SIST EN IEC 62541-7:2026

OPC Unified Architecture - Part 7: Profiles (IEC 62541-7:2025)

IEC 62541-7: 2025 specifies value and structure of Profiles in the OPC Unified Architecture.
OPC UA Profiles are used to segregate features with regard to testing of OPC UA products and the nature of the testing. The scope of this document includes defining functionality that can only be tested. The definition of actual TestCases is not within the scope of this document, but the general categories of TestCases are covered by this document.
Most OPC UA applications will conform to several, but not all of the Profiles.
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) Profiles and ConformanceUnits are not part of this document, but are solely managed in a public database as described in Clause 1.

OPC Unified Architecture - Teil 7: Profile (IEC 62541-7:2025)

Architecture unifiée OPC - Partie 7: Profils (IEC 62541-7:2025)

IEC 62541-7: 2025 spécifie la valeur et la structure des Profils dans l'Architecture unifiée OPC.
Les Profils OPC UA document permettent de classer les caractéristiques en fonction des essais de produits OPC UA et de la nature des essais. Le domaine d'application du présent document inclut la définition d'une fonctionnalité qui peut seulement être soumise à l'essai. La définition des TestCases réels ne relève pas du domaine d'application du présent document, mais les catégories de TestCases générales sont couvertes par le présent document.
La plupart des applications OPC UA sont conformes à plusieurs Profils, mais pas à l'ensemble des Profils.
Cette quatrième édition annule et remplace la troisième édition parue en 2020. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les Profils et les ConformanceUnits ne font pas partie du présent document, mais sont uniquement gérés dans une base de données publique, comme cela est décrit à l'Article 1.

Enotna arhitektura OPC - 7. del: Profili (IEC 62541-7:2025)

IEC 62541-7: 2025 določa vrednost in strukturo profilov v enotni arhitekturi OPC (OPC Unified Architecture).
Profili OPC UA se uporabljajo za ločevanje funkcij glede na testiranje izdelkov OPC UA in naravo testiranja. Obseg tega dokumenta vključuje definiranje funkcionalnosti, ki jih je mogoče le testirati. Definicija dejanskih testnih primerov (TestCases) ni v obsegu tega dokumenta, vendar so splošne kategorije testnih primerov zajete v tem dokumentu.
Večina aplikacij OPC UA bo skladna z več, vendar ne z vsemi profili.
Ta četrta izdaja preklicuje in nadomešča tretjo izdajo, objavljeno leta 2020. Ta izdaja predstavlja tehnično revizijo.
Ta izdaja vključuje naslednje pomembne tehnične spremembe v primerjavi s prejšnjo izdajo:
a) Profili in enote skladnosti (ConformanceUnits) niso del tega dokumenta, temveč so izključno upravljani v javni bazi podatkov, kot je opisano v točki 1.

General Information

• Status: Published
• Public Enquiry End Date: 30-Mar-2024
• Publication Date: 12-Apr-2026
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Feb-2026
• Due Date: 17-Apr-2026
• Completion Date: 13-Apr-2026
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: EN IEC 62541-7:2026 - OPC Unified Architecture - Part 7: Profiles

Relations

• Refers: SIST EN IEC 62541-12:2020 - OPC Unified Architecture Specification - Part 12: Discovery (IEC 62541-12:2020)
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-6:2020 - OPC Unified Architecture - Part 6: Mappings (IEC 62541-6:2020)
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-11:2020 - OPC Unified Architecture - Part 11: Historical Access (IEC 62541-11:2020)
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-8:2020 - OPC Unified Architecture - Part 8: Data Access (IEC 62541-8:2020)
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-3:2020 - OPC unified architecture - Part 3: Address Space Model (IEC 62541-3:2020)
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-5:2020 - OPC Unified Architecture - Part 5: Information Model
• Effective Date: 10-Feb-2026
• Refers: SIST EN IEC 62541-15:2025 - OPC Unified Architecture - Part 15: Safety
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-13:2020 - OPC Unified Architecture - Part 13: Aggregates (IEC 62541-13:2020)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-1:2026 - OPC unified architecture - Part 1: Overview and concepts (IEC 62541-1:2025)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-18:2025 - OPC unified architecture - Part 18: Role-Based Security (IEC 62541-18:2025)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-10:2026 - OPC unified architecture - Part 10: Programs (IEC 62541-10:2025)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-4:2020 - OPC Unified Architecture - Part 4: Services (IEC 62541-4:2020)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-13:2026 - OPC unified architecture - Part 13: Aggregates (IEC 62541-13:2025)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-5:2026 - OPC unified architecture - Part 5: Information model (IEC 62541-5:2026)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 62541-20:2026 - OPC unified architecture - Part 20: File transfer (IEC 62541-20:2025)
• Effective Date: 03-Feb-2026

