IEC 62541-5:2020
(Main)OPC Unified Architecture - Part 5: Information Model
OPC Unified Architecture - Part 5: Information Model
IEC 62541-5:2020 defines the Information Model of the OPC Unified Architecture. The Information Model describes standardized Nodes of a Server’s AddressSpace. These Nodes are standardized types as well as standardized instances used for diagnostics or as entry points to server-specific Nodes. Thus, the Information Model defines the AddressSpace of an empty OPC UA Server. However, it is not expected that all Servers will provide all of these Nodes.
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 Annex F on User Authentication. Describes the Role Information Model that also allows configuration of Roles.
b) Added new data types: "Union", "Decimal", "OptionSet", "DateString", "TimeString", "DurationString", NormalizedString", "DecimalString", and "AudioDataType".
c) Added Method to request a state change in a Server.
d) Added Method to set Subscription to persistent mode.
e) Added Method to request resending of data from a Subscription.
f) Added concept allowing to temporarily create a file to write to or read from a server in C.4.
g) Added new Variable type to support Selection Lists.
h) Added optional properties to FiniteStateMachineType to expose currently available states and transitions.
i) Added UrisVersion Property to ServerType. This version information can be used for session-less service invocation.
Architecture unifiée OPC - Partie 5: Modèle d'informations
IEC 62541-5:2020 définit le Modèle d'information de l'Architecture unifiée OPC. Le Modèle d'information décrit des Nœuds normalisés de l'AddressSpace d'un Serveur. Ces Nœuds sont des types normalisés ainsi que des instances normalisées utilisés pour le diagnostic ou comme des points d'entrée à des Nœuds spécifiques au serveur. Ainsi, le Modèle d'information définit l'AddressSpace d'un Serveur OPC UA vide. Cependant, tous les Serveurs ne sont pas supposés fournir la totalité de ces Nœuds.
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) ajout de l'Annexe F concernant l'Authentification des utilisateurs; description du Modèle d'information de rôle qui autorise également la configuration des Rôles;
b) ajout de nouveaux types de données: "Union", "Decimal", "OptionSet", "DateString", "TimeString", "DurationString", "NormalizedString", "DecimalString" et "AudioDataType";
c) ajout d'une méthode afin de demander un changement d'état dans un Serveur;
d) ajout d'une méthode afin de définir un Abonnement en mode persistant;
e) ajout d'une méthode afin de demander le renvoi de données à partir d'un Abonnement;
f) ajout en C.4 d'un concept permettant la création temporaire d'un fichier pour l'écriture ou la lecture sur un serveur;
g) ajout d'un nouveau type de Variable afin de prendre en charge les Listes de sélection;
h) ajout de propriétés facultatives au FiniteStateMachineType afin de présenter les états et transitions actuellement disponibles;
i) ajout d'une propriété UrisVersion au ServerType. Ces informations de version peuvent être utilisées pour l'invocation de services sans session.
