EN IEC 62541-3:2020

OPC Unified Architecture - Part 3: Address Space Model

IEC 62541-3:2020 is available as IEC 62541-3:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62541-3:2020 defines the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This document is the OPC UA meta model on which OPC UA information models are based. This third edition cancels and replaces the second edition published in 2015. This edition includes the following significant technical changes with respect to the previous edition: a) Added new improved approach for exposing structure definitions. An Attribute on the DataType Node now simply contains a binary description. b) Added new flags for Variables to indicate atomicity when reading or writing. c) Added Roles and Permissions to allow configuration of a role-based authorization. d) Added new data types: “Union”, “Decimal”, “OptionSet”, “DateString”, “TimeString”, “DurationString”, NormalizedString”, “DecimalString”, and “AudioDataType”. e) Added definition on how to use the ModellingRules OptionalPlaceHolder and MandatoryPlaceHolder for Methods. f) Added optional Properties “MaxCharacters” and “MaxByteStringLength” to Variable Nodes.

OPC Unified Architecture - Teil 3: Adressraummodell

Architecture unifiée OPC - Partie 3: Modèle d'espace d'adressage

IEC 62541-3:2020 est disponible sous forme de IEC 62541-3:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 62541-3:2020 définit l'AddressSpace de l'Architecture Unifiée OPC (OPC UA) et ses Objets. Le présent document correspond au métamodèle OPC UA sur lequel se fondent les modèles d'information OPC UA. Cette troisième édition annule et remplace la deuxième édition parue en 2015. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) ajout d'une nouvelle approche améliorée afin de présenter les définitions de la structure (un Attribut sur le Nœud du DataType contient désormais simplement une description binaire); b) ajout de nouveaux fanions pour les Variables afin d'indiquer l'atomicité à la lecture ou à l'écriture; c) ajout de Rôles et d'Autorisations afin de permettre la configuration d'une autorisation fondée sur les rôles; d) ajout de nouveaux types de données: "Union", "Decimal", "OptionSet", "DateString", "TimeString", "DurationString", "NormalizedString", "DecimalString" et "AudioDataType"; e) ajout d'une définition expliquant comment utiliser les OptionalPlaceHolder et MandatoryPlaceHolder de ModellingRules pour les Méthodes; f) ajout de Propriétés facultatives "MaxCharacters" et "MaxByteStringLength" aux Nœuds de variable.

Enotna arhitektura OPC - 3. del: Model naslovnega prostora (IEC 62541-3:2020)

General Information

• Status: Published
• Publication Date: 03-Sep-2020
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100 - Open systems interconnection (OSI)
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65E - IEC_SC_65E
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 04-Sep-2020
• Completion Date: 04-Sep-2020
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN IEC 62541-3:2020 - OPC unified architecture - Part 3: Address Space Model (IEC 62541-3:2020)

Relations

• Replaces: EN 62541-3:2015 - OPC unified architecture - Part 3: Address Space Model
• Effective Date: 08-Sep-2020
• Revised: prEN IEC 62541-3:2024 - OPC unified architecture - Part 3: Address space model
• Effective Date: 31-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2020
Nadomešča:
SIST EN 62541-3:2015
Enotna arhitektura OPC - 3. del: Model naslovnega prostora (IEC 62541-3:2020)
OPC unified architecture - Part 3: Address Space Model (IEC 62541-3:2020)
OPC Unified Architecture - Teil 3: Adressraummodell (IEC 62541-3:2020)
Architecture unifiée OPC - Partie 3: Modèle d'espace d'adressage (IEC 62541-3:2020)
Ta slovenski standard je istoveten z: EN IEC 62541-3:2020
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62541-3

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 35.100.05; 25.040.40 Supersedes EN 62541-3:2015 and all of its amendments
and corrigenda (if any)
English Version
OPC Unified Architecture - Part 3: Address Space Model
(IEC 62541-3:2020)
Architecture unifiée OPC - Partie 3: Modèle d'espace OPC Unified Architecture - Teil 3: Adressraummodell
d'adressage (IEC 62541-3:2020)
(IEC 62541-3:2020)
This European Standard was approved by CENELEC on 2020-08-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62541-3:2020 E

