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BS EN IEC 62541-14:2020

BS EN IEC 62541-14:2020

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OPC unified architecture – PubSub

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BSI 2020 196
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IEC 62541-14:2020 defines the OPC Unified Architecture (OPC UA) PubSub communication model. It defines an OPC UA publish subscribe pattern which complements the client server pattern defined by the Services in IEC 62541-4. IEC TR 62541-1 gives an overview of the two models and their distinct uses. PubSub allows the distribution of data and events from an OPC UA information source to interested observers inside a device network as well as in IT and analytics cloud systems. This document consists of โ€ข a general introduction of the PubSub concepts, โ€ข a definition of the PubSub configuration parameters, โ€ข mapping of PubSub concepts and configuration parameters to messages and transport protocols, and โ€ข a PubSub configuration model. Not all OPC UA Applications will need to implement all defined message and transport protocol mappings. IEC 62541-7 defines the Profile that dictates which mappings need to be implemented in order to be compliant with a particular Profile.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
5 Annex ZA (normative) Normative references to international publications with their corresponding European publications
7 English
CONTENTS
15 FOREWORD
17 1 Scope
2 Normative references
18 3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
19 3.2 Abbreviated terms
4 Overview
4.1 Fields of application
20 4.2 Abstraction layers
4.3 Decoupling by use of middleware
Figures
Figure 1 โ€“ Publish Subscribe Model overview
21 4.4 Synergy of models
5 PubSub Concepts
5.1 General
22 5.2 DataSet
5.2.1 General
Figure 2 โ€“ Publisher and Subscriber entities
23 5.2.2 DataSetClass
5.2.3 DataSetMetaData
Figure 3 โ€“ DataSet in the process of publishing
24 5.3 Messages
5.3.1 General
25 5.3.2 DataSetMessage field
5.3.3 DataSetMessage
Figure 4 โ€“ OPC UA PubSub message layers
26 5.3.4 NetworkMessage
5.3.5 Message security
27 5.3.6 Transport security
5.3.7 SecurityGroup
5.4 Entities
5.4.1 Publisher
28 Figure 5 โ€“ Publisher details
29 Figure 6 โ€“ Publisher message sending sequence
30 5.4.2 Subscriber
Figure 7 โ€“ Subscriber details
31 5.4.3 Security Key Service
Figure 8 โ€“ Subscriber message reception sequence
32 Figure 9 โ€“ SecurityGroup management sequence
33 Figure 10 โ€“ Handshake used to pull keys from SKS
Figure 11 โ€“ Handshake used to push keys to Publishers and Subscribers
34 5.4.4 Message Oriented Middleware
Figure 12 โ€“ Handshake with a Security Key Service
35 Figure 13 โ€“ PubSub using network infrastructure
Figure 14 โ€“ UDP Multicast overview
36 Figure 15 โ€“ PubSub using broker
37 Figure 16 โ€“ Broker overview
38 6 PubSub communication parameters
6.1 Overview
Figure 17 โ€“ PubSub component overview
39 6.2 Common Configuration Parameters
6.2.1 PubSubState State Machine
Figure 18 โ€“ PubSub mapping specific parameters overview
40 Figure 19 โ€“ PubSub component state dependencies
Figure 20 โ€“ PubSubState state machine
Tables
Table 1 โ€“ PubSubState values
