IEC 61158-3:2003

INTERNATIONAL IEC
STANDARD
61158-3
Third edition
2003-05
Digital data communications
for measurement and control –
Fieldbus for use in industrial
control systems –
Part 3:
Data link service definition
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INTERNATIONAL IEC
STANDARD 61158-3
Third edition
2003-05
Digital data communications
for measurement and control –
Fieldbus for use in industrial
control systems –
Part 3:
Data link service definition
© IEC 2003 – Copyright - all rights reserved
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– 2 – 61158-3  IEC:2003(E)
CONTENTS
FOREWORD.13

0 Introduction .15

0.1 General .15

0.2 Nomenclature for references within this standard .15

1 Scope and object .16

1.1 Overview .16

1.2 Specifications .17

1.3 Conformance.17

1.4 Scope of type-specific clauses and subclauses .17
2 Normative references.18
3 Terms and definitions .19
3.1 Reference model terms and definitions .19
3.2 Service convention terms and definitions .20
3.3 Common Data Link Service terms and definitions.21
3.4 Type 1: Additional Data Link Service terms and definitions .23
3.5 Type 2: Additional Data Link Service terms and definitions .25
3.6 Type 3: Additional Data Link Service terms and definitions .27
3.7 Type 4: Additional Data Link Service terms and definitions .29
3.8 Type 6: Additional Data Link Service terms and definitions .31
3.9 Type 7: Additional Data Link Service terms and definitions .39
3.10 Type 8: Additional Data Link Service terms and definitions .41
4 Symbols and abbreviations .42
4.1 Common symbols and abbreviations .42
4.2 Type 1: Additional symbols and abbreviations .42
4.3 Type 2: Additional symbols and abbreviations .42
4.4 Type 3: Additional symbols and abbreviations .43
4.5 Type 4: Additional symbols and abbreviations .45
4.6 Type 6: Additional symbols and abbreviations .45
4.7 Type 7: Additional symbols and abbreviations .46
4.8 Type 8: Additional symbols and abbreviations .46
5 Conventions .47

5.1 General conventions .47
5.2 Type 1: Additional conventions.48
5.3 Type 2: Additional conventions.48
5.4 Type 3: Additional conventions.48
5.5 Type 4: Additional conventions.49
5.6 Type 6: Additional conventions.49
5.7 Type 7: Additional conventions.49
5.8 Type 8: Additional conventions.49
6 Type 1: Overview of the Data Link Service .50
6.1 General .50
6.2 Types and classes of Data Link Service .53
6.3 Quality of Service (QoS) attributes common to multiple types of Data Link
Service.53

61158-3  IEC:2003(E) – 3 –
7 Type 1: DL(SAP)-address, queue and buffer management Data Link Service .59

7.1 Facilities of the DL(SAP)-address, queue and buffer management Data Link

Service.59

7.2 Model of the DL(SAP)-address, queue and buffer management Data Link

Service.59

7.3 Sequence of primitives at one DLSAP .59

7.4 DL(SAP)-address, queue and buffer management facilities .61

8 Type 1: Connection-mode Data Link Service .76

8.1 Facilities of the connection-mode Data Link Service.76

8.2 Model of the connection-mode Data Link Service .77

8.3 Quality of connection-mode service.83
8.4 Sequence of primitives .89
8.5 Connection establishment phase. 100
8.6 Connection release phase. 107
8.7 Data transfer phase . 113
9 Type 1: Connectionless-mode Data Link Service . 125
9.1 Facilities of the connectionless-mode Data Link Service. 125
9.2 Model of the connectionless-mode Data Link Service . 125
9.3 Quality of connectionless-mode service . 127
9.4 Sequence of primitives . 128
9.5 Connectionless-mode functions . 130
10 Type 1: Time and scheduling guidance Data Link Service. 141
10.1 Facilities and classes of the time and scheduling guidance Data Link Service. 141
10.2 Model of the time and scheduling guidance Data Link Service . 142
10.3 Quality of scheduling guidance service. 142
10.4 Sequence of primitives at one DLE . 142
10.5 Scheduling guidance functions. 143
11 Types 1 and 4: DL-management Service . 154
11.1 Scope and inheritance . 154
11.2 Facilities of the DL-management service. 154
11.3 Model of the DL-management service . 154
11.4 Constraints on sequence of primitives. 154
11.5 Set . 155
11.6 Get. 156