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IEC 62541-5 ®
Edition 3.0 2020-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
OPC unified architecture –
Part 5: Information Model
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 62541-5 ®
Edition 3.0 2020-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
OPC unified architecture –
Part 5: Information Model
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-8656-2
– 2 – IEC 62541-5:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 15
1 Scope . 18
2 Normative references . 18
3 Terms, definitions, abbreviated terms and conventions . 19
3.1 Terms and definitions . 19
3.2 Abbreviated terms . 19
3.3 Conventions for Node descriptions . 19
4 NodeIds and BrowseNames . 21
4.1 NodeIds . 21
4.2 BrowseNames . 21
5 Common Attributes . 21
5.1 General . 21
5.2 Objects . 22
5.3 Variables . 22
5.4 VariableTypes . 23
5.5 Methods . 23
6 Standard ObjectTypes . 23
6.1 General . 23
6.2 BaseObjectType . 24
6.3 ObjectTypes for the Server Object . 24
6.3.1 ServerType . 24
6.3.2 ServerCapabilitiesType . 27
6.3.3 ServerDiagnosticsType . 30
6.3.4 SessionsDiagnosticsSummaryType . 31
6.3.5 SessionDiagnosticsObjectType . 32
6.3.6 VendorServerInfoType . 32
6.3.7 ServerRedundancyType. 33
6.3.8 TransparentRedundancyType . 33
6.3.9 NonTransparentRedundancyType . 34
6.3.10 NonTransparentNetworkRedundancyType . 34
6.3.11 OperationLimitsType . 35
6.3.12 AddressSpaceFileType . 37
6.3.13 NamespaceMetadataType . 37
6.3.14 NamespacesType . 39
6.4 ObjectTypes used as EventTypes . 40
6.4.1 General . 40
6.4.2 BaseEventType . 40
6.4.3 AuditEventType . 42
6.4.4 AuditSecurityEventType . 43
6.4.5 AuditChannelEventType . 44
6.4.6 AuditOpenSecureChannelEventType . 44
6.4.7 AuditSessionEventType . 45
6.4.8 AuditCreateSessionEventType. 46
6.4.9 AuditUrlMismatchEventType . 47
6.4.10 AuditActivateSessionEventType . 47
6.4.11 AuditCancelEventType . 48
6.4.12 AuditCertificateEventType . 49
6.4.13 AuditCertificateDataMismatchEventType . 49
6.4.14 AuditCertificateExpiredEventType . 50
6.4.15 AuditCertificateInvalidEventType . 50
6.4.16 AuditCertificateUntrustedEventType . 50
6.4.17 AuditCertificateRevokedEventType . 51
6.4.18 AuditCertificateMismatchEventType . 51
6.4.19 AuditNodeManagementEventType . 52
6.4.20 AuditAddNodesEventType . 52
6.4.21 AuditDeleteNodesEventType . 52
6.4.22 AuditAddReferencesEventType . 53
6.4.23 AuditDeleteReferencesEventType. 53
6.4.24 AuditUpdateEventType . 54
6.4.25 AuditWriteUpdateEventType . 54
6.4.26 AuditHistoryUpdateEventType . 55
6.4.27 AuditUpdateMethodEventType . 56
6.4.28 SystemEventType . 56
6.4.29 DeviceFailureEventType . 56
6.4.30 SystemStatusChangeEventType . 57
6.4.31 BaseModelChangeEventType . 57
6.4.32 GeneralModelChangeEventType. 58
6.4.33 SemanticChangeEventType . 58
6.4.34 EventQueueOverflowEventType . 59
6.4.35 ProgressEventType . 59
6.5 ModellingRuleType . 60
6.6 FolderType . 60
6.7 DataTypeEncodingType . 60
6.8 DataTypeSystemType .
6.8 AggregateFunctionType . 61
7 Standard VariableTypes . 61
7.1 General . 61
7.2 BaseVariableType . 61
7.3 PropertyType . 62
7.4 BaseDataVariableType . 62
7.5 ServerVendorCapabilityType . 63
7.6 DataTypeDictionaryType .
7.7 DataTypeDescriptionType .
7.6 ServerStatusType . 64
7.7 BuildInfoType . 65
7.8 ServerDiagnosticsSummaryType . 65
7.9 SamplingIntervalDiagnosticsArrayType . 66
7.10 SamplingIntervalDiagnosticsType . 67
7.11 SubscriptionDiagnosticsArrayType . 67
