project setting

  Summary When Standby gets Server, Message Control active status is reset to the default project setting instead of the currently used Message Control mode. Description When Standby gets Server, Message Control active status is reset to the default ...

• Unnecessary messages created on standby server after primary server takes over.

  Summary Unnecessary messages created on standby server after primary server takes over before initial messages(created on standby server) were acknowledged. Those messages stay in its message control queue, and continuously create CEL entries until ...

• FAQ: What are Installation and Security considerations of the zenon Smart Server and Smart Client?

  The attached document (English only) describes in some detail the specifics of the zenon Smart Server Application and the zenon Smart Client Application. Also a short explanation of security features and components is given. More information about ...