11.7 Action. 156
11.8 Event. 157
12 Type 2: Connection-mode and connectionless-mode Data Link Service . 159
12.1 Overview . 159
12.2 Facilities of the Data Link Service . 162
12.3 Model of the Data Link Service . 163
12.4 Sequence of primitives . 165
12.5 Connection-mode data transfer . 167
12.6 Connectionless-mode data transfer. 169
12.7 Queue maintenance. 172
12.8 Tag filter. 174
13 Type 2: DL-management Services. 176
13.1 Sequence of primitives . 176

– 4 – 61158-3  IEC:2003(E)
13.2 Link synchronization . 176

13.3 Synchronized parameter change . 177

13.4 Event reports. 180

13.5 Bad FCS. 182

13.6 Current moderator . 182

13.7 Enable moderator . 183

13.8 Power-up and online . 184

13.9 Listen only. 185

13.10 Time distribution. 186

14 Type 3: Connectionless-mode Data Link Service . 188
14.1 General . 188
14.2 Model of the connectionless-mode Data Link Service . 188
14.3 Sequence of primitives . 190
14.4 Detailed description of DL services . 194
15 Type 3: DL-management Service . 214
15.1 General . 214
15.2 Facilities of the DLMS. 214
15.3 Services of the DL-management . 214
15.4 Overview of interactions. 215
15.5 Detailed specification of services and interactions. 217
16 Type 4: Data Link Service and concepts. 239
16.1 Overview . 239
16.2 Types and classes of Data Link Service . 240
16.3 Functional classes . 240
16.4 Facilities of the connectionless-mode Data Link Service. 240
16.5 Model of the connectionless-mode Data Link Service . 240
16.6 Sequence of primitives . 241
16.7 Connectionless-mode data transfer functions . 243
17 Type 6: Data Link Service and concepts. 246
17.1 Fundamental concepts. 246
17.2 Quality of service (QoS). 258
17.3 Connection mode services . 260
17.4 Connectionless management service . 267

17.5 Real-time services . 272
18 Type 7: Data Link services and concepts . 275
18.1 Field of application, object . 275
18.2 General description of services . 275
18.3 Sequences of primitives. 280
18.4 Buffer writing . 282
18.5 Buffer reading. 283
18.6 Buffer transfer . 284
18.7 Explicit request for buffer transfer . 286
18.8 Unacknowledged message transfer. 290
18.9 Acknowledged message transfer. 292