7.12 SubscriptionDiagnosticsType . 67
7.13 SessionDiagnosticsArrayType . 68
7.14 SessionDiagnosticsVariableType . 69
7.15 SessionSecurityDiagnosticsArrayType . 72
7.16 SessionSecurityDiagnosticsType . 72
7.17 OptionSetType . 73
– 4 – IEC 62541-5:2020 RLV © IEC 2020
7.18 SelectionListType . 74
7.19 AudioVariableType . 75
8 Standard Objects and their Variables . 76
8.1 General . 76
8.2 Objects used to organise the AddressSpace structure . 76
8.2.1 Overview . 76
8.2.2 Root . 76
8.2.3 Views . 77
8.2.4 Objects . 77
8.2.5 Types . 78
8.2.6 ObjectTypes . 78
8.2.7 VariableTypes . 79
8.2.8 ReferenceTypes . 80
8.2.9 DataTypes . 81
8.2.10 OPC Binary .
8.2.11 XML Schema .
8.2.10 EventTypes . 83
8.3 Server Object and its containing Objects . 83
8.3.1 General . 83
8.3.2 Server Object . 84
8.4 ModellingRule Objects . 85
8.4.1 ExposesItsArray . 85
8.4.2 Mandatory . 85
8.4.3 Optional . 86
8.4.4 OptionalPlaceholder . 86
8.4.5 MandatoryPlaceholder . 86
9 Standard Methods . 86
9.1 GetMonitoredItems . 86
9.2 ResendData . 87
9.3 SetSubscriptionDurable . 88
9.4 RequestServerStateChange . 88
10 Standard Views . 89
11 Standard ReferenceTypes . 90
11.1 References . 90
11.2 HierarchicalReferences . 90
11.3 NonHierarchicalReferences . 90
11.4 HasChild . 91
11.5 Aggregates . 91
11.6 Organizes . 92
11.7 HasComponent . 92
11.8 HasOrderedComponent . 92
11.9 HasProperty . 92
11.10 HasSubtype . 93
11.11 HasModellingRule . 93
11.12 HasTypeDefinition. 93
11.13 HasEncoding . 94
11.14 HasDescription .
11.14 HasEventSource . 94
11.15 HasNotifier . 95
11.16 GeneratesEvent . 95
11.17 AlwaysGeneratesEvent . 95
12 Standard DataTypes . 96
12.1 Overview. 96
12.2 DataTypes defined in IEC 62541‑3 . 96
12.3 DataTypes defined in IEC 62541‑4 . 103
12.4 BuildInfo . 104
12.5 RedundancySupport . 104
12.6 ServerState . 105
12.7 RedundantServerDataType . 106
12.8 SamplingIntervalDiagnosticsDataType . 106
12.9 ServerDiagnosticsSummaryDataType . 107
12.10 ServerStatusDataType . 108
12.11 SessionDiagnosticsDataType . 108
12.12 SessionSecurityDiagnosticsDataType . 111
12.13 ServiceCounterDataType . 112
12.14 StatusResult . 113
12.15 SubscriptionDiagnosticsDataType . 113
12.16 ModelChangeStructureDataType . 115
12.17 SemanticChangeStructureDataType . 116
12.18 BitFieldMaskDataType . 116
12.19 NetworkGroupDataType . 116
12.20 EndpointUrlListDataType . 117
12.21 KeyValuePair . 117
12.22 EndpointType . 118
Annex A (informative) Design decisions when modelling the server information . 119
A.1 Overview. 119
A.2 ServerType and Server Object . 119
A.3 Typed complex Objects beneath the Server Object . 119
A.4 Properties versus DataVariables . 119
A.5 Complex Variables using complex DataTypes . 120
A.6 Complex Variables having an array . 120
A.7 Redundant information . 120
A.8 Usage of the BaseDataVariableType . 121
A.9 Subtyping . 121
A.10 Extensibility mechanism . 121
Annex B (normative) StateMachines . 122
B.1 General . 122
B.2 Examples of finite state machines . 122
B.2.1 Simple state machine . 122
B.2.2 State machine containing substates . 123
B.3 Definition of state machine . 124
B.4 Representation of state machines in the AddressSpace . 124
B.4.1 Overview . 124
B.4.2 StateMachineType . 125
B.4.3 StateVariableType . 126
B.4.4 TransitionVariableType . 127
B.4.5 FiniteStateMachineType . 128
– 6 – IEC 62541-5:2020 RLV © IEC 2020
B.4.6 FiniteStateVariableType . 130
B.4.7 FiniteTransitionVariableType . 131
