OPC unified architecture - Part 5: Information Model
OPC unified architecture - Part 5: Information Model
IEC 62541-5:2026 This edition includes the following significant technical changes with respect to the previous edition: a) Annex B has been removed and used to create IEC 62451-16; b) Annex C has been removed and used to create IEC 62451-20; c) currency information model has been added; d) information model for Interfaces and AddIns has been added; e) information model for Method Metadata has been added; f) MaxSessions, MaxSubscriptions, and MaxMonitoredItems have been added to capabilities; g) information model for ordered list of objects has been added; h) PortableQualifiedName and PortableNodeId DataTypes have been added; i) UriString DataType has been added; j) SemanticVersionString DataType has been added; k) AssociatedWith Reference Type has been added; l) ConfigurationVersion Property has been added to NamespaceMetadataType; m) AuditClientEventType and AuditClientUpdateMethodResultEventType have been added; n) ModelVersion has been added to NamespaceMetadataType; o) NoTransparentBackupRedundancyType has been added to support a Primary/Standby use case; p) BitFieldType and BitFieldDefinitionType have been added. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
The IEC 62541-5:2026 standard, published by the International Electrotechnical Commission (IEC), defines the OPC Unified Architecture (OPC UA) Information Model. This fourth edition introduces significant technical revisions improving the way data and metadata are structured and managed within the OPC UA ecosystem. OPC UA is a globally recognized framework for industrial interoperability, allowing seamless integration and communication across diverse automation systems and devices.
Key enhancements in this 2026 release include new data types, expanded information models, and refined capabilities to support advanced industrial automation scenarios with increased reliability and flexibility. The standard is essential for developers, system integrators, and manufacturers aiming to implement interoperable, secure, and scalable industrial communication architectures.
IEC 62541-5:2026 serves as a cornerstone for engineers and software developers building OPC UA-compliant systems across various industries including manufacturing, energy, building automation, and utilities. Practical applications include:
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The 2026 update of IEC 62541-5 aligns closely with other standards expanding and complementing OPC UA functionality:
These associated standards, when combined, provide a comprehensive and robust industrial interoperability infrastructure, facilitating seamless data exchange and unified system management worldwide.
By adopting IEC 62541-5:2026, stakeholders ensure adherence to the latest international best practices for OPC UA information modeling, fostering interoperability, security, and scalability in industrial automation and digital transformation projects.