EN IEC 62541-9:2020

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 . 75
5.9 ConditionClasses . 75
5.9.1 Overview . 75
5.9.2 BaseConditionClassType . 76
5.9.3 ProcessConditionClassType . 76
5.9.4 MaintenanceConditionClassType . 77
5.9.5 SystemConditionClassType . 77
5.9.6 SafetyConditionClassType . 77
5.9.7 HighlyManagedAlarmConditionClassType . 78
5.9.8 TrainingConditionClassType . 78
5.9.9 StatisticalConditionClassType. 78
5.9.10 TestingConditionSubClassType . 79
5.10 Audit Events . 79
5.10.1 Overview . 79
5.10.2 AuditConditionEventType. 80
5.10.3 AuditConditionEnableEventType . 80
5.10.4 AuditConditionCommentEventType . 80
5.10.5 AuditConditionRespondEventType . 81
5.10.6 AuditConditionAcknowledgeEventType . 81
5.10.7 AuditConditionConfirmEventType . 82
5.10.8 AuditConditionShelvingEventType . 82
5.10.9 AuditConditionSuppressionEventType . 82
5.10.10 AuditConditionSilenceEventType . 83
5.10.11 AuditConditionResetEventType . 83
5.10.12 AuditConditionOutOfServiceEventType . 83
5.11 Condition Refresh related Events . 84
5.11.1 Overview . 84
5.11.2 RefreshStartEventType . 84
5.11.3 RefreshEndEventType . 84
5.11.4 RefreshRequiredEventType . 85

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5.12 HasCondition Reference type . 85
5.13 Alarm and Condition status codes . 86
5.14 Expected A&C server behaviours . 86
5.14.1 General . 86
5.14.2 Communication problems . 86
5.14.3 Redundant A&C servers . 87
6 AddressSpace organisation . 87
6.1 General . 87
6.2 EventNotifier and source hierarchy . 87
6.3 Adding Conditions to the hierarchy. 88
6.4 Conditions in InstanceDeclarations . 89
6.5 Conditions in a VariableType . 90
7 System State and alarms . 90
7.1 Overview. 90
7.2 HasEffectDisable . 90
7.3 HasEffectEnable . 91
7.4 HasEffectSuppress . 91
7.5 HasEffectUnsuppressed . 92
8 Alarm metrics . 93
8.1 Overview. 93
8.2 AlarmMetricsType . 93
8.3 AlarmRateVariableType . 94
8.4 Reset Method . 94
Annex A (informative) Recommended localized names . 96
A.1 Recommended state names for TwoState variables . 96
A.1.1 LocaleId "en" . 96
A.1.2 LocaleId "de" . 96
A.1.3 LocaleId "fr" . 97
A.2 Recommended dialog response options . 98
Annex B (informative) Examples . 99
B.1 Examples for Event sequences from Condition instances . 99
B.1.1 Overview . 99
B.1.2 Server maintains current state only . 99
B.1.3 Server maintains previous states . 100
B.2 AddressSpace examples . 101
Annex C (informative) Mapping to EEMUA . 104
Annex D (informative) Mapping from OPC A&E to OPC UA A&C . 105
D.1 Overview. 105
D.2 Alarms and Events COM UA wrapper . 105
D.2.1 Event Areas . 105
D.2.2 Event sources . 106
D.2.3 Event categories . 106
D.2.4 Event attributes . 107
D.2.5 Event subscriptions . 107
D.2.6 Condition instances . 109
D.2.7 Condition Refresh . 110
D.3 Alarms and Events COM UA proxy . 110
D.3.1 General . 110

IEC 62541-9:2020 © IEC 2020 – 5 –
D.3.2 Server status mapping . 110
D.3.3 Event Type mapping . 110
D.3.4 Event category mapping . 111
D.3.5 Event Category attribute mapping . 112
D.3.6 Event Condition mapping . 115
D.3.7 Browse mapping . 115
D.3.8 Qualified names . 116
D.3.9 Subscription filters . 117
Annex E (informative) IEC 62682 Mapping . 119
E.1 Overview. 119
E.2 Terms . 119
E.3 Alarm records and State indications . 125
Annex F (informative) System State . 126
F.1 Overview. 126
F.2 SystemStateStateMachineType . 127
Bibliography . 131

