IEC 62541-11:2025
OPC unified architecture - Part 11: Historical Access
OPC unified architecture - Part 11: Historical Access
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 73
- Дата публикации:
- 23 декабря 2025 г.
- Издание:
- IEC IS 62541 edition 3 version 1
- ICS:
- 25.040.40
IEC 62541-11: 2025 defines the Information Model associated with Historical Access (HA). It particularly includes additional and complementary descriptions of the NodeClasses and Attributes needed for Historical Access, additional standard Properties, and other information and behaviour. The complete AddressSpace Model including all NodeClasses and Attributes is specified in IEC 62541‑3. The predefined Information Model is defined in IEC 62541‑5. The Services to detect and access historical data and events, and description of the ExtensibleParameter types are specified in IEC 62541‑4. This document includes functionality to compute and return Aggregates like minimum, maximum, average etc. The Information Model and the concrete working of Aggregates are defined in IEC 62541‑13. Conventions for Historical Access Clients are informatively provided in Annex A. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) a functionality has been added to support retrieving of modified events; b) an Event has been added to indicate when a backfill occurred; c) a new ReferenceType that can be used to indicate an external node has been defined; d) the text has been improved to better explain the concept of annotation and remove conflicting explanations; e) a default historian configuration (and where to find it) has been defined; f) HistoricalEventConfigurationType, which provides general configuration information about the historical Event storage, has been added; g) the text has been updated and optional fields have been added to HA configuration object to allow configuration to be defined for periodic data collection, not just for exception-based collection; h) an ObjectType that can be used for external event collection has been provided as well as an example how historians can be configured.
Abstract
Overview
IEC 62541-11:2025 - OPC Unified Architecture (OPC UA) Part 11: Historical Access defines the Information Model and behavior needed to discover, access, configure and manage historical data and events in OPC UA AddressSpaces. This 2025 fourth edition is a technical revision that expands how historians, historians’ configurations and clients interact with historical records, including support for aggregates (min, max, average), modified events, annotations and default historian configuration.
Key topics and technical requirements
- Historical Information Model
- Definitions for HistoricalNodes, HistoricalDataNodes, HistoricalEventNodes, attributes, and standard properties needed for historical access.
- Specifications for Annotations and how they are exposed as properties of historical nodes.
- History services and parameters
- Service usage for reading historical raw/processed data, events, modified events, and annotations (see HistoryReadDetails and related structures).
- Continuation points, timestamps handling, bounding values and time-domain semantics.
- Configuration and capabilities
- HistoricalDataConfigurationType and HistoricalEventConfigurationType for configuring storage and collection (exception-based and periodic collection).
- HistoryServerCapabilitiesType to expose server/historian capabilities and a default historian configuration location.
- Event and audit handling
- Historical event storage, AuditHistory event types and new event to indicate backfill occurrences.
- Support for retrieving modified events and external event collection object types.
- Aggregates and processing
- Functionality to compute and return aggregates; Information Model and aggregate behavior referenced in IEC 62541-13.
- External sources and references
- New ReferenceType to indicate external nodes and guidance for external history sources.
- Client guidance
- Informative Annex A providing Historical Access client conventions, timestamps and best practices.
Applications and who uses it
- Industrial automation vendors building OPC UA servers with historian capabilities.
- Software developers and integrators creating historical clients, HMIs, SCADA, MES and analytics platforms that read/modify historical data and events.
- System architects defining historian configuration, data retention, backfill and audit policies.
- Compliance and operations teams needing reliable event audit trails, annotations and aggregate reporting.
Related standards
- IEC 62541-3 - AddressSpace Model (complete NodeClasses and Attributes)
- IEC 62541-4 - Services and ExtensibleParameter types for historical read/write
- IEC 62541-5 - Predefined Information Model
- IEC 62541-13 - Aggregates Information Model and behavior
Keywords: IEC 62541-11:2025, OPC UA Historical Access, historian configuration, historical data, historical events, OPC UA aggregates, annotations, HistoryReadDetails.
Технические детали
- Технический комитет
- SC 65E - Devices and integration in enterprise systems
- SKU
- IEC 62541-11:2025
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