61158-3  IEC:2003(E) – 5 –
19 Type 8: Data Link Service and concepts. 295

19.1 Overview . 295

19.2 Sequence of primitives . 296

19.3 Connection-mode Data Link services . 299

20 Type 8: DL-management Service . 303

20.1 Scope. 303

20.2 Facilities of the DL-management service. 303

20.3 Overview of services. 303

20.4 Overview of interactions. 304

20.5 Detailed specification of services and interactions. 306
Figure 1 – Relationship of IEC 61158-3 to other fieldbus layers and to users of the Fieldbus
Data Link Service.15
Figure 2 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses .22
Figure 3 – Relationships of DLCEPs and DLCEP-addresses to DLSAPs, DLSAP-addresses
and group DL-addresses .24
Figure 4 – Example of paths, links, bridges, and the extended link.51
Figure 5 – Types of DL-timeliness In terms of elapsed DL-time and events at the assessing
DLCEP.57
Figure 6 – Sequence of primitives for the DL(SAP)-address, queue and buffer management
DLS .61
Figure 7 – Supported methods of data management for transmission and delivery .62
Figure 8 – Peer-to-peer and multi-peer DLCs and their DLCEPs .76
Figure 9 – OSI abstract queue model of a peer DLC between a pair of DLS-users .78
Figure 10 – OSI abstract queue model of a multi-peer DLC between a publishing DLS-user
and a set of subscribing DLS-users .81
Figure 11 – Summary of DL-connection-mode service primitive time-sequence diagrams for
peer DLCs (portion 1).93
Figure 12 – Summary of DL-connection-mode service primitive time-sequence diagrams for
peer DLCs (portion 2).94
Figure 13 – Summary of DL-connection-mode service primitive time-sequence diagrams for
publishers of a multi-peer DLC (portion 1) .95
Figure 14 – Summary of DL-connection-mode service primitive time-sequence diagrams for
publishers of a multi-peer DLC (portion 2) .96
Figure 15 – Summary of additional DL-connection-mode service primitive time-sequence

diagrams for a multi-peer DLC subscriber where the diagrams differ from the corresponding
ones for a publisher (portion 1).97
Figure 16 – Summary of additional DL-connection-mode service primitive time-sequence
diagrams for a multi-peer DLC subscriber where the diagrams differ from the corresponding ones
for a publisher (portion 2) .98
Figure 17 – State transition diagram for sequences of DL-connection-mode service primitives
at a DLCEP.99
Figure 18 – Peer DLC/DLCEP establishment initiated by a single DLS-user . 105
Figure 19 – Multi-peer DLC/DLCEP establishment initiated by the publishing DLS-user. 105
Figure 20 – Multi-peer DLC/DLCEP establishment initiated by a subscribing DLS-user. 106
Figure 21 – Multi-peer DLC/DLCEP establishment using known DLCEP addresses initiated
first by the publishing DLS-user. 106
Figure 22 – Multi-peer DLC/DLCEP establishment using known DLCEP addresses initiated
first by one or more subscribing DLS-users . 106

– 6 – 61158-3  IEC:2003(E)
Figure 23 – Peer DLC/DLCEP establishment initiated simultaneously by both peer

DLS-users, resulting in a merged DLC. 106

Figure 24 – Multi-peer DLC/DLCEP establishment initiated simultaneously by both

publishing and subscribing DLS-users, resulting in a merged DLC . 107

Figure 25 – Peer DLS-user invocation . 109

Figure 26 – Publishing DLS-user invocation. 109

Figure 27 – Subscribing DLS-user invocation. 110

Figure 28 – Simultaneous invocation by both DLS-users . 110

Figure 29 – Peer DLS-provider invocation. 110

Figure 30 – Publishing DLS-provider invocation . 110
Figure 31 – Subscribing DLS-provider invocation. 110
Figure 32 – Simultaneous peer DLS-user and DLS-provider invocations . 110
Figure 33 – Simultaneous publishing DLS-user and DLS-provider invocations. 110
Figure 34 – Simultaneous subscribing DLS-user and DLS-provider invocations. 110
Figure 35 – Sequence of primitives in a peer DLS-user rejection of a DLC/DLCEP
establishment attempt . 111
Figure 36 – Sequence of primitives in a publishing DLS-user rejection of a DLC/DLCEP
establishment attempt . 111
Figure 37 – Sequence of primitives in a subscribing DLS-user rejection of a DLC/DLCEP
establishment attempt . 111
Figure 38 – Sequence of primitives in a DLS-provider rejection of a DLC/DLCEP establishment
attempt . 111
Figure 39 – Sequence of primitives in a DLS-user cancellation of a DLC/DLCEP establishment
attempt: both primitives are destroyed in the queue . 112
Figure 40 – Sequence of primitives in a DLS-user cancellation of a DLC/DLCEP establishment
attempt: DL-DISCONNECT indication arrives before DL-CONNECT response is sent. 112
Figure 41 – Sequence of primitives in a DLS-user cancellation of a DLC/DLCEP establishment
attempt: peer DL-DISCONNECT indication arrives after DL-CONNECT response is sent. 112
Figure 42 – Sequence of primitives in a DLS-user cancellation of a DLC/DLCEP establishment
attempt: publisher’s DL-DISCONNECT indication arrives after DL-CONNECT response is sent . 112
Figure 43 – Sequence of primitives in a DLS-user cancellation of a DLC/DLCEP
establishment attempt: subscriber’s DL-DISCONNECT request arrives after DL-CONNECT
request has been communicated to the publisher . 113
Figure 44 – Sequence of primitives for a CLASSICAL or DISORDERED peer-to-peer queue-to-
queue data transfer . 115
Figure 45 – Sequence of primitives for an ORDERED or UNORDERED peer-to-peer,
or an UNORDERED subscriber-to-publisher queue-to-queue data transfer . 115