Figure 1 – Base Condition state model . 16
Figure 2 – AcknowledgeableConditions state model . 17
Figure 3 – Acknowledge state model . 18
Figure 4 – Confirmed Acknowledge state model . 18
Figure 5 – Alarm state machine model . 21
Figure 6 – Typical Alarm Timeline example . 22
Figure 7 – Multiple active states example . 23
Figure 8 – ConditionType hierarchy . 25
Figure 9 – Condition model . 30
Figure 10 – DialogConditionType overview . 40
Figure 11 – AcknowledgeableConditionType overview . 43
Figure 12 – AlarmConditionType Hierarchy Model . 47
Figure 13 – Alarm Model . 48
Figure 14 – Shelve state transitions . 58
Figure 15 – ShelvedStateMachineType model . 58
Figure 16 – LimitAlarmType . 63
Figure 17 – ExclusiveLimitStateMachineType . 64
Figure 18 – ExclusiveLimitAlarmType . 66
Figure 19 – NonExclusiveLimitAlarmType . 67
Figure 20 – DiscreteAlarmType Hierarchy . 72
Figure 21 – ConditionClass type hierarchy . 76
Figure 22 – AuditEvent hierarchy . 79
Figure 23 – Refresh Related Event Hierarchy . 84
Figure 24 – Typical HasNotifier Hierarchy . 88
Figure 25 – Use of HasCondition in a HasNotifier hierarchy . 89
Figure 26 – Use of HasCondition in an InstanceDeclaration . 89
Figure 27 – Use of HasCondition in a VariableType . 90
Figure B.1 – Single state example. 99

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Figure B.2 – Previous state example . 100
Figure B.3 – HasCondition used with Condition instances . 102
Figure B.4 – HasCondition reference to a Condition type . 103
Figure B.5 – HasCondition used with an instance declaration . 103
Figure D.1 – The type model of a wrapped COM A&E server . 107
Figure D.2 – Mapping UA Event Types to COM A&E Event Types . 111
Figure D.3 – Example mapping of UA Event Types to COM A&E categories . 112
Figure D.4 – Example mapping of UA Event Types to A&E categories with attributes . 115
Figure F.1 – SystemState transitions . 127
Figure F.2 – SystemStateStateMachineType Model . 128

Table 1 – Parameter types defined in IEC 62541-3 . 15
Table 2 – Parameter types defined in IEC 62541-4 . 15
Table 3 – TwoStateVariableType definition . 26
Table 4 – ConditionVariableType definition . 27
Table 5 – HasTrueSubState ReferenceType . 28
Table 6 – HasFalseSubState ReferenceType . 28
Table 7 – HasAlarmSuppressionGroup ReferenceType . 29
Table 8 – AlarmGroupMember ReferenceType . 29
Table 9 – ConditionType definition . 31
Table 10 – SimpleAttributeOperand . 34
Table 11 – Disable result codes . 34
Table 12 – Disable Method AddressSpace definition . 35
Table 13 – Enable result codes . 35
Table 14 – Enable Method AddressSpace definition . 35
Table 15 – AddComment arguments . 36
Table 16 – AddComment result codes . 36
Table 17 – AddComment Method AddressSpace definition . 36
Table 18 – ConditionRefresh parameters . 37
Table 19 – ConditionRefresh result codes . 37
Table 20 – ConditionRefresh Method AddressSpace definition. 38
Table 21 – ConditionRefresh2 parameters . 38
Table 22 – ConditionRefresh2 result codes . 39
Table 23 – ConditionRefresh2 Method AddressSpace definition . 40
Table 24 – DialogConditionType definition . 41
Table 25 – Respond parameters . 42
Table 26 – Respond Result Codes . 42
Table 27 – Respond Method AddressSpace definition . 42
Table 28 – AcknowledgeableConditionType definition . 43
Table 29 – Acknowledge parameters . 44
Table 30 – Acknowledge result codes . 44
Table 31 – Acknowledge Method AddressSpace definition . 45
Table 32 – Confirm Method parameters . 45