Overview

FprEN IEC 62541-7:2025 - OPC Unified Architecture (OPC UA) Part 7: Profiles specifies the value and structure of OPC UA Profiles used to group OPC UA features for conformance testing and certification. It defines how functionality is organized into ConformanceUnits, ConformanceGroups, Facets, and ProfileCategories, and clarifies which features require lab-based testing versus automated tool-based testing. The actual Profiles and ConformanceUnits are maintained in a public online database (https://profiles.opcfoundation.org/). This edition (4th) replaces the 2020 edition and constitutes a technical revision.

Key Topics

• Profile model and structure
  • How Profiles are composed from ConformanceUnits and Facets.
  • Use of ProfileCategories (e.g., Server, Client, Application Profiles) to group related Profiles.
• ConformanceUnits and ConformanceGroups
  • ConformanceUnits represent testable feature sets (services, portions of services, information models).
  • ConformanceGroups organize ConformanceUnits for clarity and test planning.
• Testing scope and categories
  • Distinction between automated (tool-based) testing (e.g., OPC UA Compliance Test Tool - CTT) and lab-based testing performed by TestLabs.
  • The standard defines which functionality can only be validated in a lab; TestCases themselves are not included in this document.
• Profile conformance and versioning
  • Rules and conventions for declaring compliance with Profiles and handling Profile versions.
• References to test specifications
  • Links between ConformanceUnits and test specifications (see Compliance Part 8 - UA Server, and Part 9 - UA Client).

Applications

Who uses this standard and why:

• OPC UA product developers (Server/Client) - to understand which Features and Profiles they must implement and certify.
• Test labs and certification bodies - to plan lab-based testing, interpret ConformanceUnits, and report Profile conformance.
• System integrators and QA teams - to select appropriate Profiles that match application needs (HMI, DA, HA, industrial process control).
• Tool vendors - to align automated testing tools (CTT and others) with Profile definitions stored in the public database.

Practical benefits:

• Simplifies certification planning by grouping related functionality.
• Enables consistent, repeatable conformance testing across vendors and labs.
• Helps implementers identify minimal and extended feature sets for specific use cases.

Related standards

• IEC 62541-1: Overview and Concepts
• IEC 62541-2: Security Model
• IEC 62541-3: Address Space Model
• IEC 62541-4: Services
• OPC Foundation Compliance Part 8 (UA Server) and Part 9 (UA Client) - TestCases and TestLab specifications

Keywords: OPC Unified Architecture, OPC UA Profiles, ConformanceUnits, TestCases, OPC UA Certification, Compliance Test Tool, OPC Foundation, Profile database.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Enotna arhitektura OPC - 7. del: Profili (IEC 62541-7:2025)
OPC Unified Architecture - Part 7: Profiles (IEC 62541-7:2025)
OPC Unified Architecture - Teil 7: Profile (IEC 62541-7:2025)
Architecture unifiée OPC - Partie 7: Profils (IEC 62541-7:2025)
Ta slovenski standard je istoveten z: EN IEC 62541-7:2026
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 62541-7

NORME EUROPÉENNE
EUROPÄISCHE NORM February 2026
ICS 25.040.40; 35.100.05 Supersedes EN IEC 62541-7:2020
English Version
OPC Unified Architecture - Part 7: Profiles
(IEC 62541-7:2025)
Architecture unifiée OPC - Partie 7: Profils OPC Unified Architecture - Teil 7: Profile
(IEC 62541-7:2025) (IEC 62541-7:2025)
This European Standard was approved by CENELEC on 2026-01-20. 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,
Türkiye 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62541-7:2026 E

