BS EN IEC 62541-3:2020

What is BS EN IEC 62541-3 ‒ OPC UA Address Space Model about?  

BS EN IEC 62541-3 is the third part of an international multi-series standard that covers attributes of OPC Unified Architecture. 

BS EN IEC 62541-3 defines the OPC Unified Architecture (OPC UA) address space and its Objects. It is the OPC Unified Architecture meta model on which OPC UA information models are based. 

BS EN IEC 62541-3 stipulates the technical specifications for OPC Unified Architecture (OPC UA) address space such as terms, definitions, abbreviated terms, conventions, Address-Space concepts, Standard Node-Classes, Type Model for Object-Types and Variable-Types, Standard Reference-Types, Standard Data-Types, Standard Event-Types, etc. 

Who is BS EN IEC 62541-3‒ OPC UA Address Space Model for? 

BS EN IEC 62541-3 on OPC UA Address Space Model is useful for: 

• IT companies 
• Programmers 
• Software developers 
• Data analysts  
• Data analysis companies 
• MS office user companies 

Why should you use BS EN IEC 62541-3‒ OPC UA Address Space Model?  

OPC Unified Architecture (OPC UA) can be defined as a machine-to-machine communication protocol used for industrial automation. It was developed by the OPC Foundation. The OPC UA platform is a platform-independent service-oriented architecture that combines discrete OPC Classic specifications into an expandable framework. 

BS EN IEC 62541-3 lays out elaborated information about the address space model for OPC UA where all data is represented hierarchically (e.g. files and folders) that allows OPC Clients to come across simple and complex structures of OPC Unified Architecture (OPC UA). 

BS EN IEC 62541-3 makes provisions for users to achieve the design specification goals of the OPC UA Address Space Model that allows them to enjoy the benefits such as functional equivalence, gives platform independence, and provides security to enable them for encryption, authentication, and auditing. It also enables users to have a stretchable structure that has the ability to add new features without affecting existing applications as well as comprehensive information modeling for defining complex information.  

What’s changed since the last update? 

BS EN IEC 62541-3:2020 supersedes BS EN 62541‑3:2015, which is withdrawn. BS EN IEC 62541-3:2020 includes some technical changes with respect to the previous edition: 

• Added a new improved approach for exposing structure definitions. An Attribute on the Data Type Node now simply contains a binary description 
• Added new flags for Variables to indicate atomicity when reading or writing 
• Added Roles and Permissions to allow configuration of a role-based authorization 
• Added new data types: “Union”, “Decimal”, “options”, “Date String”, “Time String”,  “Duration String”, Normalized String”, “Decimal String”, and “Audio Data Type” 
• Added definition on how to use the Modelling Rules Optional Place Holder and Mandatory Place Holder for Methods