IEC 62541-9:2020 © IEC 2020 – 7 –
Table 33 – Confirm result codes . 45
Table 34 – Confirm Method AddressSpace definition . 46
Table 35 – AlarmConditionType definition . 49
Table 36 – AlarmGroupType definition . 52
Table 37 – Silence result codes . 53
Table 38 – Reset Method AddressSpace definition . 53
Table 39 – Silence result codes . 53
Table 40 – Silence Method AddressSpace definition . 54
Table 41 – Suppress result codes . 54
Table 42 – Suppress Method AddressSpace definition . 55
Table 43 – Unsuppress result codes . 55
Table 44 – Unsuppress Method AddressSpace definition . 55
Table 45 – RemoveFromService result codes . 56
Table 46 – RemoveFromService Method AddressSpace definition . 56
Table 47 – PlaceInService result codes . 57
Table 48 – PlaceInService Method AddressSpace definition . 57
Table 49 –ShelvedStateMachineType definition . 59
Table 50 – ShelvedStateMachineType transitions . 60
Table 51 – Unshelve result codes . 60
Table 52 – Unshelve Method AddressSpace definition . 61
Table 53 – TimedShelve parameters . 61
Table 54 – TimedShelve result codes . 61
Table 55 – TimedShelve Method AddressSpace definition . 62
Table 56 – OneShotShelve result codes . 62
Table 57 – OneShotShelve Method AddressSpace definition . 62
Table 58 – LimitAlarmType definition . 63
Table 59 – ExclusiveLimitStateMachineType definition . 65
Table 60 – ExclusiveLimitStateMachineType transitions . 65
Table 61 – ExclusiveLimitAlarmType definition . 66
Table 62 – NonExclusiveLimitAlarmType definition . 68
Table 63 – NonExclusiveLevelAlarmType definition . 68
Table 64 – ExclusiveLevelAlarmType definition . 69
Table 65 – NonExclusiveDeviationAlarmType definition . 69
Table 66 – ExclusiveDeviationAlarmType definition . 70
Table 67 – NonExclusiveRateOfChangeAlarmType definition . 71
Table 68 – ExclusiveRateOfChangeAlarmType definition . 71
Table 69 – DiscreteAlarmType definition . 72
Table 70 – OffNormalAlarmType Definition . 72
Table 71 – SystemOffNormalAlarmType definition . 73
Table 72 – TripAlarmType definition . 73
Table 73 – InstrumentDiagnosticAlarmType definition . 74
Table 74 – SystemDiagnosticAlarmType definition . 74
Table 75 – CertificateExpirationAlarmType definition . 74

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Table 76 – DiscrepancyAlarmType definition . 75
Table 77 – BaseConditionClassType definition . 76
Table 78 – ProcessConditionClassType definition . 76
Table 79 – MaintenanceConditionClassType definition . 77
Table 80 – SystemConditionClassType definition . 77
Table 81 – SafetyConditionClassType definition . 77
Table 82 – HighlyManagedAlarmConditionClassType definition . 78
Table 83 – TrainingConditionClassType definition . 78
Table 84 – StatisticalConditionClassType definition . 78
Table 85 – TestingConditionSubClassType definition . 79
Table 86 – AuditConditionEventType definition . 80
Table 87 – AuditConditionEnableEventType definition . 80
Table 88 – AuditConditionCommentEventType definition . 81
Table 89 – AuditConditionRespondEventType definition . 81
Table 90 – AuditConditionAcknowledgeEventType definition . 81
Table 91 – AuditConditionConfirmEventType definition . 82
Table 92 – AuditConditionShelvingEventType definition . 82
Table 93 – AuditConditionSuppressionEventType definition . 82
Table 94 – AuditConditionSilenceEventType definition . 83
Table 95 – AuditConditionResetEventType definition . 83
Table 96 – AuditConditionOutOfServiceEventType definition . 83
Table 97 – RefreshStartEventType definition . 84
Table 98 – RefreshEndEventType definition . 84
Table 99 – RefreshRequiredEventType definition . 85
Table 100 – HasCondition ReferenceType . 85
Table 101 – Alarm & Condition result codes . 86
Table 102 – HasEffectDisable ReferenceType . 91
Table 103 – HasEffectEnable ReferenceType . 91
Table 104 – HasEffectSuppress ReferenceType . 92
Table 105 – HasEffectUnsuppress ReferenceType . 92
Table 106 – AlarmMetricsType Definition . 93
Table 107 – AlarmRateVariableType definition . 94
Table 108 – Suppress result codes . 94
Table 109 – Reset Method AddressSpace definition . 95
Table A.1 – Recommended state names for LocaleId "en" . 96
Table A.2 – Recommended display names for LocaleId "en" . 96
Table A.3 – Recommended state names for LocaleId "de" . 97
Table A.4 – Recommended display names for LocaleId "de" . 97
Table A.5 – Recommended state names for LocaleId "fr" . 98
Table A.6 – Recommended display names for LocaleId "fr" . 98
Table A.7 – Recommended dialog response options . 98
Table B.1 – Example of a Condition that only keeps the latest state . 99
Table B.2 – Example of a Condition that maintains previous states via branches . 101

SIST EN IEC 62541-9:20
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