41 6.2.2 PublishedDataSet parameters
Table 2 โ€“ PubSubState state machine
Table 3 โ€“ DataSetMetaDataType structure
42 Table 4 โ€“ DataSetMetaDataType definition
Table 5 โ€“ FieldMetaData structure
44 Table 6 โ€“ DataSetFieldFlags values
Table 7 โ€“ DataSetFieldFlags definition
45 Table 8 โ€“ ConfigurationVersionDataType structure
46 Table 9 โ€“ PublishedDataSetDataType structure
Table 10 โ€“ PublishedDataSetSourceDataType definition
47 Table 11 โ€“ PublishedVariableDataType structure
48 Table 12 โ€“ PublishedDataItemsDataType structure
Table 13 โ€“ PublishedEventsDataType structure
49 6.2.3 DataSetWriter Parameters
Table 14 โ€“ DataSetFieldContentMask values
50 Figure 21 โ€“ PubSub Information Flow dependency to field representation
Table 15 โ€“ DataSetFieldContentMask definition
51 Table 16 โ€“ DataSetMessage field representation options
52 Table 17 โ€“ DataSetWriterDataType structure
Table 18 โ€“ DataSetWriterTransportDataType definition
53 6.2.4 Shared PubSubGroup Parameters
Table 19 โ€“ DataSetWriterMessageDataType structure
54 Table 20 โ€“ PubSubGroupDataType structure
Table 21 โ€“ PubSubGroupDataType definition
55 6.2.5 WriterGroup parameters
56 Table 22 โ€“ WriterGroupDataType structure
Table 23 โ€“ WriterGroupDataType definition
57 6.2.6 PubSubConnection Parameters
Table 24 โ€“ WriterGroupTransportDataType definition
Table 25 โ€“ WriterGroupMessageDataType structure
58 Table 26 โ€“ PubSubConnectionDataType structure
59 Table 27 โ€“ ConnectionTransportDataType definition
Table 28 โ€“ NetworkAddressDataType structure
Table 29 โ€“ NetworkAddressDataType definition
Table 30 โ€“ NetworkAddressUrlDataType structure
60 6.2.7 ReaderGroup parameters
Table 31 โ€“ NetworkAddressUrlDataType definition
Table 32 โ€“ ReaderGroupDataType structure
Table 33 โ€“ ReaderGroupDataType definition
61 6.2.8 DataSetReader Parameters
Table 34 โ€“ ReaderGroupTransportDataType definition
Table 35 โ€“ ReaderGroupMessageDataType structure
64 Table 36 โ€“ DataSetReaderDataType structure
Table 37 โ€“ DataSetReaderTransportDataType structure
65 6.2.9 SubscribedDataSet Parameters
Table 38 โ€“ DataSetReaderTransportDataType definition
Table 39 โ€“ DataSetReaderMessageDataType structure
Table 40 โ€“ DataSetReaderMessageDataType definition
Table 41 โ€“ SubscribedDataSetDataType structure
66 Table 42 โ€“ SubscribedDataSetDataType Definition
Table 43 โ€“ TargetVariablesDataType structure
67 Table 44 โ€“ FieldTargetDataType structure
68 6.2.10 Information flow and status handling
Table 45 โ€“ OverrideValueHandling values
Table 46 โ€“ SubscribedDataSetMirrorDataType structure
69 Figure 22 โ€“ PubSub information flow
Table 47 โ€“ Source to message input mapping
70 6.2.11 PubSubConfigurationDataType
Table 48 โ€“ Message output to target mapping
Table 49 โ€“ PubSubConfigurationDataType structure
71 6.3 Message mapping configuration parameters
6.3.1 UADP message mapping
Table 50 โ€“ PubSubConfiguration file content
72 Figure 23 โ€“ Start of the periodic publisher execution
Figure 24 โ€“ Timing offsets in a PublishingInterval
73 Figure 25 โ€“ DataSetOrdering and MaxNetworkMessageSize
Table 51 โ€“ DataSetOrderingType values
74 Table 52 โ€“ UadpNetworkMessageContentMask values
Table 53 โ€“ UadpNetworkMessageContentMask definition
