EN IEC 62541-9:2020

OPC Unified Architecture - Part 9: Alarms and Conditions

IEC 62541-9:2020 is available as IEC 62541-9:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62541-9:2020 specifies the representation of Alarms and Conditions in the OPC Unified Architecture. Included is the Information Model representation of Alarms and Conditions in the OPC UA address space. Other aspects of alarm systems such as alarm philosophy, life cycle, alarm response times, alarm types and many other details are captured in documents such as IEC 62682 and ISA 18.2. The Alarms and Conditions Information Model in this specification is designed in accordance with IEC 62682 and ISA 18.2. This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) added optional engineering units to the definition of RateOfChange alarms; b) to fulfill the IEC 62682 model, the following elements have been added: - AlarmConditionType States: Suppression, Silence, OutOfService, Latched; - AlarmConditionType Properties: OnDelay, OffDelay, FirstInGroup, ReAlarmTime; - New alarm types: DiscrepencyAlarm, DeviationAlarm, InstrumentDiagnosticAlarm, SystemDiagnosticAlarm. c) added Annex that specifies how the concepts of this OPC UA part maps to IEC 62682 and ISA 18.2; d) added new ConditionClasses: Safety, HighlyManaged, Statistical, Testing, Training; e) added CertificateExpiration AlarmType; f) added Alarm Metrics model.

OPC Unified Architecture – Teil 9: Alarme und Zustände

Architecture unifiée OPC - Partie 9: Alarmes et Conditions

IEC 62541-9:2020 est disponible sous forme de IEC 62541-9:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 62541-9:2020 spécifie la représentation des Alarmes et des Conditions dans l'Architecture unifiée OPC. Il comprend la représentation par le Modèle d'information des Alarmes et des Conditions dans l'espace d'adressage OPC UA. Les autres aspects des systèmes d'alarme tels que la philosophie d'alarme, le cycle de vie, le temps de réponse de l'alarme, les types d'alarmes et de nombreux autres détails figurent dans des documents tels que l'IEC 62682 et l'ISA 18.2. Le Modèle d'information sur les Alarmes et les Conditions de la présente spécification est conçu conformément à l'IEC 62682 et à l'ISA 18.2. Cette troisième édition annule et remplace la deuxième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) des unités techniques facultatives ont été ajoutées à la définition des alarmes RateOfChange; b) afin de respecter le modèle IEC 62682, les éléments suivants ont été ajoutés: - états d'AlarmConditionType: Suppression, Silence, OutOfService, Latched; - Propriétés d'AlarmConditionType: OnDelay, OffDelay, FirstInGroup, ReAlarmTime; - nouveaux types d'alarmes: DiscrepencyAlarm, DeviationAlarm, InstrumentDiagnosticAlarm, SystemDiagnosticAlarm; c) ajout d'une annexe qui spécifie la manière dont les concepts de cette partie d'OPC UA assurent la correspondance avec l'IEC 62682 et l'ISA 18.2; d) nouvelles ConditionClasses ajoutées: Safety, HighlyManaged, Statistical, Testing, Training; e) ajout de l'AlarmType CertificateExpiration; f) ajout d'un modèle de Mesures d'Alarme.

Enotna arhitektura OPC - 9. del: Alarmi in pogoji (IEC 62541-9:2020)

General Information

• Status: Published
• Publication Date: 06-Aug-2020
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100 - Open systems interconnection (OSI)
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: IEC/SC 65E - IEC_SC_65E
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 07-Aug-2020
• Completion Date: 07-Aug-2020
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN IEC 62541-9:2020 - OPC Unified Architecture - Part 9: Alarms and conditions (IEC 62541-9:2020)

Relations

• Replaces: EN 62541-9:2015 - OPC unified architecture - Part 9: Alarms and conditions
• Effective Date: 11-Aug-2020
• Revised: prEN IEC 62541-9:2024 - OPC unified architecture - Part 9: Alarms and conditions
• Effective Date: 31-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2020
Nadomešča:
SIST EN 62541-9:2015
Enotna arhitektura OPC - 9. del: Alarmi in pogoji (IEC 62541-9:2020)
OPC Unified Architecture - Part 9: Alarms and conditions (IEC 62541-9:2020)
OPC Unified Architecture - Teil 9: Alarme und Zustände (IEC 62541-9:2020)
Architecture unifiée OPC - Partie 9: Alarmes et conditions (IEC 62541-9:2020)
Ta slovenski standard je istoveten z: EN IEC 62541-9:2020
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 62541-9