Figure 46 – Sequence of primitives for a publisher-to-subscribers queue-to-queue
data transfer . 115
Figure 47 – Sequence of primitives for a failed queue-to-queue data transfer. 116
Figure 48 – Sequence of primitives for an ORDERED or UNORDERED peer to peer, or an
UNORDERED subscriber to publisher, buffer to buffer data transfer. 117
Figure 49 – Sequence of primitives for a publisher to subscribers buffer to buffer
data transfer . 117
Figure 50 – Sequence of primitives for an ORDERED or UNORDERED peer to peer,
or an UNORDERED subscriber to publisher, buffer to queue data transfer . 117
Figure 51 – Sequence of primitives for a publisher to subscribers buffer to queue
data transfer . 117
Figure 52 – Sequence of primitives in a peer DLS-user initiated Reset. 121
Figure 53 – Sequence of primitives in a publishing DLS-user initiated Reset . 121
Figure 54 – Sequence of primitives in a subscribing DLS-user initiated Reset . 121

61158-3  IEC:2003(E) – 7 –
Figure 55 – Sequence of primitives in a simultaneous peer DLS-users initiated Reset. 121

Figure 56 – Sequence of primitives in a simultaneous multi-peer DLS-users initiated Reset . 121

Figure 57 – Sequence of primitives in a peer DLS-provider initiated Reset . 122

Figure 58 – Sequence of primitives in a publishing DLS-provider initiated Reset . 122

Figure 59 – Sequence of primitives in a subscribing DLS-provider initiated Reset. 122

Figure 60 – Sequence of primitives in a simultaneous peer DLS-user and DLS-provider