B.4.8 StateType . 132
B.4.9 InitialStateType . 132
B.4.10 TransitionType . 133
B.4.11 FromState. 133
B.4.12 ToState. 134
B.4.13 HasCause . 134
B.4.14 HasEffect . 135
B.4.15 HasSubStateMachine . 135
B.4.16 TransitionEventType . 136
B.4.17 AuditUpdateStateEventType . 136
B.4.18 Special Restrictions on subtyping StateMachines . 137
B.4.19 Specific StatusCodes for StateMachines . 137
B.5 Examples of StateMachines in the AddressSpace . 138
B.5.1 StateMachineType using inheritance . 138
B.5.2 StateMachineType with a sub-machine SubStateMachine using
inheritance . 139
B.5.3 StateMachineType using containment . 140
B.5.4 Example of a StateMachine having Transition to SubStateMachine . 140
Annex C (normative) File Transfer . 143
C.1 Overview. 143
C.2 FileType . 143
C.2.1 General . 143
C.2.2 Open . 144
C.2.3 Close . 145
C.2.4 Read . 146
C.2.5 Write. 147
C.2.6 GetPosition . 148
C.2.7 SetPosition . 148
C.3 File System . 149
C.3.1 FileDirectoryType . 149
C.3.2 FileSystem Object . 150
C.3.3 CreateDirectory . 150
C.3.4 CreateFile . 151
C.3.5 Delete . 152
C.3.6 MoveOrCopy . 153
C.4 Temporary file transfer . 154
C.4.1 TemporaryFileTransferType . 154
C.4.2 File transfer sequences . 155
C.4.3 GenerateFileForRead . 156
C.4.4 GenerateFileForWrite . 157
C.4.5 CloseAndCommit . 157
C.4.6 FileTransferStateMachineType . 158
C.4.7 Reset . 161
Annex D (normative) DataTypeDictionary. 162
D.1 Overview. 162
D.2 Data Type Model . 162
D.3 DataTypeDictionary, DataTypeDescription, DataTypeEncoding and
DataTypeSystem. 163
D.4 AddressSpace organization. 165
D.5 Node definitions . 167
D.5.1 HasDescription . 167
D.5.2 DataTypeDictionaryType . 167
D.5.3 DataTypeDescriptionType . 168
D.5.4 DataTypeSystemType . 168
D.5.5 OPC Binary . 168
D.5.6 XML Schema . 169
Annex E (normative) OPC Binary Type Description System . 170
E.1 Concepts . 170
E.2 Schema description . 171
E.2.1 TypeDictionary . 171
E.2.2 TypeDescription . 171
E.2.3 OpaqueType . 172
E.2.4 EnumeratedType . 172
E.2.5 StructuredType . 173
E.2.6 FieldType . 173
E.2.7 EnumeratedValue . 175
E.2.8 ByteOrder . 175
E.2.9 ImportDirective . 176
E.3 Standard Type descriptions . 176
E.4 Type description examples . 177
E.4.1 A 128-bit signed integer . 177
E.4.2 A 16-bit value divided into several fields . 177
E.4.3 A structured type with optional fields . 177
E.4.4 An array of integers . 177
E.4.5 An array of integers with a terminator instead of a length prefix . 177
E.4.6 A simple union . 177
E.4.7 An enumerated type . 178
E.4.8 A nillable array . 178
E.5 OPC Binary XML schema . 178
E.6 OPC Binary Standard TypeDictionary . 180
Annex F (normative) User Authorization . 182
F.1 Overview. 182
F.2 RoleSetType . 182
F.2.1 RoleSetType definition . 182
F.2.2 AddRole Method . 182
F.2.3 RemoveRole Method . 183
F.3 RoleType . 184
F.3.1 RoleType definition . 184
F.3.2 IdentityMappingRuleType . 185
F.3.3 AddIdentity Method . 186
F.3.4 RemoveIdentity Method . 186
F.3.5 AddApplication Method . 187
F.3.6 RemoveApplication Method . 187
F.3.7 AddEndpoint Method . 188
F.3.8 RemoveEndpoint Method . 188
– 8 – IEC 62541-5:2020 RLV © IEC 2020
F.4 RoleMappingRuleChangedAuditEventType . 189
Figure 1 – Standard AddressSpace structure . 76
Figure 2 – Views organization . 77
Figure 3 – Objects organization . 78
Figure 4 – ObjectTypes organization . 79
Figure 5 – VariableTypes organization . 79
Figure 6 – ReferenceType definitions . 80
Figure7 – DataType Organization .