European foreword
The text of document 65E/1184/FDIS, future edition 4 of IEC 62541-7, 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) 2027-02-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-02-28
document have to be withdrawn
This document supersedes EN IEC 62541-7:2020 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 standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62541-7:2025 was approved by CENELEC as a European
Standard without any modification.
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 62541-1 - OPC Unified Architecture - Part 1: EN IEC 62541-1 -
Overview and concepts
IEC 62541-2 - OPC unified architecture - Part 2: Security EN IEC 62541-2 -
model
IEC 62541-3 - OPC Unified Architecture - Part 3: Address EN IEC 62541-3 -
Space Model
IEC 62541-4 - OPC unified architecture - Part 4: Services EN IEC 62541-4 -
IEC 62541-5 - OPC Unified architecture - Part 5: EN IEC 62541-5 -
Information Model
IEC 62541-6 - OPC unified architecture - Part 6: EN IEC 62541-6 -
Mappings
IEC 62541-8 - OPC unified architecture - Part 8: Data EN IEC 62541-8 -
access
IEC 62541-9 - OPC Unified Architecture - Part 9: Alarms EN IEC 62541-9 -
and Conditions
IEC 62541-10 - OPC Unified Architecture - Part 10: EN IEC 62541-10 -
Programs
IEC 62541-11 - OPC Unified Architecture - Part 11: EN IEC 62541-11 -
Historical Access
IEC 62541-12 - OPC unified architecture - Part 12: EN IEC 62541-12 -
Discovery and global services
IEC 62541-13 - OPC Unified Architecture - Part 13: EN IEC 62541-13 -
Aggregates
IEC 62541-14 - OPC unified architecture - Part 14: PubSub EN IEC 62541-14 -
IEC 62541-15 - OPC Unified Architecture - Part 15: Safety EN IEC 62541-15 -

Under preparation. Stage at the time of publication: FprEN IEC 62541-2:2025.
Under preparation. Stage at the time of publication: prEN IEC 62541-9:2024.
Under preparation. Stage at the time of publication: prEN IEC 62541-14:2024.
IEC 62541-16 - OPC unified architecture - Part 16: State EN IEC 62541-16 -
Machines
IEC 62541-17 - OPC unified architecture - Part 17: Alias EN IEC 62541-17 -
Names
IEC 62541-18 - OPC unified architecture - Part 18: Role- EN IEC 62541-18 -
Based Security
IEC 62541-19 - OPC unified architecture - Part 19: EN IEC 62541-19 -
Dictionary Reference
IEC 62541-20 - OPC unified architecture - Part 20: File EN IEC 62541-20 -
transfer
IEC 62541-22 - OPC unified architecture - Part 22: Base EN IEC 62541-22 -
Network Model
IEC 62541-24 - OPC unified architecture - Part 24: EN IEC 62541-24 -
Scheduler
IEEE 802.1AS 2011 IEEE Standard for Local and Metropolitan - -
Area Networks - Timing and
Synchronization for Time-Sensitive
Applications in Bridged Local Area
Networks
IEEE 1588 2019 IEEE Standard for a Precision Clock - -
Synchronization Protocol for Networked
Measurement and Control Systems
RFC 2104 - HMAC: Keyed-Hashing for Message - -
Authentication
RFC 3174 - US Secure Hash Algorithm 1 (SHA1) - -
RFC 3686 - Using Advanced Encryption Standard - -
(AES) Counter Mode with IPsec
Encapsulating Security Payload (ESP)
RFC 3447 - Public-Key Cryptography Standards - -
(PKCS) #1: RSA Cryptography
RFC 4634 - US Secure Hash Algorithms (SHA and - -
HMAC-SHA)
RFC 5869 - HMAC-based Extract-and-Expand Key - -
Derivation Function (HKDF)
RFC 6243 - With-defaults Capability for NETCONF - -
RFC 8439 - ChaCha20 and Poly1305 for IETF - -
Protocols
IEC 62541-7 ®
Edition 4.0 2025-12
INTERNATIONAL
STANDARD
OPC Unified Architecture -
Part 7: Profiles
ICS 25.040.40; 35.100.05 ISBN 978-2-8327-0911-5

