IEC 61158-4:2000

INTERNATIONAL
IEC
STANDARD
61158-4
Second edition
2000-01
Digital data communications for
measurement and control –
Fieldbus for use in industrial control systems –
Part 4:
Data Link protocol specification

Reference number
Numbering
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Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD 61158-4
Second edition
2000-01
Digital data communications for
measurement and control –
Fieldbus for use in industrial control systems –
Part 4:
Data Link protocol specification

© IEC 2000 – Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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For price, see current catalogue

– 2 – 61158-4 © IEC:2000(E)
CONTENTS
Page
FOREWORD .28

INTRODUCTION . 30

Clause
1 Scope and object . 31

1.1 Specifications . 32

1.2 Procedures . 34
1.3 Applicability. 34
1.4 Conformance . 34
2 Normative references . 35
2.1 Common normative references. 35
2.2 Type 1: additional normative references . 35
2.3 Type 2: additional normative references . 36
2.4 Type 3: additional normative references . 36
2.5 Type 4: additional normative references . 36
2.6 Type 5: additional normative references . 36
2.7 Type 6: additional normative references . 36
2.8 Type 7: additional normative references . 36
2.9 Type 8: additional normative references . 37
3 Definitions. 38
3.1 Reference model definitions . 38
3.2 Service convention definitions . 40
3.3 Common terms and definitions . 41
3.4 Type 1: additional terms and definitions. 42
3.5 Type 2: additional terms and definitions. 51
3.6 Type 3: additional terms and definitions. 58
3.7 Type 4: additional terms and definitions. 60
3.8 Type 5: additional terms and definitions. 61
3.9 Type 6: additional terms and definitions. 61
3.10 Type 7: additional terms and definitions. 71
3.11 Type 8: additional terms and definitions. 74
4 Symbols and abbreviations. 75

4.1 Common symbols and abbreviations . 75
4.2 Type 1: additional symbols and abbreviations . 75
4.3 Type 2: additional symbols and abbreviations . 79
4.4 Type 3: additional symbols and abbreviations . 80
4.5 Type 4: additional symbols and abbreviations . 84
4.6 Type 5: additional symbols and abbreviations . 84
4.7 Type 6: additional symbols and abbreviations . 84
4.8 Type 7: additional symbols and abbreviations . 86
4.9 Type 8: additional symbols and abbreviations . 87
5 DL-protocol elements common to multiple DL-protocl Types . 90
5.1 Frame check sequence . 90
6 Type 1: Overview of the DL-protocol. 94
6.1 Three-level model of the DLL . 94

61158-4 © IEC:2000(E) – 3 –
6.2 Service provided by the DLL. 97

6.3 Structure and definition of DL-addresses . 104

6.4 Service assumed from the PhL. 116

6.5 Functions of the DLL . 119

6.6 Functional classes . 121

6.7 Local parameters, variables, counters, timers and queues . 123

7 Type 1: General structure and encoding of PhIDUs and DLPDUs, and related elements

of procedure. 138

7.1 PhIDU structure and encoding. 138

7.2 Common DLPDU structure, encoding and elements of procedure . 139

8 Type 1: DLPDU-specific structure, encoding and elements of procedure. 148
8.1 Establish Connection (EC) DLPDU . 150
8.2 Disconnect Connection (DC) DLPDU . 152
8.3 Reset Connection (RC) DLPDU . 155
8.4 Compel Acknowledgement (CA) DLPDU. 157
8.5 Compel Data (CD) DLPDU . 164
8.6 Exchange Data (ED) DLPDU . 172
8.7 Data (DT) DLPDU . 182
8.8 Status Response (SR) DLPDU . 191
8.9 Compel Time (CT) DLPDU . 194
8.10 Time Distribution (TD) DLPDU. 196
8.11 Round-Trip-Delay Query (RQ) DLPDU. 198
8.12 Round-Trip-Delay Reply (RR) DLPDU. 200
8.13 Probe Node DL-address (PN) DLPDU. 202
8.14 Probe Response (PR) DLPDU . 205
8.15 Pass Token (PT) DLPDU. 206
8.16 Execute Sequence (ES) DLPDU . 216
8.17 Return Token (RT) DLPDU. 224
8.18 Request Interval (RI) DLPDU. 225
8.19 Claim LAS (CL) DLPDU. 226
8.20 Transfer LAS (TL) DLPDU. 228
8.21 Wakeup (WK) DLPDU. 232
8.22 Idle (IDLE) DLPDU . 233
8.23 Spare DLPDUs. 235
8.24 Reserved (not to be used) DLPDUs . 236

9 Type 1: DLPDU-parameter structure and encoding . 238
9.1 Structure and encoding of EC-PARAMETERS . 238
9.2 Structure and encoding of DC-PARAMETERS . 243
9.3 Structure and encoding of RC-PARAMETERS . 244
9.4 Structure and encoding of SD-Parameters. 246
9.5 Structure and encoding of SR-parameters . 254
9.6 Structure and encoding of TD-parameters . 254
9.7 Structure and encoding of RQ-parameters. 257
9.8 Structure and encoding of RR-parameters . 258
9.9 Structure and encoding of PN-parameters . 259
9.10 Structure and encoding of DD-parameters . 260
10 Type 1: DL-service elements of procedure. 262
10.1 Operation of the DL(SAP)-address, buffer and queue management services. 262
10.2 Operation of the connection-mode services . 266

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10.3 Operation of the connectionless-mode services . 315

10.4 Operation of the scheduling guidance services . 329

11 Type 1: DL-support subprotocol. 341

11.1 Scope . 341

11.2 Overview of LAS operation . 341

11.3 DL-support subprotocol definition . 342

11.4 Elements of Procedures for receiving SPDUs . 379

12 Type 1: Other DLE elements of procedure . 381

12.1 DLE initialization . 381

12.2 LAS behavior and operation . 386
12.3 DL-support operation. 395
12.4 DL-bridge elements of procedure and bridge sub-protocol . 401
...