IEC 61158-4-22:2014

Industrial communication networks - Fieldbus specifications - Part 4-22: Data-link layer protocol specificationn - Type 22 elements

IEC 61158-4-22:2014 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 second edition cancels and replaces the first edition published in 2010 and constitutes a technical revision. The main changes are:
- Introduction of new topology scan PDUs;
- Bug fix of missing version field in some PDUs;
- Introduction of new Physical Link descriptors.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-22: Spécification du protocole de la couche liaison de données - Eléments de type 22

L'IEC 61158-4-22:2014 spécifie les procédures pour le transfert en temps utile de données et d'informations de commande d'une entité d'utilisateur de liaison de données vers une entité d'utilisateur homologue, et parmi les entités de liaison de données formant le fournisseur de service de liaison de données distribué et la structure des DLPDU du bus de terrain utilisée pour le transfert de données et d'informations de commande par le protocole de la présente norme, et leur représentation comme unités de données d'interface physique. Cette deuxième édition annule et remplace la première édition, parue en 2010. Elle constitue une révision technique. Les modifications sont:
- Introduction de nouvelles PDU d'analyse topologique;
- Réparation d'erreurs, à savoir ajout du champ Version dans certaines PDU;
- Introduction de nouveaux descripteurs de liaison physique.

General Information

• Status: Published
• Publication Date: 30-Mar-2023
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.20 - Data link layer
• ICS: 35.110 - Networking
• Technical Committee: SC 65C - Industrial networks
• Current Stage: WPUB - Publication withdrawn
• Completion Date: 31-Mar-2023

Standards Content (Sample)

IEC 61158-4-22
Edition 2.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 4-22: Data-link layer protocol specification – Type 22 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-22: Spécification du protocole de la couche liaison de données –
Éléments de type 22
IEC 61158-4-22:2014-08(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2014 IEC, Geneva, Switzerland

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.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and

Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14

documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International

iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in

variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions

committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries

and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: [e-mail].
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC

en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et

comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus

projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just

Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette

Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:

[e-mail].
---------------------- Page: 2 ----------------------
IEC 61158-4-22
Edition 2.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 4-22: Data-link layer protocol specification – Type 22 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-22: Spécification du protocole de la couche liaison de données –
Éléments de type 22
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-1729-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61158-4-22:2014 © IEC 2014
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope ............................................................................................................................... 9

1.1 General ................................................................................................................... 9

1.2 Specifications .......................................................................................................... 9

1.3 Procedures .............................................................................................................. 9

1.4 Applicability ............................................................................................................. 9

1.5 Conformance ......................................................................................................... 10

2 Normative references ..................................................................................................... 10

3 Terms, definitions, symbols, abbreviations and conventions ........................................... 10

3.1 Reference model terms and definitions .................................................................. 11

3.2 Service convention terms and definitions ............................................................... 12

3.3 Common terms and definitions .............................................................................. 13

3.4 Additional Type 22 definitions ................................................................................ 14

3.5 Common symbols and abbreviations ..................................................................... 17

3.6 Additional Type 22 symbols and abbreviations ...................................................... 18

3.7 Conventions .......................................................................................................... 20

4 Overview of the DL-protocol ........................................................................................... 21

4.1 Operating principle ................................................................................................ 21

4.2 Communication model ........................................................................................... 21

4.3 Topology ............................................................................................................... 22

4.4 DLPDU processing ................................................................................................ 22

4.5 General communication mechanisms .................................................................... 23

4.6 Gateway ................................................................................................................ 24

4.7 Interaction models ................................................................................................. 24

5 DLPDU structure ............................................................................................................ 24

5.1 Overview ............................................................................................................... 24

5.2 Data types and encoding rules .............................................................................. 25

5.3 DLPDU identification ............................................................................................. 26

5.4 General DLPDU structure ...................................................................................... 27

5.5 Communication management DLPDUs .................................................................. 29

5.6 Cyclic data channel (CDC) DLPDUs ...................................................................... 37

5.7 Cyclic data channel (CDC) DLPDU data ................................................................ 38

5.8 Message channel (MSC) DLPDUs ......................................................................... 38

5.9 Message channel DLPDU data - MSC message transfer protocol (MSC-MTP) ....... 40

5.10 Time synchronization ............................................................................................ 43

6 Telegram timing and DLPDU handling ............................................................................ 45

6.1 Communication mechanism ................................................................................... 45

6.2 Device synchronization .......................................................................................... 47

7 Type 22 protocol machines ............................................................................................. 47