IEC 62541-7:2025-12(en)
IEC 62541-7:2025 © IEC 2025
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions. 12
3.2 Abbreviated terms . 13
4 Profile model . 14
4.1 General . 14
4.2 ConformanceUnits and Conformance Groups . 15
4.3 Profiles . 15
4.4 Profile Categories . 15
4.5 Profile conformance . 16
4.6 Conventions for Profile definitions . 16
4.7 Profile versioning . 16
4.8 Applications . 16
5 ConformanceUnits . 17
5.1 Conformance Groups . 17
5.2 ConformanceUnits by ConformanceGroup . 18
5.2.1 Miscellaneous . 18
5.2.2 Address Space Model . 20
5.2.3 Base Information . 22
5.2.4 Base File Information . 29
5.2.5 Base Services . 30
5.2.6 Discovery Services . 31
5.2.7 Session Services . 32
5.2.8 View Services . 33
5.2.9 Attribute Services . 34
5.2.10 Subscription Services . 35
5.2.11 Monitored Item Services . 36
5.2.12 Method Services . 38
5.2.13 Node Management Services . 38
5.2.14 Auditing . 39
5.2.15 Redundancy . 40
5.2.16 Protocol and Encoding . 40
5.2.17 Security General . 41
5.2.18 Security User Token . 46
5.2.19 Security Algorithms . 48
5.2.20 Safety . 54
5.2.21 Data Access . 54
5.2.22 Alarms and Conditions . 56
5.2.23 Historical Access . 59
5.2.24 Aggregates . 62
5.2.25 GDS . 67
5.2.26 AliasName . 68
5.2.27 Scheduler . 68
5.2.28 PubSub General . 69
IEC 62541-7:2025 © IEC 2025
5.2.29 PubSub Configuration . 71
5.2.30 PubSub Discovery . 74
5.2.31 PubSub Security . 74
5.2.32 PubSub SKS . 75
5.2.33 PubSub Limits (Deprecated) . 76
6 Profiles . 79
6.1 Profiles by Category . 79
6.1.1 Application Profiles . 79
6.1.2 Server . 80
6.1.3 Client . 82
6.1.4 Publisher . 85
6.1.5 Subscriber . 85
6.1.6 Transport . 86
6.1.7 Security . 87
6.1.8 Global Directory Service . 88
7 Profile Definitions . 88
7.1 Application Profiles . 88
7.1.1 Nano Embedded Device 2022 Server Profile . 88
7.1.2 Micro Embedded Device 2022 Server Profile . 88
7.1.3 Embedded 2022 UA Server Profile . 89
7.1.4 Standard 2022 UA Server Profile . 89
7.1.5 Minimum UA Client 2022 Profile . 89
7.1.6 Standard UA Client 2022 Profile . 90
7.1.7 Global Discovery Server 2022 Profile . 90
7.1.8 Global Discovery and Certificate Mgmt 2022 Server . 91
7.1.9 Global Certificate Management Client 2022 Profile . 91
7.1.10 Security Key Server Profile . 91
7.1.11 Publisher UDP UADP Periodic Fixed 2022 Profile . 92
7.1.12 Publisher UDP UADP Dynamic 2022 Profile . 92
7.1.13 Publisher UDP UADP Flexible Layout 2022 Profile . 93
7.1.14 Subscriber UDP UADP Periodic Fixed 2022 Profile . 93
7.1.15 Subscriber UDP UADP Dynamic 2022 Profile . 93
7.1.16 Subscriber UDP UADP Flexible Layout 2022 Profile . 94
7.2 Server . 94
7.2.1 Core 2022 Server Facet . 94
7.2.2 Exposes Type System Server Facet . 95
7.2.3 Base Server Behaviour Facet . 97
7.2.4 Method 2022 Server Facet . 97
7.2.5 File Access Server Facet . 97
7.2.6 Temporary File Access Server Facet . 97
7.2.7 Dictionary Reference Server Facet . 98
7.2.8 AliasName Server Facet . 98
7.2.9 AliasName Aggregating Server Facet . 98
7.2.10 State Machine 2022 Server Facet . 98
7.2.11 Scheduler Base Server Facet . 99
7.2.12 Scheduler Configuration Server Facet . 99
7.2.13 Node Management 2022 Server Facet . 99
7.2.14 Attribute WriteMask Server Facet . 99
IEC 62541-7:2025 © IEC 2025
7.2.15 Publisher Information Model 2022 Facet . 100
7.2.16 Subscriber Information Model 2022 Facet . 100
7.2.17 Documentation Server Facet . 101
7.2.18 Subnet Discovery Server Facet. 101
7.2.19 Reverse Connect Server Facet . 101
