IEC 61158-6-12:2019

Industrial communication networks - Fieldbus specifications - Part 6-12: Application layer protocol specification - Type 12 elements

IEC 61158-6-12:2019 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 2 fieldbus. The term “time-critical” is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.
This International Standard specifies interactions between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer. The purpose of this document is to define the protocol provided to
a) define the wire-representation of the service primitives defined in this document, and
b) define the externally visible behavior associated with their transfer. This document specifies the protocol of the Type 2 fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545).
This fourth edition includes the following significant technical changes with respect to the previous edition:
- technical corrections; and
- editorial improvements for clarification.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-12: Spécification du protocole de la couche application - Eléments de type 12

L’IEC 61158-6-12:2019 fournit des éléments communs pour les communications de messagerie prioritaires et non prioritaires élémentaires entre les programmes d’application des environnements d’automatisation et le matériel spécifique au bus de terrain de type 12. On utilise le terme "prioritaire" pour traduire la présence d’une fenêtre temporelle, à l’intérieur de laquelle il est exigé qu’une ou plusieurs actions spécifiées soient terminées avec un niveau de certitude défini. Si les actions spécifiées ne sont pas réalisées dans la fenêtre temporelle, les applications demandant les actions risquent de connaître une défaillance, avec les risques que cela comporte pour les équipements, les installations et éventuellement la vie humaine.
La présente norme définit de manière abstraite le comportement, visible par un observateur externe, assuré par les différents Types de la couche Application de bus de terrain, en termes
a) de syntaxe abstraite définissant les unités de données de protocole de la couche Application, transmises entre les entités d’application en communication,
b) de syntaxe de transfert définissant les unités de données de protocole de la couche Application, transmises entre les entités d’application en communication;
c) de diagramme d’états de contexte d’application définissant le comportement de service d’application observable entre les entités d’application en communication; et
d) de diagrammes d’états de relations entre applications définissant le comportement de communication visible entre les entités d’application en communication

General Information

• Status: Published
• Publication Date: 19-Jun-2019
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.70 - Application 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: 20-Jun-2019

Relations

• Revises: IEC 61158-6-12:2014 - Industrial communication networks - Fieldbus specifications - Part 6-12: Application layer protocol specification - Type 12 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61158-6-12 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-12: Application layer protocol specification – 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
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IEC 61158-6-12 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 6-12: Application layer protocol specification – Type 12 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-7011-0

– 2 – IEC 61158-6-12:2019 © IEC 2019
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
1.1 General . 11
1.2 Specifications . 12
1.3 Conformance . 12
2 Normative references . 12
3 Terms, definitions, symbols, abbreviations and conventions . 13
3.1 Reference model terms and definitions . 13
3.2 Service convention terms and definitions . 14
3.3 Application layer definitions . 14
3.4 Common symbols and abbreviations . 19
3.5 Additional symbols and abbreviations . 20
3.6 Conventions . 20
3.6.1 General concept . 20
3.6.2 Convention for the encoding of reserved bits and octets . 21
3.6.3 Conventions for the common codings of specific field octets . 21
3.6.4 Abstract syntax conventions . 22
3.6.5 State machine conventions . 23
4 Application layer protocol specification . 25
4.1 Operating principle . 25
4.2 Node reference model . 25
4.2.1 Mapping onto OSI basic reference model. 25
4.2.2 Data Link Layer features . 26
4.2.3 Application Layer structure . 26
5 FAL syntax description . 27
5.1 Coding principles . 27
5.2 Data types and encoding rules . 27
5.2.1 General description of data types and encoding rules . 27
5.2.2 Encoding of a Boolean value . 27
5.2.3 Encoding of a Time Of Day with and without date indication value . 27
5.2.4 Encoding of a Time Difference with and without date indication value . 28
5.2.5 Transfer syntax for bit sequences . 28
5.2.6 Encoding of a Unsigned Integer value . 28
5.2.7 Encoding of a Signed Integer value . 29
5.2.8 Encoding of a Floating Point value . 30
5.2.9 Encoding of a Visible String value. 30
5.2.10 Encoding of a Unicode String value . 30
5.2.11 Encoding of an Octet String value . 30
5.2.12 Encoding of GUID . 30
5.3 AR coding . 30
5.3.1 AL Control Request (Indication) . 30
5.3.2 AL Control Response (Confirmation) . 31
5.3.3 AL State Changed . 33
5.3.4 AL AR Attributes . 34
5.4 SII coding . 36