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 35.100.05; 25.040.40 Supersedes EN 62541-9:2015 and all of its amendments
and corrigenda (if any)
English Version
OPC Unified Architecture - Part 9: Alarms and Conditions
(IEC 62541-9:2020)
Architecture unifiée OPC - Partie 9: Alarmes et Conditions OPC Unified Architecture - Teil 9: Alarme und Zustände
(IEC 62541-9:2020) (IEC 62541-9:2020)
This European Standard was approved by CENELEC on 2020-07-23. 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,
Turkey 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62541-9:2020 E

European foreword
The text of document 65E/709/FDIS, future edition 3 of IEC 62541-9, 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) 2021-04-23
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-07-23
document have to be withdrawn
This document supersedes EN 62541-9:2015 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 mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 62541-9:2020 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.cenelec.eu.
Publication Year Title EN/HD Year
IEC/TR 62541-1 - OPC unified architecture - Part 1: Overview CLC/TR 62541-1 -
and concepts
IEC 62541-3 - OPC Unified Architecture - Part 3: Address - -
Space Model
IEC 62541-4 - OPC Unified Architecture - Part 4: Services - -
IEC 62541-5 - OPC Unified Architecture - Part 5: - -
Information Model
IEC 62541-6 - OPC Unified Architecture - Part 6: Mappings - -
IEC 62541-7 - OPC unified architecture - Part 7: Profiles - -
IEC 62541-8 - OPC Unified Architecture - Part 8: Data - -
Access
IEC 62541-11 - OPC Unified Architecture - Part 11: - -
Historical Access
IEC 62682 - Management of alarms systems for the - -
process industries
EEMUA 191 - Alarm systems - A guide to design, - -
management and procurement
IEC 62541-9 ®
Edition 3.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 9: Alarms and Conditions
Architecture unifiée OPC –
Partie 9: Alarmes et Conditions

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-8465-0

– 2 – IEC 62541-9:2020 © IEC 2020
CONTENTS
FOREWORD . 10
1 Scope . 12
2 Normative references . 12
3 Terms, definitions, abbreviated terms and data types used . 12
3.1 Terms and definitions . 12
3.2 Abbreviated terms . 15
3.3 Data types used . 15
4 Concepts . 15
4.1 General . 15
4.2 Conditions . 15
4.3 Acknowledgeable Conditions . 17
4.4 Previous states of Conditions . 18
4.5 Condition state synchronization . 19
4.6 Severity, quality, and comment . 19
4.7 Dialogs . 20
4.8 Alarms . 20
4.9 Multiple active states . 22
4.10 Condition instances in the AddressSpace . 23
4.11 Alarm and Condition auditing . 24
5 Model . 24
5.1 General . 24
5.2 Two-state state machines . 25
5.3 ConditionVariable . 27
5.4 ReferenceTypes . 27
5.4.1 General . 27
5.4.2 HasTrueSubState ReferenceType . 27
5.4.3 HasFalseSubState ReferenceType . 28
5.4.4 HasAlarmSuppressionGroup ReferenceType . 28
5.4.5 AlarmGroupMember ReferenceType . 29
5.5 Condition Model . 29
5.5.1 General . 29
5.5.2 ConditionType . 30
5.5.3 Condition and branch instances . 34
5.5.4 Disable Method . 34
5.5.5 Enable Method . 35
5.5.6 AddComment Method . 35
5.5.7 ConditionRefresh Method . 36
5.5.8 ConditionRefresh2 Method . 38
5.6 Dialog Model . 40
5.6.1 General . 40
5.6.2 DialogConditionType . 40
5.6.3 Respond Method . 42
5.7 Acknowledgeable Condition Model . 42
5.7.1 General . 42
5.7.2 AcknowledgeableConditionType . 43
5.7.3 Acknowledge Method . 44

IEC 62541-9:2020 © IEC 2020 – 3 –
5.7.4 Confirm Method . 45
5.8 Alarm model. 46
5.8.1 General . 46
5.8.2 AlarmConditionType . 47
5.8.3 AlarmGroupType . 52
5.8.4 Reset Method . 52
5.8.5 Silence Method . 53
5.8.6 Suppress Method . 54
5.8.7 Unsuppress Method . 55
5.8.8 RemoveFromService Method . 56
5.8.9 PlaceInService Method . 56
5.8.10 ShelvedStateMachineType . 57
5.8.11 LimitAlarmType . 62
5.8.12 Exclusive limit types . 64
5.8.13 NonExclusiveLimitAlarmType . 67
5.8.14 Level Alarm . 68
5.8.15 Deviation Alarm . 69
5.8.16 Rate of change Alarms . 70
5.8.17 Discrete Alarms . 71
5.8.18 DiscrepancyAlarmType .
...