7.2.20 Sessionless Server Facet . 101
7.2.21 Global Certificate Management Server Facet . 102
7.2.22 Authorization Service Server Facet . 102
7.2.23 KeyCredential Service Server Facet . 102
7.2.24 User Role Base 2022 Server Facet . 102
7.2.25 User Role Management 2022 Server Facet . 102
7.2.26 User Token – Anonymous Server Facet . 103
7.2.27 User Token – User Name Password Server Facet . 103
7.2.28 User Token – X509 Certificate Server Facet . 103
7.2.29 User Token – JWT Server Facet . 103
7.2.30 Embedded DataChange Subscription 2022 Server Facet . 104
7.2.31 Standard DataChange Subscription 2022 Server Facet. 104
7.2.32 Durable Subscription 2022 Server Facet . 104
7.2.33 Data Access Server Facet . 105
7.2.34 ComplexType 2017 Server Facet . 105
7.2.35 Standard Event Subscription 2022 Server Facet . 106
7.2.36 Model Change Event Server Facet . 106
7.2.37 Auditing 2022 Server Facet . 107
7.2.38 Request State Change Server Facet . 107
7.2.39 Address Space Notifier Server Facet . 107
7.2.40 A & C Base Condition 2022 Server Facet . 107
7.2.41 A & C Refresh2 2022 Server Facet . 108
7.2.42 A & C Address Space Instance 2022 Server Facet . 108
7.2.43 A & C Enable 2022 Server Facet . 108
7.2.44 A & C Previous Instances 2022 Server Facet . 108
7.2.45 A & C Acknowledgeable Alarm 2022 Server Facet . 109
7.2.46 A & C Alarm 2022 Server Facet . 109
7.2.47 A & C Exclusive Alarming 2022 Server Facet . 110
7.2.48 A & C Non–Exclusive Alarming 2022 Server Facet . 110
7.2.49 A & C Alarm Auditing Server Facet . 110
7.2.50 A & C AlarmMetrics Server Facet . 111
7.2.51 A & C CertificateExpiration 2022 Server Facet . 111
7.2.52 A & C Dialog 2022 Server Facet . 111
7.2.53 A & E Wrapper 2022 Facet . 112
7.2.54 Historical Raw Data 2022 Server Facet . 112
7.2.55 Historical Data AtTime 2022 Server Facet . 113
7.2.56 Historical Aggregate 2022 Server Facet . 113
7.2.57 Historical Access Modified Data 2022 Server Facet . 114
7.2.58 Historical Annotation 2022 Server Facet . 114
7.2.59 Historical Access Structured Data 2022 Server Facet . 115
7.2.60 Historical Data Update 2022 Server Facet . 115
7.2.61 Historical Data Insert 2022 Server Facet . 115
7.2.62 Historical Data Replace 2022 Server Facet . 116
IEC 62541-7:2025 © IEC 2025
7.2.63 Historical Data Delete 2022 Server Facet . 116
7.2.64 Base Historical Event 2022 Server Facet . 116
7.2.65 Historical Event Update 2022 Server Facet . 116
7.2.66 Historical Event Insert 2022 Server Facet . 116
7.2.67 Historical Event Replace 2022 Server Facet . 117
7.2.68 Historical Event Delete 2022 Server Facet . 117
7.2.69 Aggregate Subscription 2022 Server Facet . 117
7.2.70 Client Redundancy Server Facet . 118
7.2.71 Redundancy Transparent Server Facet . 118
7.2.72 Redundancy Visible Server Facet . 118
7.3 Client . 119
7.3.1 Core 2022 Client Facet . 119
7.3.2 Minimum UA Client Facet . 119
7.3.3 Base Client Behaviour Facet. 120
7.3.4 AddressSpace Lookup Client Facet . 120
7.3.5 Method Client Facet . 120
7.3.6 Diagnostic Client Facet . 121
7.3.7 Entry Level Support 2015 Client Facet . 121
7.3.8 Multi–Server Client Connection Facet . 121
7.3.9 File Access Client Facet . 121
7.3.10 Temporary File Access Client Facet . 121
7.3.11 Request State Change Client Facet . 122
7.3.12 AliasName Client Facet . 122
7.3.13 State Machine Client Facet . 122
7.3.14 Scheduler Configuration Client Facet . 122
7.3.15 Advanced Type Programming Client Facet . 122