Figure 7 – EventTypes organization . 83
Figure 8 – Excerpt of diagnostic information of the Server . 84
Figure B.1 – Example of a simple state machine . 123
Figure B.2 – Example of a state machine having a sub-machine . 123
Figure B.3 – The StateMachine Information Model . 125
Figure B.4 – Example of a FiniteStateMachine type . 130
Figure B.5 – Example of a FiniteStateMachine instance . 130
Figure B.6 – Example of an initial State in a sub-machine . 132
Figure B.7 – Example of a StateMachineType using inheritance . 138
Figure B.8 – Example of a StateMachineType with a SubStateMachine using
inheritance . 139
Figure B.9 – Example of a StateMachineType using containment . 140
Figure B.10 – Example of a StateMachine with Transitions from sub-states . 141
Figure B.11 – Example of a StateMachineType having Transition to SubStateMachine . 142
Figure C.1 – FileSystem example . 150
Figure C.2 – Read file transfer example sequence . 155
Figure C.3 – Write file transfer example sequence . 155
Figure C.4 – File transfer States . 158
Figure C.5 – FileTransferStateMachineType . 159
Figure D.1 – DataType model . 162
Figure D.2 – Example of DataType modelling . 165
Figure D.3 – DataTypes organization . 166
Figure E.1 – OPC Binary Dictionary structure . 170
Table 1 – Examples of DataTypes . 20
Table 2 –TypeDefinitionTable . 20
Table 3 – Common Node Attributes . 22
Table 4 – Common Object Attributes . 22
Table 5 – Common Variable Attributes . 23
Table 6 – Common VariableType Attributes . 23
Table 7 – Common Method Attributes . 23
Table 8 – BaseObjectType definition . 24
Table 9 – ServerType definition . 25
Table 10 – ServerCapabilitiesType definition . 28
Table 11 – ServerDiagnosticsType definition . 30
Table 12 – SessionsDiagnosticsSummaryType definition . 31
Table 13 – SessionDiagnosticsObjectType definition . 32
Table 14 – VendorServerInfoType definition . 33
Table 15 – ServerRedundancyType definition . 33
Table 16 – TransparentRedundancyType definition . 33
Table 17 – NonTransparentRedundancyType definition . 34
Table 18 – NonTransparentNetworkRedundancyType definition . 35
Table 19 – OperationLimitsType definition . 36
Table 20 – AddressSpaceFileType definition . 37
Table 21 – NamespaceMetadataType definition . 38
Table 22 – NamespacesType definition . 39
Table 23 – BaseEventType definition . 40
Table 24 – AuditEventType definition . 43
Table 25 – AuditSecurityEventType definition . 44
Table 26 – AuditChannelEventType definition . 44
Table 27 – AuditOpenSecureChannelEventType definition .
...
IEC 62541-5 ®
Edition 3.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 5: Information Model
Architecture unifiée OPC –
Partie 5: Modèle d'information
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
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committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 62541-5 ®
Edition 3.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
OPC unified architecture –
Part 5: Information Model
Architecture unifiée OPC –
Partie 5: Modèle d'information
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-8592-3
– 2 – IEC 62541-5:2020 © IEC 2020
CONTENTS
FOREWORD . 14
1 Scope . 16
2 Normative references . 16
3 Terms, definitions, abbreviated terms and conventions . 17
3.1 Terms and definitions . 17
3.2 Abbreviated terms . 17
3.3 Conventions for Node descriptions . 17
4 NodeIds and BrowseNames . 19
4.1 NodeIds . 19
4.2 BrowseNames . 19
5 Common Attributes . 19
5.1 General . 19
5.2 Objects . 20
5.3 Variables . 20
5.4 VariableTypes . 21
5.5 Methods . 21
6 Standard ObjectTypes . 21
6.1 General . 21
6.2 BaseObjectType . 22
6.3 ObjectTypes for the Server Object . 22