75 Figure 26 โ€“ PublishingOffset options for multiple NetworkMessages
76 Table 54 โ€“ UadpWriterGroupMessageDataType structure
Table 55 โ€“ UadpDataSetMessageContentMask values
77 Table 56 โ€“ UadpDataSetMessageContentMask definition
78 Table 57 โ€“ UadpDataSetWriterMessageDataType structure
79 6.3.2 JSON message mapping
Table 58 โ€“ UadpDataSetReaderMessageDataType structure
80 Table 59 โ€“ JsonNetworkMessageContentMask values
Table 60 โ€“ JsonNetworkMessageContentMask definition
Table 61 โ€“ JsonWriterGroupMessageDataType structure
81 Table 62 โ€“ JsonDataSetMessageContentMask values
Table 63 โ€“ JsonDataSetMessageContentMask definition
Table 64 โ€“ JsonDataSetWriterMessageDataType structure
82 6.4 Transport Protocol mapping configuration parameters
6.4.1 Datagram Transport Protocol
Table 65 โ€“ JsonDataSetReaderMessageDataType structure
Table 66 โ€“ DatagramConnectionTransportDataType structure
83 6.4.2 Broker Transport Protocol
Table 67 โ€“ DatagramWriterGroupTransportDataType structure
84 Table 68 โ€“ BrokerConnectionTransportDataType structure
85 Table 69 โ€“ BrokerTransportQualityOfService values
Table 70 โ€“ BrokerWriterGroupTransportDataType structure
87 Table 71 โ€“ BrokerDataSetWriterTransportDataType structure
88 7 PubSub mappings
7.1 General
7.2 Message mappings
7.2.1 General
7.2.2 UADP message mapping
Table 72 โ€“ BrokerDataSetReaderTransportDataType structure
89 Figure 27 โ€“ UADP NetworkMessage
Table 73 โ€“ UADP NetworkMessage
92 Table 74 โ€“ Layout of the key data for UADP message security
93 Table 75 โ€“ Layout of the MessageNonce for AES-CTR
Table 76 โ€“ Layout of the counter block for UADP message security
94 Table 77 โ€“ Chunked NetworkMessage payload header
Table 78 โ€“ Chunked NetworkMessage payload fields
95 Figure 28 โ€“ UADP DataSet payload
Table 79 โ€“ UADP DataSet payload header
96 Figure 29 โ€“ DataSetMessage header structure
Table 80 โ€“ UADP DataSet payload
97 Table 81 โ€“ DataSetMessage header structure
98 Figure 30 โ€“ Data Key Frame DataSetMessage data
Table 82 โ€“ Data Key Frame DataSetMessage structure
99 Figure 31 โ€“ Data Delta Frame DataSetMessage
Table 83 โ€“ Data Delta Frame DataSetMessage structure
100 Figure 32 โ€“ Event DataSetMessage
Figure 33 โ€“ KeepAlive message
Table 84 โ€“ Event DataSetMessage structure
102 Table 85 โ€“ Discovery request header structure
Table 86 โ€“ Publisher information request message structure
103 Table 87 โ€“ Discovery response header structure
Table 88 โ€“ Publisher Endpoints message structure
Table 89 โ€“ DataSetMetaData message structure
104 7.2.3 JSON message mapping
Table 90 โ€“ DataSetWriter configuration message structure
Table 91 โ€“ JSON NetworkMessage definition
106 Table 92 โ€“ JSON DataSetMessage definition
107 7.3 Transport Protocol Mappings
7.3.1 General
7.3.2 OPC UA UDP
Table 93 โ€“ JSON DataSetMetaData definition
108 7.3.3 OPC UA Ethernet
Table 94 โ€“ UADP message transported over UDP
109 7.3.4 AMQP
Table 95 โ€“ UADP message transported over Ethernet
111 Table 96 โ€“ AMQP standard header fields
112 Table 97 โ€“ OPC UA AMQP standard header QualifiedName Name mappings
113 Table 98 โ€“ OPC UA AMQP header field conversion rules
114 7.3.5 MQTT
116 8 PubSub security key service model
