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IEC 62541-4
Edition 3.0 2020-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
OPC unified architecture –
Part 4: Services
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IEC 62541-4
Edition 3.0 2020-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
OPC unified architecture –
Part 4: Services
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-8664-7
– 2 – IEC 62541-4:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 13
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 . 18
3.3 Conventions for Service definitions . 18
4 Overview . 20
4.1 Service Set model . 20
4.2 Request/response Service procedures . 23
5 Service Sets . 23
5.1 General . 23
5.2 Service request and response header . 24
5.3 Service results . 24
5.4 Discovery Service Set . 25
5.4.1 Overview . 25
5.4.2 FindServers . 27
5.4.3 FindServersOnNetwork . 28
5.4.4 GetEndpoints . 30
5.4.5 RegisterServer . 32
5.4.6 RegisterServer2 . 36
5.5 SecureChannel Service Set . 38
5.5.1 Overview . 38
5.5.2 OpenSecureChannel. 39
5.5.3 CloseSecureChannel . 43
5.6 Session Service Set . 44
5.6.1 Overview . 44
5.6.2 CreateSession . 44
5.6.3 ActivateSession . 49
5.6.4 CloseSession . 52
5.6.5 Cancel . 53
5.7 NodeManagement Service Set . 54
5.7.1 Overview . 54
5.7.2 AddNodes . 54
5.7.3 AddReferences . 56
5.7.4 DeleteNodes . 57
5.7.5 DeleteReferences . 59
5.8 View Service Set . 60
5.8.1 Overview . 60
5.8.2 Browse . 60
5.8.3 BrowseNext . 63
5.8.4 TranslateBrowsePathsToNodeIds . 65
5.8.5 RegisterNodes . 67
5.8.6 UnregisterNodes . 68
5.9 Query Service Set . 69
5.9.1 Overview . 69
5.9.2 Querying Views . 69
5.9.3 QueryFirst . 70
5.9.4 QueryNext . 73
5.10 Attribute Service Set . 74
5.10.1 Overview . 74
5.10.2 Read . 75
5.10.3 HistoryRead . 76
5.10.4 Write. 79
5.10.5 HistoryUpdate . 82
5.11 Method Service Set . 84
5.11.1 Overview . 84
5.11.2 Call . 84
5.12 MonitoredItem Service Set . 87
5.12.1 MonitoredItem model . 87
5.12.2 CreateMonitoredItems . 93
5.12.3 ModifyMonitoredItems . 95
5.12.4 SetMonitoringMode . 97
5.12.5 SetTriggering . 98
5.12.6 DeleteMonitoredItems . 100
5.13 Subscription Service Set . 101
5.13.1 Subscription model . 101
5.13.2 CreateSubscription . 110
5.13.3 ModifySubscription . 111
5.13.4 SetPublishingMode . 113
5.13.5 Publish . 114
5.13.6 Republish . 116
5.13.7 TransferSubscriptions . 117
5.13.8 DeleteSubscriptions . 119
6 Service behaviours . 120
6.1 Security . 120
6.1.1 Overview . 120
6.1.2 Obtaining and installing an Application Instance Certificate . 120
6.1.3 Determining if a Certificate is trusted . 121
6.1.4 Creating a SecureChannel . 124
6.1.5 Creating a Session . 126
6.1.6 Impersonating a User . 127
6.2 Authorization Services . 127
6.2.1 Overview . 127
6.2.2 Indirect handshake with an Identity Provider . 128
6.2.3 Direct handshake with an Identity Provider . 128
6.3 Session-less Service invocation . 129
6.3.1 Description . 129
6.3.2 Parameters . 130
6.3.3 Service results . 131
6.4 Software Certificates . 131
6.5 Auditing . 133
6.5.1 Overview . 133
6.5.2 General audit logs . 133
6.5.3 General audit Events . 133
– 4 – IEC 62541-
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