initiated Reset. 122

Figure 61 – Sequence of primitives in a simultaneous publishing DLS-user and

DLS-provider initiated Reset. 122

Figure 62 – Sequence of primitives in a simultaneous subscribing DLS-user and
DLS-provider initiated Reset. 123
Figure 63 – Sequence of primitives for Subscriber Query. 124
Figure 64 – Model for a data-link connectionless-mode unitdata transmission or unitdata
exchange . 126
Figure 65 – Summary of DL-connectionless-mode service primitive time-sequence
diagrams. 129
Figure 66 – State transition diagram for sequences of connectionless-mode primitives
at one DLSAP . 130
Figure 67 – Sequence of primitives for a successful locally-acknowledged connection
less-mode unitdata transfer . 133
Figure 68 – Sequence of primitives for a successful remotely-acknowledged connection
less-mode unitdata transfer . 133
Figure 69 – Sequence of primitives for an unsuccessful connectionless-mode unitdata
transfer . 134
Figure 70 – Sequence of primitives for connectionless-mode unitdata exchange . 139
Figure 71 – Sequence of primitives for connectionless-mode listener query . 140
Figure 72 – Summary of time and scheduling-guidance service primitive time sequence
diagrams. 143
Figure 73 – Sequence of primitives for DL-time . 145
Figure 74 – Sequence of primitives for the Compel Service service. 147
Figure 75 – Sequence of primitives for the sequence scheduling services. 151
Figure 76 – Sequence of primitives for the DLM action service . 154
Figure 77 – NUT structure . 160
Figure 78 – Medium access during scheduled time . 160
Figure 79 – Medium access during unscheduled time . 161
Figure 80 – Queue model for the peer and multipoint DLS, DLSAPs and their DLCEPs . 163
Figure 81 – Queue model of a multipoint DLS between a sending DLS-user and one
or more receiving DLS-users . 164
Figure 82 – DLS primitive time-sequence diagram . 166
Figure 83 – State transition diagram for sequences of DLS primitives at one DLSAP. 167
Figure 84 – Sequence of primitives for a successful connection-mode transfer . 169
Figure 85 – Sequence of primitives for an unsuccessful connection-mode transfer. 169
Figure 86 – Sequence of primitives for a successful connectionless-mode transfer . 172
Figure 87 – Sequence of primitives for an unsuccessful connectionless-mode transfer. 172
Figure 88 – Sequence of primitives for a queue maintenance request . 174
Figure 89 – Sequence of primitives for a tag filter request. 175
Figure 90 – Sequence of primitives for a local link synchronization . 177
Figure 91 – Sequence of primitives for a DLM-get/set parameters request . 179
Figure 92 – Sequence of primitives for a DLM-tMinus change request. 179

– 8 – 61158-3  IEC:2003(E)
Figure 93 – Sequence of primitives for a DLM-event indication . 181

Figure 94 – Sequence of primitives for a DLM-bad-FCS indication . 182

Figure 95 – Sequence of primitives for a DLM-current-moderator indication . 183

Figure 96 – Sequence of primitives for a DLM-enable-moderator request. 184

Figure 97 – Sequence of primitives for a DLM-power-up indication. 185

Figure 98 – Sequence of primitives for a DLM-online request. 185

Figure 99 – Sequence of primitives for a DLM-listen-only request . 186

Figure 100 – SDA service. 191

Figure 101 – SDN service. 192

Figure 102 – SRD service. 192
Figure 103 – MSRD service. 193
Figure 104 – CS service . 193
Figure 105 – Reset, Set value, Get value, Ident (local), DLSAP status, DLSAP activate,
DLSAP activate responder, DLSAP activate subscriber and DLSAP deactivate services. 217
Figure 106 – Event service. 217
Figure 107 – Ident (remote) service. 217
Figure 108– Relationship of PhE, DLE and DLS-users . 239
Figure 109 – Confirmed and unconfirmed UNITDATA request time-sequence diagram . 242
Figure 110– Repeated confirmed request time-sequence diagram . 242
Figure 111 – State transition diagram for sequences of primitives at one DLSAP . 243
Figure 112 – EXAMPLE: TDMA bus operation using slots and channels. 246
Figure 113 – Fundamental concepts: slots, channels, scan classes, bus cycles and bus
synchronization . 247
Figure 114 – The operation of the SCAN channel-class and its DLS-user interactions . 248
Figure 115 – The operation of the ExSCAN channel-class and its DLS-user interaction. 248
Figure 116 – The operation of the GPA channel-class and its DLS-user interactions . 249
Figure 117 – The operation of the GPC channel-class and its DLS-user interactions . 250
Figure 118 – Relationships of DLSAPs, DLCEPs, DLEs and DLS-users, and allowed
classes of traffic from DLSAPs and DLCEPs . 253
Figure 119 – DLM-connectionless DL-addresses and node visible identification . 254
Figure 120 – DLM-connectionless DL-addressing operation . 254
Figure 121 – Peer and multipoint DLCs, their DLC-identifiers and related DLCEP types
and roles. 256
Figure 122 –Real and virtual topologies of an extended link . 257