8.1 Overview
8.2 PublishSubscribe Object
Figure 34 โ€“ PublishSubscribe Object Types overview
117 8.3 PubSubKeyServiceType
8.4 GetSecurityKeys method
Table 99 โ€“ PublishSubscribe Object definition
Table 100 โ€“ PubSubKeyServiceType definition
119 8.5 GetSecurityGroup method
120 8.6 SecurityGroupType
Table 101 โ€“ SecurityGroupType definition
121 8.7 SecurityGroupFolderType
8.8 AddSecurityGroup Method
Table 102 โ€“ SecurityGroupFolderType definition
122 8.9 RemoveSecurityGroup Method
9 PubSub configuration model
9.1 Common configuration model
9.1.1 General
123 Figure 35 โ€“ PubSub configuration model overview
124 Figure 36 โ€“ PubSub example Objects
Figure 37 โ€“ PubSub information flow
125 9.1.2 Configuration behaviours
9.1.3 Types for the PublishSubscribe Object
126 Figure 38 โ€“ PublishSubscribe Object Types overview
127 Table 103 โ€“ PublishSubscribeType definition
130 9.1.4 Published DataSet Model
Figure 39 โ€“ Published DataSet overview
Table 104 โ€“ HasPubSubConnection ReferenceType
131 Table 105 โ€“ PublishedDataSetType definition
132 Table 106 โ€“ ExtensionFieldsType definition
133 Table 107 โ€“ Well-Known Extension Field Names
134 Table 108 โ€“ DataSetToWriter ReferenceType
135 Table 109 โ€“ PublishedDataItemsType definition
138 Table 110 โ€“ PublishedEventsType definition
139 Table 111 โ€“ DataSetFolderType definition
146 9.1.5 Connection Model
147 Figure 40 โ€“ PubSubConnectionType overview
Table 112 โ€“ PubSubConnectionType definition
150 9.1.6 Group Model
Figure 41 โ€“ PubSubGroupType overview
Table 113 โ€“ ConnectionTransportType definition
151 Table 114 โ€“ PubSubGroupType definition
152 Table 115 โ€“ WriterGroupType definition
154 Table 116 โ€“ HasDataSetWriter ReferenceType
Table 117 โ€“ WriterGroupTransportType definition
155 Table 118 โ€“ WriterGroupMessageType definition
Table 119 โ€“ ReaderGroupType definition
157 Table 120 โ€“ HasDataSetReader ReferenceType
Table 121 โ€“ ReaderGroupTransportType definition
Table 122 โ€“ ReaderGroupMessageType Definition
158 9.1.7 DataSetWriter Model
Figure 42 โ€“ DataSet Writer Model Overview
Table 123 โ€“ DataSetWriterType definition
159 Table 124 โ€“ DataSetWriterTransportType definition
Table 125 โ€“ DataSetWriterMessageType definition
160 9.1.8 DataSetReader Model
Figure 43 โ€“ DataSet Reader Model overview
161 Table 126 โ€“ DataSetReaderType definition
162 Table 127 โ€“ DataSetReaderTransportType definition
163 Table 128 โ€“ DataSetReaderMessageType definition
165 9.1.9 Subscribed DataSet Model
Table 129 โ€“ SubscribedDataSetType definition
Table 130 โ€“ TargetVariablesType definition
167 Table 131 โ€“ SubscribedDataSetMirrorType definition
168 9.1.10 PubSub Status Object
Table 132 โ€“ PubSubStatusType definition
169 9.1.11 PubSub Diagnostics Objects
Table 133 โ€“ Status Object definition
170 Figure 44 โ€“ PubSub Diagnostics overview
Figure 45 โ€“ PubSubDiagnosticsCounterType
171 Table 134 โ€“ PubSubDiagnosticsType
Table 135 โ€“ Counters for PubSubDiagnosticsType
172 Table 136 โ€“ DiagnosticsLevel Values
173 Table 137 โ€“ PubSubDiagnosticsCounterType
Table 138 โ€“ PubSubDiagnosticsCounterClassification Values
174 Table 139 โ€“ PubSubDiagnosticsRootType
Table 140 โ€“ LiveValues for PubSubDiagnosticsRootType
