Advantages of OPC Unified Architecture

The OPC Unified Architecture is an operating System independent standard for communication of different client – server systems via different network type.

Safe and robust connection due to

  • Signing
  • Encryption
  • User authentication
  • Detection of transmission errors
  • Resending of lost messages

Self-Description of the Server

  • Transfer of the node structure
  • Transmission of semantics



The specifications of security mechanisms in the protocol ensure secure, robust and authenticated message transmission between client and server systems. The specification of a new address space, which contains not only data but also its semantics and description, created a connection from the process level (controllers, plant level) up to management systems.