European foreword
The text of document 65E/715/FDIS, future edition 3 of IEC 62541-3, prepared by SC 65E "Devices
and integration in enterprise systems" of IEC/TC 65 "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-05-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-08-12
document have to be withdrawn
This document supersedes EN 62541-3:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 62541-3:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62541-11 NOTE Harmonized as EN 62541-11

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC/TR 62541-1 - OPC unified architecture - Part 1: CLC/TR 62541-1 -
Overview and concepts
IEC 62541-4 - OPC Unified Architecture - Part 4: - -
Services
IEC 62541-5 - OPC Unified Architecture - Part 5: - -
Information Model
IEC 62541-6 - OPC Unified Architecture - Part 6: - -
Mappings
IEC 62541-8 - OPC Unified Architecture - Part 8: EN IEC 62541-8 -
Data Access
ISO/IEC/IEEE 2011 Information technology - - -
60559 Microprocessor Systems - Floating-
Point arithmetic
ISO 639 series Code for the representation of - -
names of languages
ISO 3166 series Codes for the representation of - -
names of countries
ISO 8601 series - -
IETF RFC 5646 - Tags for Identifying Languages - -
Unicode Standard - Unicode Normalization Forms - -
Annex #15
W3C XML Schema - Data Types - -
Definition Language
(XSD) Part 2
TAI - International Atomic Time - -

IEC 62541-3 ®
Edition 3.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 3: Address Space Model
Architecture unifiée OPC –
Partie 3: Modèle d'espace d'adressage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-8580-0

– 2 – IEC 62541-3:2020 © IEC 2020
CONTENTS
FOREWORD . 10
1 Scope . 12
2 Normative references . 12
3 Terms, definitions, abbreviated terms and conventions . 13
3.1 Terms and definitions . 13
3.2 Abbreviated terms . 14
3.3 Conventions . 14
3.3.1 Conventions for AddressSpace figures . 14
3.3.2 Conventions for defining NodeClasses. 15
4 AddressSpace concepts . 16
4.1 Overview. 16
4.2 Object Model . 16
4.3 Node Model . 16
4.3.1 General . 16
4.3.2 NodeClasses . 17
4.3.3 Attributes . 17
4.3.4 References . 17
4.4 Variables . 18
4.4.1 General . 18
4.4.2 Properties . 18
4.4.3 DataVariables . 18
4.5 TypeDefinitionNodes . 19
4.5.1 General . 19
4.5.2 Complex TypeDefinitionNodes and their InstanceDeclarations . 20
4.5.3 Subtyping . 21
4.5.4 Instantiation of complex TypeDefinitionNodes . 21
4.6 Event Model . 22
4.6.1 General . 22
4.6.2 EventTypes . 22
4.6.3 Event Categorization . 23
4.7 Methods . 23
4.8 Roles . 24
4.8.1 Overview . 24
4.8.2 Well-known Roles . 24
4.8.3 Evaluating Permissions with Roles . 25
5 Standard NodeClasses . 27
5.1 Overview. 27
5.2 Base NodeClass . 28
5.2.1 General . 28
5.2.2 NodeId. 28
5.2.3 NodeClass . 28
5.2.4 BrowseName . 28
5.2.5 DisplayName . 29
5.2.6 Description . 29
5.2.7 WriteMask . 29
5.2.8 UserWriteMask . 29

IEC 62541-3:2020 © IEC 2020 – 3 –
5.2.9 RolePermissions . 30
5.2.10 UserRolePermissions . 31
5.2.11 AccessRestrictions . 31
5.3 ReferenceType NodeClass . 31
5.3.1 General . 31
5.3.2 Attributes . 32
5.3.3 References . 34
5.4 View NodeClass . 34
5.5 Objects . 36
5.5.1 Object NodeClass . 36
5.5.2 ObjectType NodeClass . 38
5.5.3 Standard ObjectType FolderType . 40
5.5.4 Client-side creation of Objects of an ObjectType . 40
5.6 Variables . 40
5.6.1 General . 40
5.6.2 Variable NodeClass . 41
5.6.3 Properties .
...