BS EN IEC 62541-6:2020

What is BS EN IEC 62541‑6 about? 

BS EN IEC 62541‑6 is a sixth part of the OPC unified architecture multi-series. BS EN IEC 62541‑6 deals with mappings for OPC unified architecture. 

BS EN IEC 62541‑6 specifies the OPC unified architecture (OPC UA) mapping between the security model described in IEC TR 62541‑2, the abstract service definitions specified in IEC 62541‑4, the data structures defined in IEC 62541‑5 and the physical network protocols that can be used to implement the OPC UA specification. 

Who is BS EN IEC 62541‑6 for? 

BS EN IEC 62541‑6 on OPC unified architecture mapping is applicable to: 

• Organization shifting to service-oriented architecture 
• Software development teams 
• Cybersecurity teams 

Why should you use BS EN IEC 62541‑6? 

OPC unified architecture is an interoperability standard for transferring data securely and reliably in industrial automation and other industries. It is a platform-independent, service-oriented architecture that ensures a smooth flow of data across devices from various manufacturers. 

BS EN IEC 62541‑6 provides extensive information on data encoding, message security protocols, transport protocols, normative contracts which allows you to integrate data from different data servers into a single OPC unified architecture. 

What’s changed since the last update? 

BS EN IEC 62541‑6:2020 supersedes BS EN 62541‑6:2015, which will be withdrawn. 

Changes in BS EN IEC 62541‑6:2020 include – 

• Encoding - added JSON encoding for PubSub (non-reversible), added JSON encoding for Client/Server (reversible) and added support for optional fields in structures 
• Transport mappings - added WebSocket secure connection – WSS, added support for reverse connectivity, added support for session-less service invocation in HTTPS 
• Deprecated Transport (missing support on most platforms): SOAP/HTTP with WS-SecureConveration (all encodings) 
• Added support for Unions to NodeSet Schema 
• Added batch operations to add/delete nodes to/from NodeSet Schema