IEC 61158-4-2:2019
(Main)Industrial communication networks - Fieldbus specifications - Part 4-2: Data-link layer protocol specification - Type 2 elements
Industrial communication networks - Fieldbus specifications - Part 4-2: Data-link layer protocol specification - Type 2 elements
IEC 61158-4-2:2019 specifies procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed data-link service provider and the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units. This fourth edition cancels and replaces the third edition published in 2014 and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
•clarifications of ControlNet object in 7.2;
•extensions and clarifications of TCP/IP interface object in 7.5;
•extensions and clarifications of Ethernet Link object in 7.6;
•clarifications of DeviceNet object in 7.7;
•extensions and clarifications of CCO object in 7.8;
•extensions and clarifications of DLR object in 7.9;
•extensions and clarifications of Port object in 7.11;
•addition of PRP/HSR Protocol and PRP/HSR Nodes Table objects in 7.12 and 7.13;
•extensions and clarifications of DLR protocol in Clause 10;
•addition of PRP/HSR protocol mapping in Clause 11;
•update of indicator behaviour in A.2.2 and A.2.4;
•miscellaneous editorial corrections.
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4- 2: Spécification du protocole de la couche liaison de données - Éléments de type 2
La couche de liaison de données assure les communications de messagerie à contrainte de temps de base entre les appareils d'un environnement d'automatisation.
Ce protocole offre des opportunités de communication séquentielle et synchrone cyclique à toutes les entités de liaison de données participantes. Un accès planifié de premier plan est proposé à toutes les activités à contrainte de temps, un accès non planifié l'étant aux activités moins critiques.
Des transferts déterministes et synchronisés peuvent être assurés à des intervalles cycliques allant jusqu’à 1 ms et des appareils distants de 25 km. Cette performance peut être adaptée de manière dynamique et en ligne en reconfigurant les paramètres de la liaison locale sans interrompre le fonctionnement normal. De la même manière, des connexions DL et de nouveaux appareils peuvent être ajoutés ou retirés pendant le fonctionnement normal.
Ce protocole offre la possibilité de maintenir la synchronisation d'horloge d'une liaison étendue supérieure à 10 μs.
Ce protocole permet d'optimiser chaque opportunité d'accès en concaténant plusieurs DLSDU et DLPCI associés en une seule DLPDU, améliorant le transfert de données des entités de liaison de données qui émettent activement plusieurs flux de données.
La taille maximale du système est un nombre illimité de liaisons de 99 nœuds, comportant chacune 255 adresses DLSAP. Chaque liaison comporte un maximum de 224 homologues connexes et DLCEP d'éditeur.
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IEC 61158-4-2 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
All rights reserved. Unless otherwise specified, 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
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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.
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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 publications issued since 2002. Some entries have been
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IEC 61158-4-2 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6772-1
– 2 – IEC 61158-4-2:2019 © IEC 2019
CONTENTS
FOREWORD . 15
INTRODUCTION . 17
1 Scope . 19
1.1 General . 19
1.2 Specifications . 19
1.3 Procedures . 19
1.4 Applicability . 20
1.5 Conformance . 20
2 Normative references . 20
3 Terms, definitions, symbols, abbreviated terms and conventions . 22
3.1 Reference model terms and definitions . 22
3.2 Service convention terms and definitions . 24
3.3 Common terms and definitions . 24
3.4 Additional Type 2 definitions . 25
3.5 Type 2 symbols and abbreviated terms . 33
3.6 Conventions for station management objects . 34
4 Overview of the data-link protocol . 35
4.1 General . 35
4.1.1 DLL architecture . 35
4.1.2 Access control machine (ACM) and scheduling support functions . 36
4.1.3 Connection-mode, connectionless-mode data transfer and DL service . 37
4.2 Services provided by the DL . 37
4.2.1 Overview . 37
4.2.2 QoS . 37
4.3 Structure and definition of DL-addresses . 38
4.3.1 General . 38
4.3.2 MAC ID address . 38
4.3.3 Generic tag address . 39
4.3.4 Fixed tag address . 39
4.4 Services assumed from the PhL . 40
4.4.1 General requirements . 40
4.4.2 Data encoding rules . 41
4.4.3 DLL to PhL interface . 41
4.5 Functional classes . 43
5 General structure and encoding of PhIDUs and DLPDUs and related elements of
procedure . 43
5.1 Overview . 43
5.2 Media access procedure . 43
5.3 DLPDU structure and encoding . 47
5.3.1 General . 47
5.3.2 DLPDU components . 47
5.3.3 Preamble . 47