7.1 RTFL device protocol machines............................................................................. 47

7.2 RTFN device protocol machines ............................................................................ 59

7.3 Message channel – Message transfer protocol (MSC-MTP) ................................... 61

Bibliography .......................................................................................................................... 65

---------------------- Page: 4 ----------------------
IEC 61158-4-22:2014 © IEC 2014 – 3 –

Figure 1 – DLPDU sequence ................................................................................................. 46

Figure 2 – Communication relationship RTFN device ............................................................ 46

Figure 3 – Overview RTFL device protocol machines ............................................................ 48

Figure 4 – Protocol machine send DLPDU procedure ............................................................ 49

Figure 5 – Protocol machine receive DLPDU procedure ........................................................ 49

Figure 6 – CDCL send cyclic data sequence ......................................................................... 50

Figure 7 – CDCL receive cyclic data sequence ..................................................................... 51

Figure 8 – MSCL send sequence .......................................................................................... 52

Figure 9 – MSCL receive sequence ...................................................................................... 53

Figure 10 – Network management protocol machine ............................................................. 54

Figure 11 – Net management sequence at system boot up ................................................... 55

Figure 12 – Initialization sequence ordinary device ............................................................... 56

Figure 13 – PCS configuration sequence .............................................................................. 57

Figure 14 – Delay measurement principle ............................................................................. 58

Figure 15 – Overview RTFN device protocol machines ......................................................... 59

Figure 16 – CDCN connection setup and release .................................................................. 60

Figure 17 – CDCN unpulish data ........................................................................................... 61

Figure 18 – Segmentation sequence ..................................................................................... 62

Figure 19 – Expedited transfer sequence .............................................................................. 62

Figure 20 – Toggling from expedited transfer to segmented transfer ..................................... 63

Figure 21 – Segmentation sequence for broad- or multicast message without

Acknowledgement ................................................................................................................. 64

Table 1 – DLPDU element definition ..................................................................................... 20

Table 2 – Conventions for protocol machine description ....................................................... 21

Table 3 – Transfer syntax for bit sequences .......................................................................... 25

Table 4 – Transfer syntax for data type Unsignedn ............................................................... 26

Table 5 – Transfer syntax for data type Signedn ................................................................... 26

Table 6 – Type 22 DLPDU inside an ISO/IEC 8802-3 ............................................................ 27

Table 7 – Type 22 DLPDU inside a VLAN tagged ISO/IEC 8802-3 DLPDU ............................ 27

Table 8 – Type 22 DLPDU inside an UDP DLPDU................................................................. 28

Table 9 – General structure of a Type 22 DLPDU ................................................................. 28

Table 10 – DLPDU header structure ..................................................................................... 29

Table 11 – Network verification prepare DLPDU ................................................................... 29

Table 12 – Network verification environment DLPDU ............................................................ 29

Table 13 – Network verification information DLPDU .............................................................. 29

Table 14 – Network verification acknowledgement DLPDU.................................................... 30

Table 15 – RTFN scan network request DLPDU .................................................................... 30

Table 16 – RTFN scan network response DLPDU ................................................................. 30

Table 17 – Identification data ................................................................................................ 30

Table 18 – Identification data v2 ........................................................................................... 31

Table 19 – PhyLinkPortX ...................................................................................................... 32

Table 20 – RTF support ........................................................................................................ 33

---------------------- Page: 5 ----------------------
– 4 – IEC 61158-4-22:2014 © IEC 2014

Table 21 – RTF2 support ...................................................................................................... 33

Table 22 – UseDHCP ............................................................................................................ 34

Table 23 – DeviceRole .......................................................................................................... 34

Table 24 – RTFN connection management DLPDU ............................................................... 35

Table 25 – CDCN connection still alive DLPDU ..................................................................... 35

Table 26 – ID data ................................................................................................................ 35

Table 27 – RTFL control DLPDU ........................................................................................... 35

Table 28 – RTFL configuration DLPDU ................................................................................. 36

Table 29 – RTFL configuration acknowledgement DLPDU .................................................... 36

Table 30 – RTFL configuration 2 DLPDU .............................................................................. 37

Table 31 – RTFL configuration acknowledgement 2 DLPDU .................................................. 37

Table 32 – CDCL DLPDU ...................................................................................................... 37

Table 33 – CDCN DLPDU ..................................................................................................... 38

Table 34 – CDC DLPDU data arrangement ........................................................................... 38

Table 35 – CDC DLPDU data ................................................................................................ 38

Table 36 – MSCL DLPDU ..................................................................................................... 39

Table 37 – MSCL control ...................................................................................................... 39

Table 38 – MSCN DLPDU ..................................................................................................... 40

Table 39 – MSC-MTP frame structure ................................................................................... 40

