Once this is complete, two equivalent servers/stations will be available again. When a failed partner is restored, all of the archived process values, messages (including statuses, acknowledgements, lists and comments), data from the user archive of the failure period and internal tags are automatically synchronized with the partner in the background – without affecting the running system. This ensures continuous plant visualization and operation on every operator station. In client/server mode, the clients are automatically switched from the failed server to the redundant partner.
When one of the two WinCC stations fails, the other takes over the archiving of messages, process data and user data. The clients that are connected to the servers can be distributed to the servers as required, which leads to a reduced load. Normally, two WinCC stations or process data servers run completely in parallel, which means each station has its own process connection and own archives.
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