Standard IEC 62541-8-ed.3.0 22.6.2020 preview

IEC 62541-8-ed.3.0

OPC Unified Architecture - Part 8: Data Access

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STANDARD published on 22.6.2020


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The information about the standard:

Designation standards: IEC 62541-8-ed.3.0
Publication date standards: 22.6.2020
SKU: NS-996931
The number of pages: 102
Approximate weight : 337 g (0.74 lbs)
Country: International technical standard
Category: Technical standards IEC

Annotation of standard text IEC 62541-8-ed.3.0 :

IEC 62541-8:2020 is available as IEC 62541-8:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62541-8:2020 is part of the overall OPC Unified Architecture (OPC UA) standard series and defines the information model associated with Data Access (DA). It particularly includes additional VariableTypes and complementary descriptions of the NodeClasses and Attributes needed for Data Access, additional Properties, and other information and behaviour. The complete address space model, including all NodeClasses and Attributes is specified in IEC 62541-3. The services to detect and access data are specified in IEC 62541-4. This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) added new VariableTypes for AnalogItems; b) added an Annex that specifies a recommended mapping of OPC UA Dataccess to OPC COM DataAccess; c) changed the ambiguous description of "Bad_NotConnected"; d) updated description for EUInformation to refer to latest revision of UNCEFACT units.
IEC 62541-8:2020 est disponible sous forme de IEC 62541-8:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis ledition precedente.
LIEC 62541-8:2020 fait partie integrante de la serie de normes generales sur larchitecture unifiee OPC (OPC UA). Elle definit le modele dinformation associe a lAcces aux donnees (DA). Elle specifie notamment des VariableTypes supplementaires et fournit des descriptions complementaires concernant les NodeClasses et attributs necessaires pour lAcces aux donnees, ainsi que des proprietes supplementaires et dautres parametres relatifs aux informations et au comportement. Le modele despace dadresses complet, comprenant toutes les NodeClasses et tous les Attributs, est specifie dans lIEC 62541-3. Les services de detection et dacces aux donnees sont specifies dans lIEC 62541-4. Cette troisieme edition annule et remplace la deuxieme edition parue en 2015. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) ajout de nouveaux VariableTypes pour les AnalogItems; b) ajout dune annexe qui specifie le mapping recommande entre OPC UA DataAccess et OPC COM DataAccess; c) modification de la description ambigue de "Bad_NotConnected"; d) mise a jour de la description de EUInformation pour renvoyer a la derniere revision des unites CEFACT-ONU.

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