EN 62541-6:2015

OPC unified architecture - Part 6: Mappings

IEC 62541-6:2015 specifies the OPC Unified Architecture (OPC UA) mapping between the security model described in IEC TR 62541-2, the abstract service definitions, described in IEC 62541-4, the data structures defined in IEC 62541-5 and the physical network protocols that can be used to implement the OPC UA specification. This second edition cancels and replaces the first edition published in 2011 and constitutes a technical revision. This edition includes the following changes: - A new HTTPS transport has been defined; - Added an additional padding byte to handle asymmetric key sizes larger than 2048 bits. Fixed errors in SOAP action URIs; - Needed a standard way to serialize nodes in an address space. Added the UANodeSet schema defined in Annex F.

OPC Unified Architecture - Teil 6: Protokollabbildungen

Architecture unifiée OPC - Partie 6: Correspondances

L'IEC 62541-6:2015 spécifie les correspondances de l'architecture unifiée OPC (OPC UA) entre le modèle de sécurité décrit dans l'IEC TR 62541-2, les définitions de services abstraits décrites dans l'IEC 62541-4, les structures de données définies dans l'IEC 62541-5 et les protocoles de réseaux physiques qui peuvent être utilisés pour mettre en oeuvre la spécification OPC UA. Cette deuxième édition annule et remplace la première édition parue en 2011. Elle constitue une révision technique. Elle inclut les modifications suivantes: - Un nouveau protocole de transport HTTPS; - Ajout d'un octet de remplissage supplémentaire pour gérer les tailles des clés asymétriques de longueur supérieure à 2048 bits. Définition des erreurs fixes dans les URI d'action SOAP; - Ajout du schéma de l'Ensemble de Noeuds UA (UANodeSet) défini à l'Annexe F.

Enotna arhitektura OPC - 6. del: Načrtovanje (IEC 62541-6:2015)

Ta del standarda IEC 62541 določa načrtovanje enotne arhitekture OPC (OPC UA) med zaščitnim modelom iz standarda IEC TR 62541-2, definicijami abstraktnih storitev iz standarda IEC 62541-4, podatkovnimi strukturami iz standarda IEC 62541-5 in fizičnimi omrežnimi protokoli, ki jih je mogoče uporabiti za izvajanje specifikacije enotne arhitekture OPC.

General Information

• Status: Withdrawn
• Publication Date: 28-May-2015
• Withdrawal Date: 28-Apr-2018
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100 - Open systems interconnection (OSI)
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65E - IEC_SC_65E
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 17-Aug-2023
• Completion Date: 17-Aug-2023
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 62541-6:2015 - OPC Unified Architecture - Part 6: Mappings (IEC 62541-6:2015)