7.3.16 Node Management Client Facet . 123
7.3.17 Documentation – Client . 123
7.3.18 Discovery Client Facet . 123
7.3.19 Subnet Discovery Client Facet . 123
7.3.20 Global Discovery Client Facet . 124
7.3.21 Reverse Connect Client Facet . 124
7.3.22 Sessionless Client Facet . 124
7.3.23 User Role Management Client Facet. 124
7.3.24 User Token – Anonymous Client Facet . 124
7.3.25 User Token – User Name Password Client Facet . 125
7.3.26 User Token – X509 Certificate Client Facet . 125
7.3.27 User Token – JWT Client Facet . 125
7.3.28 Global Certificate Management Client Facet . 125
7.3.29 KeyCredential Service Client Facet . 125
7.3.30 Access Token Request Client Facet . 126
7.3.31 Attribute Read Client Facet . 126
7.3.32 Attribute Write Client Facet . 126
7.3.33 DataChange Subscriber 2022 Client Facet . 127
7.3.34 Durable Subscription Client Facet . 127
7.3.35 DataAccess Client Facet . 127
7.3.36 Event Subscriber Client Facet . 128
7.3.37 Base Event Processing Client Facet . 128
IEC 62541-7:2025 © IEC 2025
7.3.38 Auditing Client Facet . 128
7.3.39 Notifier and Source Hierarchy Client Facet . 129
7.3.40 A & C Base Condition Client Facet . 129
7.3.41 A & C Refresh2 Client Facet . 129
7.3.42 A & C Address Space Instance Client Facet . 129
7.3.43 A & C Enable Client Facet . 129
7.3.44 A & C Previous Instances Client Facet. 130
7.3.45 A & C Alarm Client Facet . 130
7.3.46 A & C Exclusive Alarming Client Facet. 130
7.3.47 A & C Non–Exclusive Alarming Client Facet . 131
7.3.48 A & C AlarmMetrics Client Facet . 131
7.3.49 A & C CertificateExpiration Client Facet. 131
7.3.50 A & C Dialog Client Facet . 131
7.3.51 A & E Proxy Facet . 132
7.3.52 Historical Access Client Facet . 133
7.3.53 Historical Data AtTime Client Facet . 133
7.3.54 Historical Aggregate Client Facet. 133
7.3.55 Historical Annotation Client Facet . 134
7.3.56 Historical Access Modified Data Client Facet . 134
7.3.57 Historical Structured Data Access Client Facet . 134
7.3.58 Historical Structured Data AtTime Client Facet . 135
7.3.59 Historical Structured Data Modified Client Facet . 135
7.3.60 Historical Access Client Server Timestamp Facet . 135
7.3.61 Historical Data Update Client Facet . 135
7.3.62 Historical Data Insert Client Facet . 135
7.3.63 Historical Data Replace Client Facet . 135
7.3.64 Historical Data Delete Client Facet . 136
7.3.65 Historical Structured Data Update Client Facet . 136
7.3.66 Historical Structured Data Insert Client Facet . 136
7.3.67 Historical Structured Data Replace Client Facet . 136
7.3.68 Historical Structured Data Delete Client Facet . 136
7.3.69 Historical Events Client Facet . 136
7.3.70 Historical Event Update Client Facet . 137
7.3.71 Historical Event Insert Client Facet . 137
7.3.72 Historical Event Replace Client Facet . 137
7.3.73 Historical Event Delete Client Facet . 137
7.3.74 Aggregate Subscriber Client Facet . 137
7.3.75 Redundant Client Facet . 138
7.3.76 Redundancy Switch Client Facet . 139
7.4 Publisher . 139
7.4.1 Publisher Message Security Facet . 139
7.4.2 Publisher Cyclic Limits Facet (Deprecated) . 139
7.4.3 Publisher Acyclic Limits Facet (Deprecated) . 139
7.4.4 Publisher UADP Periodic Fixed Layout Facet . 140
7.4.5 Publisher UADP Dynamic Data or Events Facet . 140
7.4.6 Publisher UADP Flexible Layout Facet . 140
7.4.7 Publisher Parameter Configuration Facet. 140
7.4.8 Publisher Component Configuration Facet . 141
IEC 62541-7:2025 © IEC 2025
