The design of OPC UA includes several elements that contribute to the robustness of OPC UA communication and that are integrated in different layers of the OPC UA Framework. This includes
- Error detection and handling on transport and service level,
- Auditing – i.e., the support for security audit trails with traceability between Client and Server audit logs., and
- Availability of diagnostic information.
Note – The Robustness features are specified as part of the Services in OPC UA Part 4.