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IEC 62541-12-ed.2.0
OPC unified architecture - Part 12: Discovery and global services
Translate name
STANDARD published on 22.12.2025
The information about the standard:
Designation standards: IEC 62541-12-ed.2.0
Publication date standards: 22.12.2025
SKU: NS-1253508
The number of pages: 142
Approximate weight : 457 g (1.01 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 62541-12-ed.2.0 :
IEC 62541-12:2025 specifies how OPC Unified Architecture (OPC UA) Clients and Servers interact with DiscoveryServers when used in different scenarios. It specifies the requirements for the LocalDiscoveryServer, LocalDiscoveryServer-ME and GlobalDiscoveryServer. It also defines information models for Certificate management, KeyCredential management and AuthorizationServices. Annex A informatively discusses deployment and configuration aspects. Annex B defines NodeSet and numeric NodeIds. Annex F provides installation rules for the LDS. Annex H compares the Certificate management defined in this document with IETF RFC 7030. This second edition cancels and replaces the first 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) addition of a "Quantity Model" which can be referenced from EngineeringUnit Properties. The model defines quantities and assigned units. In addition it provides alternative units and the conversion to them; b) addition of rules for ValuePrecision Property: • can also be used for other subtypes like Duration and Decimal. • additional rules when ValuePrecision has negative values. IEC 62541-12:2025 specifie la maniere dont les Clients et les Serveurs de lArchitecture Unifiee OPC (OPC UA) interagissent avec les DiscoveryServers lorsquils sont utilises dans differents scenarios. Elle definit les exigences pour le LocalDiscoveryServer, le LocalDiscoveryServer-ME et le GlobalDiscoveryServer. Elle definit egalement les modeles dinformation pour la gestion des Certificats, la gestion des KeyCredentials et les AuthorizationServices. LAnnexe A, informative, examine les aspects relatifs au deploiement et a la configuration. LAnnexe B definit le NodeSet et les NodeIds numeriques. LAnnexe F fournit les regles dinstallation du LDS. LAnnexe H compare la gestion des Certificates definie dans le present document a la IETF RFC 7030. Cette deuxieme edition annule et remplace la premiere edition parue en 2020. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) ajout dun "modele de quantite" qui peut etre reference a partir des proprietes EngineeringUnit. Le modele definit les grandeurs et les unites attribuees. En outre, il fournit des unites alternatives et les regles de conversion vers ces unites; b) ajout de regles pour la propriete ValuePrecision: • peut egalement etre utilise pour dautres sous-types tels que Duration et Decimal; • regles supplementaires lorsque ValuePrecision a des valeurs negatives.
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