Table 141 โ€“ PubSubDiagnosticsConnectionType
175 Table 142 โ€“ LiveValues for PubSubDiagnosticsConnectionType
Table 143 โ€“ PubSubDiagnosticsWriterGroupType
Table 144 โ€“ Counters for PubSubDiagnosticsWriterGroupType
Table 145 โ€“ LiveValues for PubSubDiagnosticsWriterGroupType
176 Table 146 โ€“ PubSubDiagnosticsReaderGroupType
Table 147 โ€“ Counters for PubSubDiagnosticsReaderGroupType
Table 148 โ€“ LiveValues for PubSubDiagnosticsReaderGroupType
177 Table 149 โ€“ PubSubDiagnosticsDataSetWriterType
Table 150 โ€“ Counters for PubSubDiagnosticsDataSetWriterType
Table 151 โ€“ LiveValues for PubSubDiagnosticsDataSetWriterType
Table 152 โ€“ PubSubDiagnosticsDataSetReaderType
178 9.1.12 PubSub Status Events
Table 153 โ€“ Counters for PubSubDiagnosticsDataSetReaderType
Table 154 โ€“ LiveValues for PubSubDiagnosticsDataSetReaderType
Table 155 โ€“ PubSubStatusEventType definition
179 Table 156 โ€“ PubSubTransportLimitsExceedEventType definition
Table 157 โ€“ PubSubCommunicationFailureEventType definition
180 9.2 Message Mapping Configuration Model
9.2.1 UADP Message Mapping
Table 158 โ€“ UadpWriterGroupMessageType definition
181 Table 159 โ€“ UadpDataSetWriterMessageType definition
Table 160 โ€“ UadpDataSetReaderMessageType definition
182 9.2.2 JSON Message Mapping
Table 161 โ€“ JsonWriterGroupMessageType Definition
Table 162 โ€“ JsonDataSetWriterMessageType definition
183 9.3 Transport Protocol Mapping Configuration Model
9.3.1 Datagram Transport Protocol Mapping
Table 163 โ€“ JsonDataSetReaderMessageType definition
Table 164 โ€“ DatagramConnectionTransportType definition
Table 165 โ€“ DatagramWriterGroupTransportType definition
184 9.3.2 Broker Transport Protocol Mapping
Table 166 โ€“ BrokerConnectionTransportType definition
Table 167 โ€“ BrokerWriterGroupTransportType definition
185 Table 168 โ€“ BrokerDataSetWriterTransportType definition
Table 169 โ€“ Broker Writer well-known extension field names
186 Table 170 โ€“ BrokerDataSetReaderTransportType definition
187 Annex A (normative)Common types
A.1 DataType Schema Header structures
A.1.1 DataTypeSchemaHeader
Table A.1 โ€“ DataTypeSchemaHeader structure
Table A.2 โ€“ DataTypeSchemaHeader definition
188 A.1.2 DataTypeDescription
A.1.3 StructureDescription
Table A.3 โ€“ DataTypeDescription structure
Table A.4 โ€“ DataTypeDescription definition
Table A.5 โ€“ StructureDescription structure
Table A.6 โ€“ StructureDescription definition
189 A.1.4 EnumDescription
A.1.5 SimpleTypeDescription
A.2 UABinaryFileDataType
Table A.7 โ€“ EnumDescription Structure
Table A.8 โ€“ EnumDescription definition
Table A.9 โ€“ SimpleTypeDescription structure
190 A.3 NetworkAddress Model
A.3.1 NetworkAddressType
Table A.10 โ€“ UABinaryFileDataType structure
Table A.11 โ€“ UABinaryFileDataType definition
Table A.12 โ€“ NetworkAddressType definition
191 A.3.2 NetworkAddressUrlType
Table A.13 โ€“ NetworkAddressUrlType definition
192 Annex B (informative)Client Server vs. Publish Subscribe
B.1 Overview
B.2 Client Server Subscriptions
193 B.3 Publish-Subscribe
Figure B.1 โ€“ Subscriptions in OPC UA Client Server Model
194 B.4 Synergy of models
Figure B.2 โ€“ Publish Subscribe Model Overview

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