EN IEC 62541-15:2025
(Main)OPC Unified Architecture - Part 15: Safety
OPC Unified Architecture - Part 15: Safety
IEC 62541-15:2025 describes a safety communication layer (services and a protocol) for the exchange of SafetyData using IEC 62541 mechanisms. It identifies the principles for functional safety communications defined in IEC 61784‑3 that are relevant for this safety communication layer. This safety communication layer is intended for implementation in safety devices only. NOTE 1 This document targets controller-to-controller communication. However, easy expandability to other use-cases (e.g. OPC UA field level communication) has already been considered in the design of this document. NOTE 2 This document does not cover electrical safety and intrinsic safety aspects. Electrical safety relates to hazards such as electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres. This document defines mechanisms for the transmission of safety-relevant messages among participants within a network using OPC UA technology in accordance with the requirements of the IEC 61508 series and IEC 61784-3 for functional safety. These mechanisms can be used in various industrial applications such as process control, manufacturing, automation, and machinery. This document provides guidelines for both developers and assessors of compliant devices and systems. NOTE 3 The resulting SIL claim of a system depends on the implementation of this document within the system – implementation of this document in a standard device is not sufficient to qualify it as a safety device.
OPC Unified Architecture - Teil 15: Sicherheit
Architecture unifiée OPC - Partie 15: Sécurité
IEC 62541-15:2025 décrit une couche de communication de sécurité (services et protocole) pour l'échange de SafetyData à l'aide des mécanismes de l'IEC 62541. Il identifie les principes qui s'appliquent aux communications de sécurité fonctionnelle définies dans l'IEC 61784‑3, associés à cette couche de communication de sécurité. Cette couche de communication de sécurité est destinée à être mise en œuvre sur les appareils de sécurité uniquement. NOTE 1 Le présent document cible la communication de contrôleur à contrôleur. Cependant, la facilité d'extension à d'autres cas d'utilisation (par exemple, communication au niveau du terrain OPC UA) a déjà été prise en compte dans la conception du présent document. NOTE 2 Le présent document ne traite pas des aspects relatifs à la sécurité électrique et à la sécurité intrinsèque. La sécurité électrique concerne les dangers comme les chocs électriques. La sécurité intrinsèque concerne les dangers associés aux atmosphères explosibles. Le présent document définit les mécanismes de transmission des messages relatifs à la sécurité entre les participants d'un réseau, en utilisant la technologie OPC UA conformément aux exigences de la série IEC 61508 et de l'IEC 61784-3 concernant la sécurité fonctionnelle. Ces mécanismes peuvent être utilisés dans différentes applications industrielles, par exemple la commande de processus, la fabrication, l'automatisation et les machines. Le présent document fournit des lignes directrices aux développeurs, ainsi qu'aux évaluateurs d'appareils et de systèmes conformes. NOTE 3 Le SIL ainsi revendiqué pour un système dépend de la mise en œuvre du présent document au sein du système (la mise en œuvre du présent document dans un appareil normal ne suffit pas à le qualifier d'appareil de sécurité).
Enotna arhitektura OPC - 15. del: Varnost
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62541-15:2024
01-junij-2024
Enotna arhitektura OPC - 15. del: Varnost
OPC Unified Architecture - Part 15: Safety
Architecture unifiée OPC - Partie 15: Sécurité fonctionnelle
Ta slovenski standard je istoveten z: prEN IEC 62541-15:2024
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
oSIST prEN IEC 62541-15:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 62541-15:2024
oSIST prEN IEC 62541-15:2024
65C/1292/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62541-15 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-03-22 2024-06-14
SUPERSEDES DOCUMENTS:
65C/1269/CD, 65C/1285A/CC
IEC SC 65C : INDUSTRIAL NETWORKS
SECRETARIAT: SECRETARY:
France Ms Valérie DEMASSIEUX
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 65E
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 15: Safety
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
NC comments on this CDV will be addressed during the SC65C/WG12 virtual meeting on July 1st-4th, 2024
(four Zoom sessions from 13:00 to 16:00 Geneva time, 11:00 to 14:00 UTC). Meeting details will be sent at a
later date by the convenor.