5.5 Isochronous PDI coding . 41
5.6 CoE coding . 43
5.6.1 PDU structure . 43
5.6.2 SDO . 44
5.6.3 SDO Information . 56
5.6.4 Emergency . 65
5.6.5 Process Data . 69
5.6.6 Command . 70
5.6.7 Object Dictionary . 71
5.7 EoE coding . 81
5.7.1 Initiate EoE . 81
5.7.2 EoE Fragment Data . 83
5.7.3 Data element for EoE . 84
5.7.4 Set IP Parameter . 85
5.7.5 Set Address Filter . 88
5.8 FoE Coding . 90
5.8.1 Read Request . 90
5.8.2 Write Request . 91
5.8.3 Data Request . 92
5.8.4 Ack Request . 93
5.8.5 Error Request . 94
5.8.6 Busy Request . 95
6 FAL protocol state machines . 96
6.1 Overall structure . 96
6.1.1 Overview . 96
6.1.2 Fieldbus Service Protocol Machines (FSPM). 97
6.1.3 Application Relationship Protocol Machines (ARPM) . 97
6.1.4 DLL Mapping Protocol Machines (DMPM) . 98
6.2 AP-Context state machine . 98
6.3 FAL service protocol machine (FSPM) . 98
6.4 Application Relationship Protocol Machines (ARPMs) . 98
6.4.1 AL state machine . 98
6.4.2 Mailbox handler state machine . 117
6.4.3 CoE state machine . 118
6.4.4 EoE state machine . 129
6.4.5 FoE state machine . 136
6.5 DLL mapping protocol machine (DMPM) . 141
Bibliography . 142

Figure 1 – Common structure of specific fields . 21
Figure 2 – Type description example. 22
Figure 3 – Slave Node Reference Model . 26
Figure 4 – Encoding of Time of Day value . 27
Figure 5 – Encoding of Time Difference value . 28
Figure 6 – AL Control Request structure . 30
Figure 7 – AL Control Response structure . 31
Figure 8 – AL State Changed structure . 34

– 4 – IEC 61158-6-12:2019 © IEC 2019
Figure 9 – PDI Control type description . 34
Figure 10 – Sync Configuration type description . 35
Figure 11 – Distributed Clock sync and latch type description . 41
Figure 12 – CoE general structure .
...

IEC 61158-6-12 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-12: Application layer protocol specification – Type 12 elements

Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-12: Spécification du protocole de la couche application – Eléments
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
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International Standards for all electrical, electronic and related technologies.

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IEC 61158-6-12 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –

Part 6-12: Application layer protocol specification – Type 12 elements

Réseaux de communication industriels – Spécifications des bus de terrain –

Partie 6-12: Spécification du protocole de la couche application – Eléments

de type 12
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-9324-9

– 2 – IEC 61158-6-12:2019 © IEC 2019
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
1.1 General . 11
1.2 Specifications . 12
1.3 Conformance . 12
2 Normative references . 12
3 Terms, definitions, symbols, abbreviations and conventions . 13
3.1 Reference model terms and definitions . 13
3.2 Service convention terms and definitions . 14
3.3 Application layer definitions . 15
3.4 Common symbols and abbreviations . 20
3.5 Additional symbols and abbreviations . 21
3.6 Conventions . 21
3.6.1 General concept . 21
3.6.2 Convention for the encoding of reserved bits and octets . 22
3.6.3 Conventions for the common codings of specific field octets . 22
3.6.4 Abstract syntax conventions . 23
3.6.5 State machine conventions . 24
4 Application layer protocol specification . 26
4.1 Operating principle . 26
4.2 Node reference model . 26
4.2.1 Mapping onto OSI basic reference model. 26
4.2.2 Data Link Layer features . 27
4.2.3 Application Layer structure . 27
5 FAL syntax description . 28
5.1 Coding principles . 28
5.2 Data types and encoding rules . 28
5.2.1 General description of data types and encoding rules . 28
5.2.2 Encoding of a Boolean value . 28
5.2.3 Encoding of a Time Of Day with and without date indication value . 28
5.2.4 Encoding of a Time Difference with and without date indication value . 29
5.2.5 Transfer syntax for bit sequences . 29
5.2.6 Encoding of a Unsigned Integer value . 29
5.2.7 Encoding of a Signed Integer value . 30
5.2.8 Encoding of a Floating Point value . 31
5.2.9 Encoding of a Visible String value. 31
5.2.10 Encoding of a Unicode String value . 31
5.2.11 Encoding of an Octet String value . 31
5.2.12 Encoding of GUID . 31
5.3 AR coding . 31
5.3.1 AL Control Request (Indication) . 31
5.3.2 AL Control Response (Confirmation) . 32
5.3.3 AL State Changed . 34
5.3.4 AL AR Attributes . 35
5.4 SII coding . 37

5.5 Isochronous PDI coding . 42
5.6 CoE coding . 44
5.6.1 PDU structure . 44
5.6.2 SDO . 45
5.6.3 SDO Information . 57
5.6.4 Emergency . 66
5.6.5 Process Data . 70
5.6.6 Command . 71
5.6.7 Object Dictionary . 72
5.7 EoE coding . 82
5.7.1 Initiate EoE . 82
5.7.2 EoE Fragment Data . 84
5.7.3 Data element for EoE . 85
5.7.4 Set IP Parameter . 86
5.7.5 Set Address Filter . 89
5.8 FoE Coding . 91
5.8.1 Read Request . 91
5.8.2 Write Request . 92
5.8.3 Data Request . 93
5.8.4 Ack Request . 94
5.8.5 Error Request . 95
5.8.6 Busy Request . 96
6 FAL protocol state machines . 97
6.1 Overall structure . 97
6.1.1 Overview . 97
6.1.2 Fieldbus Service Protocol Machines (FSPM). 98
6.1.3 Application Relationship Protocol Machines (ARPM) . 98
6.1.4 DL
...