6.3.1 ServerType . 22
6.3.2 ServerCapabilitiesType . 25
6.3.3 ServerDiagnosticsType . 28
6.3.4 SessionsDiagnosticsSummaryType . 29
6.3.5 SessionDiagnosticsObjectType . 29
6.3.6 VendorServerInfoType . 30
6.3.7 ServerRedundancyType. 30
6.3.8 TransparentRedundancyType . 31
6.3.9 NonTransparentRedundancyType . 31
6.3.10 NonTransparentNetworkRedundancyType . 32
6.3.11 OperationLimitsType . 33
6.3.12 AddressSpaceFileType . 34
6.3.13 NamespaceMetadataType . 35
6.3.14 NamespacesType . 36
6.4 ObjectTypes used as EventTypes . 37
6.4.1 General . 37
6.4.2 BaseEventType . 37
6.4.3 AuditEventType . 40
6.4.4 AuditSecurityEventType . 41
6.4.5 AuditChannelEventType . 42
6.4.6 AuditOpenSecureChannelEventType . 42
6.4.7 AuditSessionEventType . 43
6.4.8 AuditCreateSessionEventType. 44
6.4.9 AuditUrlMismatchEventType . 45
6.4.10 AuditActivateSessionEventType . 45
6.4.11 AuditCancelEventType . 46
6.4.12 AuditCertificateEventType . 47
6.4.13 AuditCertificateDataMismatchEventType . 47
6.4.14 AuditCertificateExpiredEventType . 48
6.4.15 AuditCertificateInvalidEventType . 48
6.4.16 AuditCertificateUntrustedEventType . 48
6.4.17 AuditCertificateRevokedEventType . 49
6.4.18 AuditCertificateMismatchEventType . 49
6.4.19 AuditNodeManagementEventType . 50
6.4.20 AuditAddNodesEventType . 50
6.4.21 AuditDeleteNodesEventType . 50
6.4.22 AuditAddReferencesEventType . 51
6.4.23 AuditDeleteReferencesEventType. 51
6.4.24 AuditUpdateEventType . 52
6.4.25 AuditWriteUpdateEventType . 52
6.4.26 AuditHistoryUpdateEventType . 53
6.4.27 AuditUpdateMethodEventType . 54
6.4.28 SystemEventType . 54
6.4.29 DeviceFailureEventType . 54
6.4.30 SystemStatusChangeEventType . 55
6.4.31 BaseModelChangeEventType . 55
6.4.32 GeneralModelChangeEventType. 56
6.4.33 SemanticChangeEventType . 56
6.4.34 EventQueueOverflowEventType . 57
6.4.35 ProgressEventType . 57
6.5 ModellingRuleType . 58
6.6 FolderType . 58
6.7 DataTypeEncodingType . 58
6.8 AggregateFunctionType . 58
7 Standard VariableTypes . 59
7.1 General . 59
7.2 BaseVariableType . 59
7.3 PropertyType . 59
7.4 BaseDataVariableType . 60
7.5 ServerVendorCapabilityType . 60
7.6 ServerStatusType . 61
7.7 BuildInfoType . 61
7.8 ServerDiagnosticsSummaryType . 62
7.9 SamplingIntervalDiagnosticsArrayType . 63
7.10 SamplingIntervalDiagnosticsType . 63
7.11 SubscriptionDiagnosticsArrayType . 63
7.12 SubscriptionDiagnosticsType . 64
7.13 SessionDiagnosticsArrayType . 65
7.14 SessionDiagnosticsVariableType . 66
7.15 SessionSecurityDiagnosticsArrayType . 69
7.16 SessionSecurityDiagnosticsType . 69
7.17 OptionSetType . 70
7.18 SelectionListType . 71
7.19 AudioVariableType . 72
– 4 – IEC 62541-5:2020 © IEC 2020
8 Standard Objects and their Variables . 73
8.1 General . 73
8.2 Objects used to organise the AddressSpace structure . 73
8.2.1 Overview . 73
8.2.2 Root . 73
8.2.3 Views . 74
8.2.4 Objects . 74
8.2.5 Types . 75
8.2.6 ObjectTypes . 75
8.2.7 VariableTypes . 76
8.2.8 ReferenceTypes . 77
8.2.9 DataTypes . 78
8.2.10 EventTypes . 78
8.3 Server Object and its containing Objects . 79
8.3.1 General . 79
8.3.2 Server Object . 80
8.4 ModellingRule Objects . 80
8.4.1 ExposesItsArray . 80
8.4.2 Mandatory . 81
8.4.3 Optional . 81
8.4.4 OptionalPlaceholder . 81
8.4.5 MandatoryPlaceholder . 82
9 Standard Methods . 82
9.1 GetMonitoredItems . 82
9.2 ResendData . 83
9.3 SetSubscriptionDurable . 83
9.4 RequestServerStateChange . 84
10 Standard Views . 85
11 Standard ReferenceTypes . 85
11.1 References . 85
11.2 HierarchicalReferences . 86
11.3 NonHierarchicalReferences . 86
11.4 HasChild . 87
11.5 Aggregates . 87
11.6 Organizes . 87
11.7 HasComponent . 87
11.8 HasOrderedComponent . 88