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.
oSIST prEN IEC 62541-15:2024
– 2 – IEC CDV 62541-15 © IEC 2024
1 CONTENTS
3 FOREWORD .6
4 INTRODUCTION .8
5 1 Scope .9
6 2 Normative references .9
7 3 Terms, definitions and conventions . 10
8 3.1 Terms and definitions . 10
9 3.1.1 Terms and definitions from IEC 61784-3 . 10
10 3.1.2 Additional terms and definitions . 12
11 3.2 Symbols and abbreviated terms . 14
12 3.2.1 Abbreviated terms from IEC 61784-3 . 14
13 3.2.2 Additional symbols and abbreviated terms . 14
14 3.3 Conventions . 14
15 3.3.1 General Conventions . 14
16 3.3.2 Conventions for Requirements Numbering . 15
17 3.3.3 Conventions in state machines . 15
18 4 Overview of OPC UA Safety . 16
19 4.1 General . 16
20 4.2 Implementation aspects . 16
21 4.3 Features . 16
22 4.4 Security policy . 17
23 5 General . 17
24 5.1 External documents providing specifications for the profile . 17
25 5.2 Safety functional requirements . 17
26 5.3 Safety measures . 17
27 5.4 Safety communication layer structure . 18
28 5.5 Requirements for CRC calculation . 20
29 6 Safety communication layer services . 20
30 6.1 General . 20
31 6.2 Information Models . 20
32 6.2.1 General . 20
33 6.2.2 Object and ObjectType Definitions . 21
34 6.2.3 Datatype Definition . 30
35 6.2.4 SafetyProvider Version . 33
36 6.2.5 DataTypes and length of SafetyData . 33
37 6.2.6 Connection establishment . 33
38 6.3 Service interfaces . 33
39 6.3.1 Overview . 33
40 6.3.2 OPC UA Platform interface (OPC UA PI) . 34
41 6.3.3 SafetyProvider interfaces . 34
42 6.3.4 SafetyConsumer interfaces . 40
43 6.3.5 Cyclic and acyclic safety communication . 45
44 6.3.6 Principle for “Application variables with qualifier” . 45
45 6.4 Diagnostics . 45
46 6.4.1 General . 45
47 6.4.2 Diagnostics messages of the SafetyConsumer . 46
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IEC CDV 62541-15 © IEC 2024 – 3 –
48 6.4.3 Method ReadSafetyDiagnostics of the SafetyProvider . 48
49 7 Safety communication layer protocol . 49
50 7.1 General . 49
51 7.2 SafetyProvider and SafetyConsumer . 49
52 7.2.1 SPDU formats . 49
53 7.2.2 Behavior . 50
54 7.2.3 Subroutines . 65
55 8 Safety communication layer management . 71
56 8.1 General . 71
57 8.2 Safety function response time part of communication . 71
58 9 System requirements (SafetyProvider & SafetyConsumer) . 73
59 9.1 Constraints on the SPDU-Parameters. 73
60 9.1.1 SafetyBaseID and SafetyProviderID . 73
61 9.1.2 SafetyConsumerID . 75
62 9.2 Initialization of the MNR in the SafetyConsumer . 75
63 9.3 Constraints on the calculation of system characteristics . 75
64 9.3.1 Probabilistic considerations (informative) . 75
65 9.3.2 Safety related assumptions (informative) . 77
66 9.4 PFH/PFD-values of a logical safety communication link . 77
67 9.5 Safety manual . 78
68 9.6 Indicators and displays . 79
69 10 Assessment . 79
70 10.1 Safety policy . 79
71 10.2 Obligations . 80
72 10.3 Index of Requirements (informative) . 80
73 11 Profiles and Conformance Units . 82
74 11.1 General . 82
75 12 Namespaces . 83
76 12.1 Namespace Metadata . 83
77 12.2 Handling of IEC 62541 Namespaces . 84
78 Annex A (normative) Safety Namespace and mappings . 85
79 Annex B (informative) Additional information . 86
80 B.1 CRC-calculation using tables, for the polynomial 0xF4ACFB13 . 86
81 B.2 Use cases . 88
82 B.2.1 Unidirectional communication . 88
83 B.2.2 Bidirectional communication. 88
84 B.2.3 Safety Multicast . 88
85 B.3 Use cases for Operator Acknowledgment . 89
86 B.3.1 Explanation . 89
87 B.3.2 Use case 1: unidirectional comm. and OA on the SafetyConsumer side . 89
88 B.3.3 Use case 2: bidirectional comm. and dual OA . 90
89 B.3.4 Use case 3: bidirectional comm. and single, one-sided OA. 90
90 B.3.5 Use case 4: bidirectional comm. and single, two-sided OA . 91
91 Annex C (informative) Information for assessment . 92
92 Bibliography . 93
94 Figure 1 (informative) – Relationships of OPC UA Safety with other standards .8
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95 Figure 2 – Safety layer architecture . 19
96 Figure 3 – Server Objects for OPC UA Safety . 22
97 Figure 4 – Instances of server objects for this document . 23
98 Figure 5 – Safety Multicast with three recipients using IEC 62541 PubSub . 27
99 Figure 6 – Safety Parameters for the SafetyProvider and the SafetyConsumer . 28
100 Figure 7 – Safety communication layer overview . 34
101 Figure 8 – SafetyProvider interfaces . 35
102 Figure 9 –
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