Table 40 – Address type ....................................................................................................... 41

Table 41 – MSC-MTP Init structure ....................................................................................... 41

Table 42 – MSC-MTP Init_Fast structure .............................................................................. 42

Table 43 – MSC-MTP Send structure .................................................................................... 42

Table 44 – MSC-MTP Acknowledgement structure ................................................................ 42

Table 45 – MSC-MTP Abort structure.................................................................................... 43

Table 46 – Data structure of a message ................................................................................ 43

Table 47 – DelayMeasurement start encoding ....................................................................... 43

Table 48 – DelayMeasurement read encoding....................................................................... 44

Table 49 – PCS configuration encoding ................................................................................ 44

Table 50 – Time synchronization service request .................................................................. 44

Table 51 – Time synchronization service response ............................................................... 44

---------------------- Page: 6 ----------------------
IEC 61158-4-22:2014 © IEC 2014 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-22: Data-link layer protocol specification –
Type 22 elements
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

Attention is drawn to the fact that the use of the associated protocol type is restricted by its

intellectual-property-right holders. In all cases, the commitment to limited release of

intellectual-property-rights made by the holders of those rights permits a layer protocol type to

be used with other layer protocols of the same type, or in other type combinations explicitly

authorized by its intellectual-property-right holders.

NOTE Combinations of protocol types are specified in IEC 61784-1 and IEC 61784-2.

International Standard IEC 61158-4-22 has been prepared by subcommittee 65C: Industrial

networks, of IEC technical committee 65: Industrial process measurement, control and

automation.

This second edition cancels and replaces the first edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following technical changes with respect to the previous edition.

• Introduction of new topology scan PDUs.
---------------------- Page: 7 ----------------------
– 6 – IEC 61158-4-22:2014 © IEC 2014
• Bug fix of missing version field in some PDUs.
• Introduction of new Physical Link descriptors.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/762/FDIS 65C/772/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61158 series, published under the general title Industrial

communication networks – Fieldbus specifications, can be found on the IEC web site.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
IEC 61158-4-22:2014 © IEC 2014 – 7 –
INTRODUCTION

This part of IEC 61158 is one of a series produced to facilitate the interconnection of

automation system components. It is related to other standards in the set as defined by the

“three-layer” fieldbus reference model described in IEC 61158-1.

The data-link protocol provides the data-link service by making use of the services available

from the physical layer. The primary aim of this standard is to provide a set of rules for

communication expressed in terms of the procedures to be carried out by peer data-link

entities (DLEs) at the time of communication. These rules for communication are intended to

provide a sound basis for development in order to serve a variety of purposes:
a) as a guide for implementers and designers;
b) for use in the testing and procurement of equipment;

c) as part of an agreement for the admittance of systems into the open systems environment;

d) as a refinement to the understanding of time-critical communications within OSI.

This standard is concerned, in particular, with the communication and interworking of sensors,

effectors and other automation devices. By using this standard together with other standards

positioned within the OSI or fieldbus reference models, otherwise incompatible systems may

work together in any combination.

NOTE Use of some of the associated protocol types is restricted by their intellectual-property-right holders. In all

cases, the commitment to limited release of intellectual-property-rights made by the holders of those rights permits

a particular data-link layer protocol type to be used with physical layer and application layer protocols in Type

combinations as specified explicitly in the profile parts. Use of the various protocol types in other combinations

may require permission from their respective intellectual-property-right holders.

The International Electrotechnical Commission (IEC) draws attention to the fact that it is

claimed that compliance with this document may involve the use of patents concerning

Type 22 elements and possibly other types:

WO-2006/069691 A1 [PI] Control system with a plurality of spatially distributed stations

and method for transmitting data in said control system

DE-10 2004 063 213 [PI] Steuerungssystem mit einer Vielzahl von räumlich verteilten

B4 Stationen sowie Verfahren zum Übertragen von Daten in einem
solchen Steuerungssystem

EP-1 828 858 A1 [PI] Control system with a plurality of spatially distributed stations

and method for transmitting data in said control system

JP-4 848 469 B2 [PI] Control system with a plurality of spatially distributed stations

and method for transmitting data in said control system

CN-101 111 807 [PI] Control system with a plurality of spatially distributed stations

and method for transmitting data in said control system

US-8 144 718 B2 [PI] Control system having a plurality of spatially distributed stations,

and method for transmitting data in such a control system

IEC takes no position concerning the evidence, validity and scope of these patent rights.

---------------------- Page: 9 ----------------------
– 8 – IEC 61158-4-22:2014 © IEC 2014
The holders of these patent righ
...