The @RedundantServerState tag indicates the redundancy status of
the server - this is an internal WinCC system tag. This can be
found among the tag management's internal tags.
The @RedundantServerState tag can have the following values:
- Value 1: This server is the master.
- Value 2: This server is the standby.
- Value 3: This server is faulty.
- Value 4: This server is standalone.
The redundancy option also comes with its own system tags. They
are automatically created when redundancy is created.