OPC UA redundancy provides a standard manner for OPC UA Clients to determine which OPC UA Servers are redundant and the status of the Servers. In OPC UA redundant system all redundant servers provide:

  • an identical information model,
  • an identical instance address space.

The structures, redundancy objects and redundancy behaviours are described in OPC 10000-4 and further defined in OPC 10000-5.