Figure 123 – Operation of DLM-connectionless service and its user interactions . 267
Figure 124 – General form and encoding of DLM-connectionless DL-addresses. 270
Figure 125 – General description of medium allocation . 279
Figure 126 – Primitives associated with the buffer writing service . 282
Figure 127 – Primitives associated with the buffer reading service . 283
Figure 128 – Primitives associated with the buffer transfer service. 285
Figure 129 – Primitives associated with the specified explicit request for a buffer transfer. 287
Figure 130 – Primitives associated with the free explicit request for a buffer transfer . 289
Figure 131 – Primitives associated with the unacknowledged message transfer
request service . 290
Figure 132 – Primitives associated with the acknowledged message transfer
request service . 292
Figure 133 – Relationships of DLCEPs and DLCEP-addresses to default DLSAP . 296

61158-3  IEC:2003(E) – 9 –
Figure 134 – Sequence of primitives for the buffer data transfer . 298

Figure 135 – Normal data transfer service between a master and a slave . 299

Figure 136 – Sequence of primitives for a failed normal data transfer . 299

Figure 137 – Sequence of primitives for the reset service . 305

Figure 138 – Sequence of primitives for the event service. 305

Figure 139 – Sequence of primitives for the set value service . 305

Figure 140 – Sequence of primitives for the get value service . 305

Figure 141 – Sequence of primitives for the get current configuration service. 306

Figure 142 – Sequence of primitives for the get active configuration service . 306

Figure 143 – Sequence of primitives for the set active configuration service . 306
Table 1 – Summary of DL(SAP)-address, queue and buffer management primitives and
parameters .60
Table 2 – DL-buffer-and-queue-management create primitive and parameters .62
Table 3 – DL-buffer-and-queue-management delete primitive and parameters .65
Table 4 – DL(SAP)-address-management bind primitive and parameters .66
Table 5 – DL(SAP)-role constraints on DLSAPs, DLCEPs and other DLS Primitives .67
Table 6 – DL(SAP)-address-management unbind primitive and parameters .70
Table 7 – DL-buffer-management put primitive and parameters .71
Table 8 – DL-buffer-and-queue-management get primitive and parameters.73
Table 9 – Relationships between abstract queue model objects .79
Table 10 – Attributes and class requirements of DLCEP data delivery features .85
Table 11 – Summary of DL-connection-mode primitives and parameters (portion 1).91
Table 12 – Summary of DL-connection-mode primitives and parameters (portion 2).92
Table 13 – DLC / DLCEP establishment primitives and parameters (portion 1) . 101
Table 14 – DLC / DLCEP establishment primitives and parameters (portion 2) . 101
Table 15 – DLC / DLCEP release primitives and parameters. 108
Table 16 – Queue data transfer primitive and parameters . 113
Table 17 – Buffer sent primitive and parameter. 116
Table 18 – Buffer received primitive and parameter . 116
Table 19 – DLC/DLCEP reset primitives and parameters (portion 1) . 118
Table 20 – DLC/DLCEP reset primitives and parameters (portion 2) . 118
Table 21 – Subscriber query primitives and parameters . 123

Table 22 – Summary of DL-connectionless-mode primitives and parameters. 128
Table 23 – DL-connectionless-mode unitdata transfer primitives and parameters . 131
Table 24 – DL-connectionless-mode unitdata exchange primitive and parameters. 135
Table 25 – Listener query primitives and parameters . 139
Table 26 – Summary of DL-scheduling-guidance primitives and parameters. 142
Table 27 – DL-time primitive and parameters. 144
Table 28 – DL-scheduling-guidance Compel Service primitive and parameters. 145
Table 29 – DL-scheduling-guidance Schedule Sequence primitives and parameters . 148
Table 30 – DL-scheduling-guidance Cancel Schedule primitives and parameters . 152
Table 31 – DL-scheduling-guidance Subset Sequence primitives and parameters . 153
Table 32 – Summary of DL-management primitives and parameters
...