IEC 61158-3-12:2019

Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements

IEC 61158-3-12:2019 defines the services provided to the Type 12 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model and systems management at the boundary between the data-link layer and systems management of the fieldbus reference model. This fourth edition cancels and replaces the third edition published in 2014. It constitutes a technical revision. The main changes are:
- Technical corrections in the communication services
- Editorial improvements for clarification.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 3-12: Définition des services de couche liaison de données - Éléments de type 12

L’IEC 61158-3-12:2019 fournit les éléments communs pour les communications de messagerie de base à temps critique entre des appareils dans un environnement d’automation. Le terme "à temps critique" sert à représenter la présence d'une fenêtre temporelle, dans les limites de laquelle une ou plusieurs actions spécifiées sont tenues d'être parachevées avec un certain niveau défini de certitude. Le manquement à parachever les actions spécifiées dans les limites de la fenêtre temporelle risque d'entraîner la défaillance des applications qui demandent ces actions, avec le risque concomitant pour l'équipement, l'installation et éventuellement pour la vie humaine.
La présente Norme internationale définit de manière abstraite le service visible de l'extérieur fourni par la couche liaison de données de réseau de terrain type 12 en termes:
a) des actions et événements primitifs du service;
b) des paramètres associés à chaque action primitive et événement primitif, et la forme qu'ils prennent;
c) de l'interrelation entre ces actions et événements, et leurs séquences valides.

General Information

• Status: Published
• Publication Date: 23-Apr-2019
• 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
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 26-Apr-2019
• Completion Date: 24-Apr-2019

Relations

• Revises: IEC 61158-3-12:2014 - Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61158-3-12 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 3-12: Data-link layer service definition – Type 12 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
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
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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
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latest edition, a corrigendum or an amendment might have been published.

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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 61158-3-12 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 3-12: Data-link layer service definition – Type 12 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6788-2

– 2 – IEC 61158-3-12:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
1.1 General . 8
1.2 Specifications . 8
1.3 Conformance . 8
2 Normative references . 9
3 Terms, definitions, symbols, abbreviations and conventions . 9
3.1 Reference model terms and definitions . 9
3.2 Service convention terms and definitions . 10
3.3 Data-link service terms and definitions . 11
3.4 Symbols and abbreviations . 14
3.5 Common conventions . 16
4 Data-link layer services and concepts . 17
4.1 Operating principle . 17
4.2 Topology . 17
4.3 Data-link layer overview . 18
4.4 Error detection overview . 19
4.5 Parameter and process data handling introduction . 19
4.6 Node reference model . 19
4.6.1 Mapping onto OSI Basic Reference Model . 19
4.6.2 Data-link layer features . 20
4.7 Operation overview . 20
4.7.1 Relation to ISO/IEC/IEEE 8802-3 . 20
4.7.2 Type 12 modes . 20
4.7.3 Logical topology . 21
4.8 Addressing . 22
4.8.1 Addressing overview . 22
4.8.2 Segment addressing . 22
4.8.3 Device addressing . 22
4.8.4 Logical addressing . 23
4.8.5 FMMU introduction . 23
4.8.6 Sync manager introduction . 24
4.9 Slave classification . 24
4.9.1 Full slave . 24
4.9.2 Basic slave . 24
4.10 Structure of the communication layer in the slave . 24
5 Communication services . 26
5.1 Overview. 26
5.2 Read services . 26
5.2.1 Overview . 26
5.2.2 Positional physical read (APRD) . 26
5.2.3 Configured-address physical read (FPRD) . 27
5.2.4 Broadcast read (BRD) . 28
5.2.5 Logical read (LRD) . 28
5.3 Write services . 29

5.3.1 Overview . 29
5.3.2 Positional physical write (APWR) . 29
5.3.3 Configured-address physical write (FPWR) . 30
5.3.4 Broadcast write (BWR) . 30
5.3.5 Logical write (LWR) . 31
5.4 Combined read/write services . 32
5.4.1 Overview . 32
5.4.2 Positional physical read/write (APRW) . 32
5.4.3 Configured-address physical read/write (FPRW) . 32
5.4.4 Broadcast read/write (BRW) . 33
5.4.5 Logical read/write (LRW) . 34
5.4.6 Positional physical read / multiple write (ARMW) . 34
5.4.7 Configured-address physical read / multiple write (FRMW) . 35
5.5 Network services . 35
5.5.1 Overview . 35
5.5.2 Publish network variables (PNV) . 36
5.6 Mailbox . 36
5.6.1 Overview . 36
5.6.2 Mailbox data transmission services . 38
6 Local interactions . 41
6.1 Read local . 41
6.2 Write local. 41
6.3 Event local . 42
Bibliography . 43