Relations

• Replaces: EN 62541-6:2011 - OPC unified architecture - Part 6: Mappings
• Effective Date: 28-Jan-2023
• Replaced By: EN IEC 62541-6:2020 - OPC Unified Architecture - Part 6: Mappings
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2015
1DGRPHãþD
SIST EN 62541-6:2012
(QRWQDDUKLWHNWXUD23&GHO1DþUWRYDQMH,(&
OPC Unified Architecture - Part 6: Mappings (IEC 62541-6:2015)
OPC unified architecture - Part 6: Mappings (IEC 62541-6:2015)
Architecture unifiée OPC - Partie 6: Correspondances (IEC 62541-6:2015)
Ta slovenski standard je istoveten z: EN 62541-6:2015
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 62541-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2015
ICS 25.040.40; 35.100 Supersedes EN 62541-6:2011
English Version
OPC unified architecture - Part 6: Mappings
(IEC 62541-6:2015)
Architecture unifiée OPC - Partie 6: Correspondances OPC Unified Architecture - Teil 6: Protokollabbildungen
(IEC 62541-6:2015) (IEC 62541-6:2015)
This European Standard was approved by CENELEC on 2015-04-29. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62541-6:2015 E
Foreword
The text of document 65E/377/CDV, future edition 2 of IEC 62541-6, 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 (dop) 2016-01-29
national level by publication of an identical national
standard or by endorsement
(dow) 2018-04-29
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 62541-6:2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] 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, and supports essential requirements of EU Directive(s).
Endorsement notice
The text of the International Standard IEC 62541-6:2015 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 62541-6:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 - CLC/TR 62541-1 -
Part 1: Overview and concepts
IEC/TR 62541-2 -  OPC unified architecture - CLC/TR 62541-2 -
Part 2: Security model
IEC 62541-3 -  OPC unified architecture - EN 62541-3 -
Part 3: Address Space Model
IEC 62541-4 -  OPC Unified Architecture - EN 62541-4 -
Part 4: Services
IEC 62541-5 -  OPC unified architecture - EN 62541-5 -
Part 5: Information Model
IEC 62541-7 -  OPC unified architecture - EN 62541-7 -
Part 7: Profiles
IEEE 754 2008 IEEE Standard for Binary Floating-Point - -
Arithmetic
ITU-T X.509 -  Information technology - Open systems - -
interconnection - The Directory: Public-key
and attribute certificate frameworks
ITU-T X.690 2002 Information technology - ASN.1 encoding - -
rules: Specification of Basic Encoding
Rules (BER), Canonical Encoding Rules
(CER) and Distinguished Encoding Rules
(DER)
FIPS PUB 180-2 2002 Secure Hash Standard - -
FIPS PUB 197 2001 Advanced Encryption Standard (AES) - -
RFC 1305 1992 Network Time Protocol (Version 3) - - -
Specification, Implementation and Analysis
RFC 2104 1997 HMAC: Keyed-Hashing for Message - -
Authentication
RFC 2437 1998 PKCS #1: RSA Cryptography - -
Specifications Version 2.0
Publication Year Title EN/HD Year
RFC 2616 1999 Hypertext Transfer Protocol - HTTP/1.1 - -
RFC 3280 2002 Internet X.509 Public Key Infrastructure - -
Certificate and Certificate Revocation List
(CRL) Profile
RFC 3548 2003 The Base16, Base32, and Base64 Data - -
Encodings
RFC 3629 2003 UTF-8, a transformation format of - -
ISO 10646
RFC 4514 2006 Lightweight Directory Access Protocol - -
(LDAP): String Representation of
Distinguished Names
RFC 5246 2008 The Transport Layer Security (TLS) - -
Protocol Version 1.2
SOAP Part 1 2007 SOAP Version 1.2 - - -
Part 1: Messaging Framework
SOAP Part 2 2007 SOAP Version 1.2 - - -
Part 2: Adjuncts
WS-Addressing 2004 Web Services Addressing - -
(WS-Addressing)
XML Encryption 2002 XML Encryption Syntax and Processing - -
XML Schema Part 1 2004 XML Schema - - -
Part 1: Structures
XML Schema Part 2 2004 XML Schema - - -
Part 2: Datatypes
XML Signature 2008 XML Signature Syntax and Processing - -

IEC 62541-6 ®
Edition 2.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 6: Mappings
Architecture unifiée OPC –
Partie 6: Correspondances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100 ISBN 978-2-8322-2373-4

– 2 – IEC 62541-6:2015 © IEC 2015
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, abbreviations and symbols . 11
3.1 Terms and definitions . 11
3.2 Abbreviations and symbols . 11
4 Overview . 12
5 Data encoding . 13
5.1 General . 13
5.1.1 Overview . 13
5.1.2 Built-in Types . 13
5.1.3 Guid . 14
5.1.4 ByteString . 15
5.1.5 ExtensionObject` . 15
5.1.6 Variant . 15
5.2 OPC UA Binary . 16
5.2.1 General. 16
5.2.2 Built-in Types . 16
5.2.3 Enumerations. 25
5.2.4 Arrays . 25
5.2.5 Structures . 25
5.2.6 Messages . 26
5.3 XML . 26
5.3.1 Built-in Types . 26
5.3.2 Enumerations. 33
5.3.3 Arrays . 33
5.3.4 Structures . 33
5.3.5 Messages . 34
6 Message SecurityProtocols . 34
6.1 Security handshake . 34
6.2 Certificates . 35
6.2.1 General. 35
6.2.2 Application Instance Certificate . 36
6.2.3 Signed Software Certificate. 36
6.3 Time synchronization . 37
6.4 UTC and International Atomic Time (TAI) . 37
6.5 Issued User Identity Tokens – Kerberos . 38
6.6 WS Secure Conversation . 38
6.6.1 Overview . 38
6.6.2 Notation . 40
6.6.3 Request Security Token (RST/SCT) . 40
6.6.4 Request Security Token Response (RSTR/SCT) . 41
6.6.5 Using the SCT . 42
6.6.6 Cancelling Security contexts . 42
6.7 OPC UA Secure Conversation . 43
6.7.1 Overview . 43

IEC 62541-6:2015 © IEC 2015 – 3 –
6.7.2 MessageChunk structure . 43
6.7.3 MessageChunks and error handling . 46
6.7.4 Establishing a SecureChannel . 47
6.7.5 Deriving keys . 48
6.7.6 Verifying Message Security . 49
7 Transport Protocols . 50
7.1 OPC UA TCP . 50
7.1.1 Overview . 50
7.1.2 Message struc
...