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IEC 62541-11-ed.3.0
OPC Unified Architecture - Part 11: Historical Access
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STANDARD published on 23.12.2025
The information about the standard:
Designation standards: IEC 62541-11-ed.3.0
Publication date standards: 23.12.2025
SKU: NS-1253507
The number of pages: 73
Approximate weight : 219 g (0.48 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Industrial process measurement and controlMultilayer applications
Annotation of standard text IEC 62541-11-ed.3.0 :
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. IEC 62541-11: 2025 definit le Modele dInformation associe a lAcces a lhistorique (HA, Historical Access). Elle inclut en particulier des descriptions supplementaires et complementaires des NodeClasses et des Attributs necessaires pour lAcces a lhistorique, des Proprietes normalisees supplementaires et dautres informations et comportements. Le Modele complet de lAddressSpace comprenant toutes les NodeClasses et tous les Attributs est specifie dans lIEC 62541-3. Le Modele dinformation predefini est defini dans lIEC 62541-5. Les Services permettant de detecter et dacceder aux donnees et evenements historiques, ainsi quune description des types ExtensibleParameter, sont specifies dans lIEC 62541-4. Le present document inclut une fonctionnalite permettant de calculer et de renvoyer des Agregats (minimum, maximum, moyenne, etc.). Le Modele dinformation et la fonction concrete des Agregats sont definis dans lIEC 62541-13. Les conventions pour les Clients dAcces a lhistorique sont donnees, a titre informatif, a lAnnexe A. Cette quatrieme edition annule et remplace la troisieme edition parue en 2020. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) une fonctionnalite qui permet de recuperer les evenements modifies a ete ajoutee; b) un Evenement qui indique quand un remplissage a eu lieu a ete ajoute; c) un nouveau ReferenceType qui peut etre utilise pour indiquer un noud externe a ete defini; d) le texte a ete ameliore afin de mieux expliquer le concept dannotation et de supprimer les explications contradictoires; e) une configuration dhistorique par defaut (et lendroit ou la trouver) a ete definie; f) lHistoricalEventConfigurationType, qui fournit des informations de configuration generale sur le stockage des Evenements historiques, a ete ajoute; g) le texte a ete mis a jour et des champs facultatifs ont ete ajoutes a lobjet de configuration HA afin de permettre la definition de la configuration pour la collecte de donnees periodique, et pas seulement pour la collecte fondee sur les exceptions; h) un ObjectType qui peut etre utilise pour la collecte devenements externes a ete prevu, ainsi quun exemple de la facon dont les historiques peuvent etre configures.
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