prEN IEC 62541-3:2024

OPC unified architecture - Part 3: Address space model

OPC Unified Architecture - Teil 3: Adressraummodell

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

Enotna arhitektura OPC - 3. del: Model naslovnega prostora

General Information

• Status: Not Published
• Publication Date: 01-Sep-2025
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 26-Apr-2024
• Completion Date: 26-Apr-2024
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: oSIST prEN IEC 62541-3:2024 - OPC unified architecture - Part 3: Address space model

Relations

• Revises: EN IEC 62541-3:2020 - OPC Unified Architecture - Part 3: Address Space Model
• Effective Date: 31-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2024
Enotna arhitektura OPC - 3. del: Model naslovnega prostora
OPC unified architecture - Part 3: Address space model
OPC Unified Architecture - Teil 3: Adressraummodell
Architecture unifiée OPC - Partie 3: Modèle d'espace d'adressage
Ta slovenski standard je istoveten z: prEN IEC 62541-3:2024
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.

65E/1061/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62541-3 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-02-02 2024-04-26
SUPERSEDES DOCUMENTS:
65E/975/RR
IEC SC 65E : DEVICES AND INTEGRATION IN ENTERPRISE SYSTEMS
SECRETARIAT: SECRETARY:
United States of America Mr Donald (Bob) Lattimer
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
OPC Unified Architecture - Part 3: Address Space Model

PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

65E/1061/CDV
1 CONTENTS
3 FIGURES . vii
4 TABLES . ix
5 FOREWORD . xi
6 1 Scope . 1
7 2 Normative references . 1
8 3 Terms, definitions, abbreviations and conventions . 2
9 3.1 Terms and definitions . 2
10 3.2 Abbreviated terms . 3
11 3.3 Conventions . 3
12 3.3.1 Conventions for AddressSpace figures . 3
13 3.3.2 Conventions for defining NodeClasses . 4
14 4 AddressSpace concepts . 5
15 4.1 Overview . 5
16 4.2 URIs . 5
17 4.3 Object Model . 6
18 4.4 Node Model . 7
19 4.4.1 General . 7
20 4.4.2 NodeClasses . 7
21 4.4.3 Attributes . 7
22 4.4.4 References . 7
23 4.5 Variables . 8
24 4.5.1 General . 8
25 4.5.2 Properties . 8
26 4.5.3 DataVariables . 8
27 4.6 TypeDefinitionNodes . 9
28 4.6.1 General . 9
29 4.6.2 Complex TypeDefinitionNodes and their InstanceDeclarations . 9
30 4.6.3 Subtyping . 10
31 4.6.4 Instantiation of complex TypeDefinitionNodes . 10
32 4.7 Event Model . 11
33 4.7.1 General . 11
34 4.7.2 EventTypes . 12
35 4.7.3 Event Categorization . 12
36 4.8 Methods . 13
37 4.9 Roles . 13
38 4.9.1 Overview . 13
39 4.9.2 Well Known Roles . 14
40 4.9.3 Evaluating Permissions with Roles . 14
41 4.10 Interfaces and AddIns for Objects . 16
42 4.10.1 Overview . 16
43 4.10.2 Interface Model . 17
44 4.10.3 AddIn model . 20
45 5 Standard NodeClasses . 22
46 5.1 Overview . 22
47 5.2 Base NodeClass . 22

IEC CDV 62541-3 © IEC 2023 ii
48 5.2.1 General . 22
49 5.2.2 NodeId . 22
50 5.2.3 NodeClass . 22
51 5.2.4 BrowseName . 22
52 5.2.5 DisplayName . 23
53 5.2.6 Description . 23
54 5.2.7 WriteMask . 23
55 5.2.8 UserWriteMask . 23
56 5.2.9 RolePermissions . 24
57 5.2.10 UserRolePermissions . 25
58 5.2.11 AccessRestrictions . 25
59 5.3 ReferenceType NodeClass . 25
60 5.3.1 General . 25
61 5.3.2 Attributes . 26
62 5.3.3 References . 27
63 5.4 View NodeClass . 28
64 5.5 Objects. 30
65 5.5.1 Object NodeClass . 30
66 5.5.2 ObjectType NodeClass . 31
67 5.5.3 Standard ObjectType FolderType . 32
68 5.5.4 Client-side creation of Objects of an ObjectType . 32
69 5.6 Variables . 33
70 5.6.1 General . 33
71 5.6.2 Variable NodeClass . 33
72 5.6.3 Properties . 36
73 5.6.4 DataVariable . 37
74 5.6.5 VariableType NodeClass . 38
75 5.6.6 Client-side creation of Variables of an VariableType . 40
76 5.7 Methods . 40
77 5.7.1 Method NodeClass . 40
78 5.7.2 HasArgumentDescription ReferenceType . 43
79 5.7.3 HasOptionalInputArgumentDescription ReferenceType . 43
80 5.8 DataTypes . 44
81 5.8.1 DataType Model . 44
82 5.8.2 Encoding Rules for different kinds of DataTypes . 45
83 5.8.3 DataType NodeClass . 45
84 5.8.4 DataTypeEncoding and Encoding Information . 48
85 5.9 Summary of Attributes of the NodeClasses . 49
86 6 Type Model for ObjectTypes and VariableTypes . 49
87 6.1 Overview . 49
88 6.2 Definitions . 49
89 6.2.1 InstanceDeclaration . 49
90 6.2.2 Instances without ModellingRules . 50
91 6.2.3 InstanceDeclarationHierarchy . 50
92 6.2.4 Similar Node of InstanceDeclaration . 50
93 6.2.5 BrowsePath . 50
94 6.2.6 BrowseName within a TypeDefinitionNode . 50
95 6.2.7 Attribute Handling of InstanceDeclarations . 50
96 6.2.8 Attribute Handling of Variable and VariableTypes . 50

iii IEC CDV 62541-3 © IEC 2023

97 6.2.9 NodeIds of InstanceDeclarations . 51
98 6.3 Subtyping of ObjectTypes and VariableTypes . 51
99 6.3
...