prEN IEC 62541-12:2024

OPC unified architecture - Part 12: Discovery and global services

OPC Unified Architecture - Teil 12: Erkundung und globale Dienste

Architecture unifiée OPC - Partie 12: Services globaux et de découverte

Enotna arhitektura OPC - 12. del: Odkrivanje in globalne storitve

General Information

• Status: Not Published
• Publication Date: 18-Aug-2025
• ICS: 25.040.40 - Industrial process measurement and control
• 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: 19-Apr-2024
• Completion Date: 19-Apr-2024
• Ref Project: oSIST prEN IEC 62541-12:2024 - OPC unified architecture - Part 12: Discovery and global services

Relations

• Revises: EN IEC 62541-12:2020 - OPC unified architecture - Part 12: Discovery and global services
• Effective Date: 31-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2024
Enotna arhitektura OPC - 12. del: Odkrivanje in globalne storitve
OPC unified architecture - Part 12: Discovery and global services
OPC Unified Architecture - Teil 12: Erkundung und globale Dienste
Architecture unifiée OPC - Partie 12: Services globaux et de découverte
Ta slovenski standard je istoveten z: prEN IEC 62541-12:2024
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/1051/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62541-12 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-01-26 2024-04-19
SUPERSEDES DOCUMENTS:
65E/973/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 12: Discovery and global services

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.

IEC CDV 62541-12 © IEC 2023
1 CONTENTS
2 Page
3 FIGURES . v
4 TABLES . vi
5 FOREWORD . ix
6 1 Scope . 1
7 2 Normative references . 1
8 3 Terms, definitions, and conventions . 2
9 3.1 Terms and definitions. 2
10 3.2 Abbreviations and symbols . 4
11 4 The Discovery Process . 5
12 4.1 Overview . 5
13 4.2 Registration and Announcement of Applications . 5
14 4.2.1 Overview . 5
15 4.2.2 Hosts with a LocalDiscoveryServer . 5
16 4.2.3 Hosts without a LocalDiscoveryServer . 6
17 4.3 The Discovery Process for Clients to Find Servers . 6
18 4.3.1 Overview . 6
19 4.3.2 Simple Discovery with a DiscoveryUrl . 7
20 4.3.3 Local Discovery . 7
21 4.3.4 MulticastSubnet Discovery . 8
22 4.3.5 Global Discovery . 8
23 4.3.6 Combined Discovery Process for Clients . 9
24 4.4 The Discovery Process for Reverse Connections . 10
25 4.4.1 Overview . 10
26 4.4.2 Out-of-band Discovery . 10
27 4.4.3 Global Discovery for Reverse Connections . 10
28 5 Local Discovery Server . 11
29 5.1 Overview . 11
30 5.2 Security Considerations for Multicast DNS . 11
31 5.3 Network Architectures . 11
32 5.3.1 Overview . 11
33 5.3.2 Single MulticastSubnet . 11
34 5.3.3 Multiple MulticastSubnet . 12
35 5.3.4 No MulticastSubnet . 13
36 5.3.5 Domain Names and MulticastSubnets . 13
37 6 Global Discovery Server . 14
38 6.1 Overview . 14
39 6.2 Roles and Privileges . 14
40 6.3 Client connections to global services . 14
41 6.4 Local Discovery . 15
42 6.5 Application Registration Workflow . 16
43 6.6 Information Model . 18
44 6.6.1 Overview . 18
45 6.6.2 Directory . 19
46 6.6.3 DirectoryType . 19
47 6.6.4 FindApplications . 20

IEC CDV 62541-12 © IEC 2023 ii

48 6.6.5 ApplicationRecordDataType . 21
49 6.6.6 RegisterApplication . 21
50 6.6.7 UpdateApplication . 22
51 6.6.8 UnregisterApplication . 23
52 6.6.9 GetApplication . 23
53 6.6.10 QueryApplications . 24
54 6.6.11 QueryServers (deprecated) . 25
55 6.6.12 ApplicationRegistrationChangedAuditEventType. 27
56 7 Certificate Management . 27
57 7.1 Overview . 27
58 7.2 Roles and Privileges . 28
59 7.3 Pull Management . 29
60 7.4 Push Management . 30
61 7.5 Application Setup . 30
62 7.6 Pull Management Workflow . 31
63 7.7 Push Management Workflow . 34
64 7.8 Common Information Model . 36
65 7.8.1 Overview . 36
66 7.8.2 TrustLists . 36
67 7.8.3 CertificateGroups . 44
68 7.8.4 CertificateTypes . 46
69 7.9 Information Model for Pull Certificate Management . 50
70 7.9.1 Overview . 50
71 7.9.2 CertificateDirectoryType . 50
72 7.9.3 StartSigningRequest . 51
73 7.9.4 StartNewKeyPairRequest . 53
74 7.9.5 FinishRequest . 54
75 7.9.6 RevokeCertificate . 55
76 7.9.7 GetCertificateGroups . 56
77 7.9.8 GetCertificates . 56
78 7.9.9 GetTrustList . 57
79 7.9.10 GetCertificateStatus . 58
80 7.9.11 CheckRevocationStatus . 58
81 7.9.12 CertificateRequestedAuditEventType . 59
82 7.9.13 CertificateDeliveredAuditEventType . 60
83 7.10 Information Model for Push Certificate Management . 60
84 7.10.1 Overview . 60
85 7.10.2 ServerConfiguration . 62
86 7.10.3 ServerConfigurationType . 63
87 7.10.4 UpdateCertificate . 64
88 7.10.5 GetCertificates . 65
89 7.10.6 ApplyChanges . 66
90 7.10.7 CreateSigningRequest . 66
91 7.10.8 CancelChanges . 67
92 7.10.9 GetRejectedList . 68
93 7.10.10 ResetToServerDefaults . 68
94 7.10.11 TransactionDiagnosticsType . 69
95 7.10.12 TransactionErrorType . 70
96 7.10.13 CertificateUpdateRequestedAuditEventType . 70

iii IEC CDV 62541-12 © IEC 2023

97 7.10.14 CertificateUpdatedAuditEventType . 70
98 8 KeyCredential Management .
...