5.3.4 Start and end delimiters . 47
5.3.5 DLPDU octets and ordering . 47
5.3.6 Source MAC ID . 48
5.3.7 Lpackets field . 48
5.3.8 Frame check sequence (FCS). 48
5.3.9 Null DLPDU . 51
5.3.10 Abort DLPDU . 51
5.4 Lpacket components . 51
5.4.1 General Lpacket structure . 51
5.4.2 Size . 51
5.4.3 Control . 52
5.4.4 Generic tag Lpackets . 52
5.4.5 Fixed tag Lpackets . 53
5.5 DLPDU procedures . 53
5.5.1 General . 53
5.5.2 Sending scheduled DLPDUs . 54
5.5.3 Sending unscheduled DLPDUs . 54
5.5.4 Receiving DLPDUs . 54
5.6 Summary of DLL support services and objects . 54
6 Specific DLPDU structure, encoding and procedures . 56
6.1 Modeling language . 56
6.1.1 State machine description . 56
6.1.2 Use of DLL- prefix . 57
6.1.3 Data types . 57
6.2 DLS user services . 58
6.2.1 General . 58
6.2.2 Connected mode and connectionless mode transfer service . 58
6.2.3 Queue maintenance service . 60
6.2.4 Tag filter service . 60
6.2.5 Link synchronization service . 61
6.2.6 Synchronized parameter change service . 61
6.2.7 Event reports service . 62
6.2.8 Bad FCS service . 63
6.2.9 Current moderator service . 63
6.2.10 Power up and online services . 64
6.2.11 Enable moderator service . 64
6.2.12 Listen only service . 64
6.3 Generic tag Lpacket . 64
6.3.1 General . 64
6.3.2 Structure of the generic-tag Lpacket . 65
6.3.3 Sending and receiving the generic-tag Lpacket . 65
6.4 Moderator Lpacket . 65
6.4.1 General . 65
6.4.2 Structure of the moderator Lpacket . 65
6.4.3 Sending and receiving the moderator Lpacket . 66
6.5 Time distribution Lpacket . 67
6.5.1 General . 67
6.5.2 Structure of the time distribution Lpacket . 67
6.5.3 Sending and receiving the time distribution Lpacket . 69
6.6 UCMM Lpacket . 69
6.6.1 General . 69
6.6.2 Structure of the UCMM Lpacket . 69
6.6.3 Sending and receiving the UCMM Lpacket . 69
– 4 – IEC 61158-4-2:2019 © IEC 2019
6.7 Keeper UCMM Lpacket . 69
6.7.1 General .
...
IEC 61158-4-2 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-2: Spécification du protocole de la couche liaison de données –
Éléments de type 2
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
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.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
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IEC 61158-4-2 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-2: Spécification du protocole de la couche liaison de données –
Éléments de type 2
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-9134-4
– 2 – IEC 61158-4-2:2019 © IEC 2019
CONTENTS
FOREWORD . 15
INTRODUCTION . 17
1 Scope . 19
1.1 General . 19
1.2 Specifications . 19
1.3 Procedures . 19
1.4 Applicability . 20
1.5 Conformance . 20
2 Normative references . 20
3 Terms, definitions, symbols, abbreviated terms and conventions . 22
3.1 Reference model terms and definitions . 22
3.2 Service convention terms and definitions . 24
3.3 Common terms and definitions . 24
3.4 Additional Type 2 definitions . 25
3.5 Type 2 symbols and abbreviated terms . 33
3.6 Conventions for station management objects . 34
4 Overview of the data-link protocol . 35
4.1 General . 35
4.1.1 DLL architecture . 35
4.1.2 Access control machine (ACM) and scheduling support functions . 36
4.1.3 Connection-mode, connectionless-mode data transfer and DL service . 37
4.2 Services provided by the DL . 37
4.2.1 Overview . 37
4.2.2 QoS . 37
4.3 Structure and definition of DL-addresses . 38
4.3.1 General . 38
4.3.2 MAC ID address . 38
4.3.3 Generic tag address . 39
4.3.4 Fixed tag address . 39
4.4 Services assumed from the PhL . 40
4.4.1 General requirements . 40
4.4.2 Data encoding rules . 41
4.4.3 DLL to PhL interface . 41
4.5 Functional classes . 43
5 General structure and encoding of PhIDUs and DLPDUs and related elements of
procedure . 43
5.1 Overview . 43
5.2 Media access procedure . 43
5.3 DLPDU structure and encoding . 47
5.3.1 General . 47
5.3.2 DLPDU components . 47
5.3.3 Preamble . 47
5.3.4 Start and end delimiters . 47
5.3.5 DLPDU octets and ordering . 47
5.3.6 Source MAC ID . 48
5.3.7 Lpackets field . 48
5.3.8 Frame check sequence (FCS). 48
5.3.9 Null DLPDU . 51
5.3.10 Abort DLPDU . 51
5.4 Lpacket components . 51
5.4.1 General Lpacket structure . 51
5.4.2 Size . 51
5.4.3 Control . 52
5.4.4 Generic tag Lpackets . 52
5.4.5 Fixed tag Lpackets . 53
5.5 DLPDU procedures . 53
5.5.1 General . 53
5.5.2 Sending scheduled DLPDUs . 54
5.5.3 Sending unscheduled DLPDUs . 54
5.5.4 Receiving DLPDUs . 54
5.6 Summary of DLL support services and objects . 54
6 Specific DLPDU structure, encoding and procedures . 56
6.1 Modeling language . 56
6.1.1 State machine description . 56
6.1.2 Use of DLL- prefix . 57
6.1.3 Data types . 57
6.2 DLS user services . 58
6.2.1 General . 58
6.2.2 Connected mode and connectionless mode transfer service . 58
6.2.3 Queue maintenance service . 60
6.2.4 Tag filter service . 60
6.2.5 Link synchronization service .
...
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