Figure 1 – Mapping of logical data in an Ethernet frame consisting of a single Type 12
DLPDU . 18
Figure 2 – Type 12 data-link reference model . 20
Figure 3 – Type 12 segments in open mode . 21
Figure 4 – Type 12 segment in direct mode . 21
Figure 5 – Addressing mode overview. 22
Figure 6 – Fieldbus memory management unit overview . 23
Figure 7 – Layering of communication . 25
Figure 8 – Flow of Type 12 service primitives . 26
Figure 9 – Successful mailbox write sequence . 37
Figure 10 – Successful mailbox read sequence . 38

Table 1 – Auto-increment physical read (APRD) . 27
Table 2 – Configured-address physical read (FPRD) . 27
Table 3 – Broadcast read (BRD) . 28
Table 4 – Logical read (LRD) . 29
Table 5 – Auto-increment physical write (APWR) . 29
Table 6 – Configured-address physical write (FPWR) . 30
Table 7 – Broadcast write (BWR) . 31
Table 8 – Logical write (LWR) . 31
Table 9 – Auto-increment physical read/write (APRW) . 32

– 4 – IEC 61158-3-12:2019 © IEC 2019
Table 10 – Configured-address physical read/write (FPRW) . 33
Table 11 – Broadcast read/write (BRW) . 33
Table 12 – Logical read/write (LRW) . 34
Table 13 – Auto-increment physical read / multiple write (ARMW) . 34
Table 14 – Configured-address physical read / multiple write (FRMW) .
...

IEC 61158-3-12 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 3-12: Data-link layer service definition – Type 12 elements

Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 3-12: Définition des services de couche liaison de données – Éléments
de type 12
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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questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
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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 61158-3-12 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –

Part 3-12: Data-link layer service definition – Type 12 elements

Réseaux de communication industriels – Spécifications des bus de terrain –

Partie 3-12: Définition des services de couche liaison de données – Éléments

de type 12
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-9112-2

– 2 – IEC 61158-3-12:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
1.1 General . 8
1.2 Specifications . 8
1.3 Conformance . 8
2 Normative references . 9
3 Terms, definitions, symbols, abbreviations and conventions . 9
3.1 Reference model terms and definitions . 9
3.2 Service convention terms and definitions . 10
3.3 Data-link service terms and definitions . 11
3.4 Symbols and abbreviations . 14
3.5 Common conventions . 16
4 Data-link layer services and concepts . 17
4.1 Operating principle . 17
4.2 Topology . 17
4.3 Data-link layer overview . 18
4.4 Error detection overview . 19
4.5 Parameter and process data handling introduction . 19
4.6 Node reference model . 19
4.6.1 Mapping onto OSI Basic Reference Model . 19
4.6.2 Data-link layer features . 20
4.7 Operation overview . 20
4.7.1 Relation to ISO/IEC/IEEE 8802-3 . 20
4.7.2 Type 12 modes . 20
4.7.3 Logical topology . 21
4.8 Addressing . 22
4.8.1 Addressing overview . 22
4.8.2 Segment addressing . 22
4.8.3 Device addressing . 22
4.8.4 Logical addressing . 23
4.8.5 FMMU introduction . 23
4.8.6 Sync manager introduction . 24
4.9 Slave classification . 24
4.9.1 Full slave . 24
4.9.2 Basic slave . 24
4.10 Structure of the communication layer in the slave . 24
5 Communication services . 26
5.1 Overview. 26
5.2 Read services . 26
5.2.1 Overview . 26
5.2.2 Positional physical read (APRD) . 26
5.2.3 Configured-address physical read (FPRD) . 27
5.2.4 Broadcast read (BRD) . 28
5.2.5 Logical read (LRD) . 28
5.3 Write services . 29

5.3.1 Overview . 29
5.3.2 Positional physical write (APWR) . 29
5.3.3 Configured-address physical write (FPWR) . 30
5.3.4 Broadcast write (BWR) . 30
5.3.5 Logical write (LWR) . 31
5.4 Combined read/write services . 32
5.4.1 Overview . 32
5.4.2 Positional physical read/write (APRW) . 32
5.4.3 Configured-address physical read/write (FPRW) . 32
5.4.4 Broadcast read/write (BRW) . 33
5.4.5 Logical read/write (LRW) . 34
5.4.6 Positional physical read / multiple write (ARMW) . 34
5.4.7 Configured-address physical read / multiple write (FRMW) . 35
5.5 Network services . 35
5.5.1 Overview . 35
5.5.2 Publish network variables (PNV) . 36
5.6 Mailbox . 36
5.6.1 Overview . 36
5.6.2 Mailbox data transmission services . 38
6 Local interactions . 41
6.1 Read local . 41
6.2 Write local. 41
6.3 Event local . 42
Bibliography . 43

Figure 1 – Mapping of logical data in an Ethernet frame consisting of a single Type 12
DLPDU .
...