11.9 HasProperty . 88
11.10 HasSubtype . 88
11.11 HasModellingRule . 89
11.12 HasTypeDefinition. 89
11.13 HasEncoding . 89
11.14 HasEventSource . 90
11.15 HasNotifier . 90
11.16 GeneratesEvent . 90
11.17 AlwaysGeneratesEvent . 91
12 Standard DataTypes . 91
12.1 Overview. 91
12.2 DataTypes defined in IEC 62541‑3 . 91
12.3 DataTypes defined in IEC 62541‑4 . 98
12.4 BuildInfo . 99
12.5 RedundancySupport . 99
12.6 ServerState . 100
12.7 RedundantServerDataType . 101
12.8 SamplingIntervalDiagnosticsDataType . 101
12.9 ServerDiagnosticsSummaryDataType . 102
12.10 ServerStatusDataType . 102
12.11 SessionDiagnosticsDataType . 103
12.12 SessionSecurityDiagnosticsDataType . 106
12.13 ServiceCounterDataType . 107
12.14 StatusResult . 107
12.15 SubscriptionDiagnosticsDataType . 107
12.16 ModelChangeStructureDataType . 109
12.17 SemanticChangeStructureDataType . 110
12.18 BitFieldMaskDataType . 110
12.19 NetworkGroupDataType . 110
12.20 EndpointUrlListDataType . 111
12.21 KeyValuePair . 111
12.22 EndpointType . 112
Annex A (informative) Design decisions when modelling the server information . 113
A.1 Overview. 113
A.2 ServerType and Server Object . 113
A.3 Typed complex Objects beneath the Server Object . 113
A.4 Properties versus DataVariables . 113
A.5 Complex Variables using complex DataTypes . 114
A.6 Complex Variables having an array . 114
A.7 Redundant information . 114
A.8 Usage of the BaseDataVariableType . 115
A.9 Subtyping . 115
A.10 Extensibility mechanism . 115
Annex B (normative) StateMachines . 116
B.1 General . 116
B.2 Examples of finite state machines . 116
B.2.1 Simple state machine . 116
B.2.2 State machine containing substates . 117
B.3 Definition of state machine . 118
B.4 Representation of state machines in the AddressSpace . 118
B.4.1 Overview . 118
B.4.2 StateMachineType . 119
B.4.3 StateVariableType . 120
B.4.4 TransitionVariableType . 121
B.4.5 FiniteStateMachineType . 122
B.4.6 FiniteStateVariableType . 124
B.4.7 FiniteTransitionVariableType . 125
B.4.8 StateType . 126
B.4.9 InitialStateType . 126
B.4.10 TransitionType . 127
– 6 – IEC 62541-5:2020 © IEC 2020
B.4.11 FromState. 127
B.4.12 ToState. 128
B.4.13 HasCause . 128
B.4.14 HasEffect . 129
B.4.15 HasSubStateMachine . 129
B.4.16 TransitionEventType . 130
B.4.17 AuditUpdateStateEventType . 130
B.4.18 Special Restrictions on subtyping StateMachines . 131
B.4.19 Specific StatusCodes for StateMachines . 131
B.5 Examples of StateMachines in the AddressSpace . 132
B.5.1 StateMachineType using inheritance . 132
B.5.2 StateMachineType with a SubStateMachine using inheritance . 133
B.5.3 StateMachineType using containment . 134
B.5.4 Example of a StateMachine having Transition to SubStateMachine . 134
Annex C (normative) File Transfer . 137
C.1 Overview. 137
C.2 FileType . 137
C.2.1 General . 137
C.2.2 Open . 138
C.2.3 Close . 139
C.2.4 Read . 140
C.2.5 Write. 141
C.2.6 GetPosition . 142
C.2.7 SetPosition . 142
C.3 File System . 143
C.3.1 FileDirectoryType . 143
C.3.2 FileSystem Object . 144
C.3.3 CreateDirectory . 144
C.3.4 CreateFile . 145
C.3.5 Delete . 146
C.3.6 MoveOrCopy . 147
C.4 Temporary file transfer . 148
C.4.1 TemporaryFileTransferType . 148
C.4.2 File transfer sequences . 149
C.4.3 GenerateFileForRead . 150
C.4.4 GenerateFileForWrite . 151
C.4.5 CloseAndCommit . 151
C.4.6 FileTransferStateMachineType . 152
C.4.7 Reset . 155
Annex D (normative) DataTypeDictionary. 156
D.1 Overview. 156
D.2 Data Type Model . 156
D.3 DataTypeDictionary, DataTypeDescription, DataTypeEncoding and
DataTypeSystem. 157
D.4 AddressSpace organization. 159
D.5 Node definitions . 161
D.5.1 HasDescription . 161