7.5 Subscriber . 141
7.5.1 Subscriber Message Security Facet . 141
7.5.2 Subscriber Cyclic Limits Facet (Deprecated) . 142
7.5.3 Subscriber Acyclic Limits Facet (Deprecated) . 142
7.5.4 Subscriber UADP Periodic Fixed Layout Facet . 142
7.5.5 Subscriber UADP Dynamic Data or Events Facet . 142
7.5.6 Subscriber UADP Flexible Layout Facet . 143
7.5.7 Subscriber Parameter Configuration Facet . 143
7.5.8 Subscriber Component Configuration Facet . 143
7.6 Transport . 144
7.6.1 UA–TCP UA–SC UA–Binary . 144
7.6.2 HTTPS UA–Binary . 144
7.6.3 HTTPS UA–XML . 144
7.6.4 HTTPS UA–JSON . 144
7.6.5 WSS UA–SC UA–Binary . 145
7.6.6 WSS UA–JSON . 145
7.6.7 PubSub UDP UADP . 145
7.6.8 PubSub ETH UADP . 145
7.6.9 PubSub MQTT UADP . 145
7.6.10 PubSub MQTT JSON . 146
7.6.11 PubSub AMQP UADP . 146
7.6.12 PubSub AMQP JSON . 146
7.6.13 SecurityPolicy [B] – Basic256Sha256 . 146
7.6.14 SecurityPolicy – Basic256 (Deprecated) . 147
7.6.15 SafetyAutomationComponent Facet (Deprecated) . 147
7.6.16 SafetyProvider Facet . 148
7.6.17 SafetyProviderServer Facet . 148
7.6.18 SafetyProviderPubSub Facet . 148
7.6.19 SafetyProviderServerMapper Facet . 148
7.6.20 SafetyProviderPubSubMapper Facet . 148
7.6.21 SafetyConsumer Facet . 148
7.6.22 SafetyConsumerClient Facet . 149
7.6.23 SafetyConsumerPubSub Facet . 149
7.6.24 SafetyConsumerPubSubMapper Facet . 149
7.7 Security . 149
7.7.1 SecurityPolicy – None . 149
7.7.2 SecurityPolicy [A] – Aes128–Sha256–RsaOaep . 150
7.7.3 SecurityPolicy – Aes256–Sha256–RsaPss . 150
7.7.4 SecurityPolicy [ECC–A] – ECC–curve25519 . 151
7.7.5 SecurityPolicy [ECC–B] – ECC–nistP256 . 151
7.7.6 SecurityPolicy – ECC–nistP384 . 152
7.7.7 SecurityPolicy – ECC–brainpoolP256r1 . 152
7.7.8 SecurityPolicy – ECC–brainpoolP384r1 . 153
7.7.9 SecurityPolicy – ECC–curve448 . 154
7.7.10 SecurityPolicy – Basic128Rsa15 (Deprecated) . 154
7.7.11 SecurityPolicy [A] – PubSub–Aes128–CTR . 155
7.7.12 SecurityPolicy – PubSub–Aes256–CTR . 155
7.7.13 Security Time Synchronization . 156
IEC 62541-7:2025 © IEC 2025
7.7.14 Security User Access Control Base . 156
7.7.15 Security User Access Control Full . 156
7.7.16 Best Practice – Audit Events . 156
7.7.17 Best Practice – Alarm Handling . 156
7.7.18 Best Practice – Random Numbers . 157
7.7.19 Best Practice – Timeouts . 157
7.7.20 Best Practice – Administrative Access . 157
7.7.21 Best Practice – Strict Message Handling . 157
7.7.22 Best Practice – Audit Events Client . 157
7.7.23 TransportSecurity – TLS 1.2 . 157
7.7.24 TransportSecurity – TLS 1.2 with PFS . 158
7.7.25 TransportSecurity – TLS 1.0 (Deprecated) . 158
7.7.26 TransportSecurity – TLS 1.1 (Deprecated) . 158
7.7.27 MQTT UserName . 159
7.7.28 AMQP SASL Plain . 159
7.8 Global Directory Service . 159
7.8.1 Global Service Authorization Request Server Facet . 159
7.8.2 Global Service KeyCredential Pull Facet . 159
7.8.3 Global Service KeyCredential Push Facet . 159
7.8.4 GDS AliasName Server Facet . 160

Figure 1 – Profile – ConformanceUnit – TestCases . 14

Table 1 – Profile Categories . 15
Table 2 – Conformance Groups . 17
Table 3 – Miscellaneous . 18
Table 4 – Address Space Model . 20
Table 5 – Base Information . 22
Table 6 – Base File Information . 29
Table 7 – Base Services . 30
Table 8 – Discovery Services . 31
Table 9 – Session Services . 32
Table 10 – View Services . 33
Table 11 – Attribute Services . 34
Table 12 – Subscription Services .
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