D.5.2 DataTypeDictionaryType . 161
D.5.3 DataTypeDescriptionType . 162
D.5.4 DataTypeSystemType . 162
D.5.5 OPC Binary . 162
D.5.6 XML Schema . 163
Annex E (normative) OPC Binary Type Description System . 164
E.1 Concepts . 164
E.2 Schema description . 165
E.2.1 TypeDictionary . 165
E.2.2 TypeDescription . 165
E.2.3 OpaqueType . 166
E.2.4 EnumeratedType . 166
E.2.5 StructuredType . 167
E.2.6 FieldType . 167
E.2.7 EnumeratedValue . 169
E.2.8 ByteOrder . 169
E.2.9 ImportDirective . 170
E.3 Standard Type descriptions . 170
E.4 Type description examples . 171
E.4.1 A 128-bit signed integer . 171
E.4.2 A 16-bit value divided into several fields . 171
E.4.3 A structured type with optional fields . 171
E.4.4 An array of integers . 171
E.4.5 An array of integers with a terminator instead of a length prefix . 171
E.4.6 A simple union . 171
E.4.7 An enumerated type . 172
E.4.8 A nillable array . 172
E.5 OPC Binary XML schema . 172
E.6 OPC Binary Standard TypeDictionary . 174
Annex F (normative) User Authorization . 176
F.1 Overview. 176
F.2 RoleSetType . 176
F.2.1 RoleSetType definition . 176
F.2.2 AddRole Method . 176
F.2.3 RemoveRole Method . 177
F.3 RoleType . 178
F.3.1 RoleType definition . 178
F.3.2 IdentityMappingRuleType . 179
F.3.3 AddIdentity Method . 180
F.3.4 RemoveIdentity Method . 180
F.3.5 AddApplication Method . 181
F.3.6 RemoveApplication Method . 181
F.3.7 AddEndpoint Method . 182
F.3.8 RemoveEndpoint Method . 182
F.4 RoleMappingRuleChangedAuditEventType . 183
Figure 1 – Standard AddressSpace structure . 73
Figure 2 – Views organization . 74
Figure 3 – Objects organization . 75
Figure 4 – ObjectTypes organization . 76
– 8 – IEC 62541-5:2020 © IEC 2020
Figure 5 – VariableTypes organization . 76
Figure 6 – ReferenceType definitions . 77
Figure 7 – EventTypes organization . 78
Figure 8 – Excerpt of diagnostic information of the Server . 80
Figure B.1 – Example of a simple state machine . 117
Figure B.2 – Example of a state machine having a sub-machine . 117
Figure B.3 – The StateMachine Information Model . 119
Figure B.4 – Example of a FiniteStateMachine type . 124
Figure B.5 – Example of a FiniteStateMachine instance . 124
Figure B.6 – Example of an initial State in a sub-machine . 126
Figure B.7 – Example of a StateMachineType using inheritance . 132
Figure B.8 – Example of a StateMachineType with a SubStateMachine using
inheritance . 133
Figure B.9 – Example of a StateMachineType using containment . 134
Figure B.10 – Example of a StateMachine with Transitions from sub-states . 135
Figure B.11 – Example of a StateMachineType having Transition to SubStateMachine . 136
Figure C.1 – FileSystem example . 144
Figure C.2 – Read file transfer example sequence . 149
Figure C.3 – Write file transfer example sequence . 149
Figure C.4 – File transfer States . 152
Figure C.5 – FileTransferStateMachineType . 153
Figure D.1 – DataType model . 156
Figure D.2 – Example of DataType modelling . 159
Figure D.3 – DataTypes organization . 160
Figure E.1 – OPC Binary Dictionary structure . 164
Table 1 – Examples of DataTypes . 18
Table 2 –TypeDefinitionTable . 18
Table 3 – Common Node Attributes . 20
Table 4 – Common Object Attributes . 20
Table 5 – Common Variable Attributes . 21
Table 6 – Common VariableType Attributes . 21
Table 7 – Common Method Attributes . 21
Table 8 – BaseObjectType definition . 22
Table 9 – ServerType definition . 23
Table 10 – ServerCapabilitiesType definition . 26
Table 11 – ServerDiagnosticsType definition . 28
Table 12 – SessionsDiagnosticsSummaryType definition . 29
Table 13 – SessionDiagnosticsObjectType definition .
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