IEC 61158-6-2:2019
(Main)Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements
Industrial communication networks - Fieldbus specifications - Part 6-2: Application layer protocol specification - Type 2 elements
IEC 61158-6-2:2019 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:
- clarifications of response PDU formats in case of failure in 4.1.5;
- clarifications of connection request priority definition and handling in 4.1.6.5 and 4.1.6.6;
- clarification of connection remaining path in 4.1.6.12;
- extensions of general syntax in 4.1.8.1;
- extensions and clarifications of Identity object PDUs in 4.1.8.2;
- updates of Assembly object PDUs in 4.1.8.4;
- extensions and clarification of Time sync object PDUs in 4.1.8.6;
- updates of Parameter object PDUs in 4.1.8.7;
- extensions of Connection Manager object PDUs in 4.1.8.8;
- clarifications of Connection object PDUs in 4.1.8.9;
- extensions and clarifications of message and connection paths in 4.1.9;
- updates of object and service class codes in 4.1.10 and error codes in 4.1.11;
- updates of data types in 4.2.4, 5.1.3 and 5.2.3;
- updates of the encapsulation abstract syntax in 4.3;
- updates to the DLL mapping protocol machine 2 in Clause 11;
- miscellaneous editorial corrections.
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 6-2: Spécification du protocole de la couche liaison de données - Eléments de type 2
L’IEC 61158-6-2:2019 fournit des éléments communs pour les communications à temps critique ou non entre des programmes d'application dans un environnement et avec un matériel d'automation spécifiques aux bus de terrain de type 2. Le terme "à temps critique" signale l'existence d'une fenêtre temporelle dans laquelle est exigée la réalisation d'une ou de plusieurs actions spécifiées, avec un niveau de certitude défini. La non-réalisation des actions spécifiées dans la fenêtre temporelle induit un risque de défaillance des applications qui demandent ces actions, avec les risques relatifs à l'équipement, les installations et éventuellement la vie humaine.
Le présent document spécifie les interactions entre les applications distantes et définit le comportement, visible par un observateur externe, assuré par la couche application de bus de terrain de type 2, en termes
a) de syntaxe abstraite formelle définissant les unités de données de protocole de couche application, acheminées entre les entités d'application en communication;
b) de syntaxe de transfert définissant les règles de codage qui s'appliquent aux unités de données de protocole de couche application;
c) du diagramme d'états de contexte application définissant le comportement de service application visible entre des entités d'application engagées dans une communication;
d) de diagrammes d'états de relations d'applications définissant le comportement de communication visible entre les entités d'application en communication.
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IEC 61158-6-2 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-2: Application 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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IEC 61158-6-2 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 6-2: Application layer protocol specification – Type 2 elements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-7007-3
– 2 – IEC 61158-6-2:2019 © IEC 2019
CONTENTS
FOREWORD . 14
INTRODUCTION . 16
1 Scope . 17
1.1 General . 17
1.2 Specifications . 17
1.3 Conformance . 18
2 Normative references . 18
3 Terms, definitions, symbols, abbreviated terms and conventions . 20
3.1 Terms and definitions from other ISO/IEC standards . 20
3.1.1 Terms and definitions from ISO/IEC 7498-1 . 20
3.1.2 Terms and definitions from ISO/IEC 9545 . 21
3.1.3 Terms and definitions from ISO/IEC 8824-1 . 21
3.1.4 Terms and definitions from ISO/IEC 8825-1 . 22
3.2 Terms and definitions from IEC 61158-5-2 . 22
3.3 Additional terms and definitions . 22
3.4 Abbreviated terms and symbols . 29
3.5 Conventions . 29
3.5.1 General concept . 29
3.5.2 Attribute specification . 30
3.5.3 Common services . 30
3.5.4 State machine conventions . 34
4 Abstract syntax . 35
4.1 FAL PDU abstract syntax . 35
4.1.1 General . 35
4.1.2 PDU structure . 36
4.1.3 UCMM_PDUs . 38
4.1.4 Transport_Headers . 40
4.1.5 CM_PDUs . 43
4.1.6 CM PDU components . 57
4.1.7 MR headers . 66
4.1.8 OM_Service_PDU . 67
4.1.9 Message and connection paths . 122
4.1.10 Class, attribute and service codes . 137
4.1.11 Error codes . 143
4.2 Data abstract syntax specification . 157
4.2.1 Transport format specification . 157
4.2.2 Abstract syntax notation . 157
4.2.3 Control network data specification . 158
4.2.4 Data type specification / dictionaries . 160
4.3 Encapsulation abstract syntax . 162
4.3.1 Encapsulation protocol . 162
4.3.2 Command descriptions . 165
4.3.3 Common packet format . 177
5 Transfer syntax . 181
5.1 Compact encoding . 181
5.1.1 Encoding rules . 181
5.1.2 Encoding constraints . 182
5.1.3 Examples. 182
5.2 Data type reporting . 188
5.2.1 Object data representation. 188
5.2.2 Elementary data type reporting . 189
5.2.3 Constructed data type reporting . 190
6 Structure of FAL protocol state machines . 196
7 AP-Context state machine . 196
7.1 Overview. 196
7.2 Connection object state machine . 196
7.2.1 I/O Connection instance behavior . 196
7.2.2 Bridged Connection instance behavior . 200
7.2.3 Explicit Messaging Connection instance behavior . 201
8 FAL service protocol machine (FSPM) . 204
8.1 General . 204
8.2 Primitive definitions . 204
8.3 Parameters of primitives . 209
8.4 FSPM state machines . 209
9 Application relationship protocol machines (ARPMs) . 210
9.1 General . 210
9.2 Connection-less ARPM (UCMM) . 210
9.2.1 General . 210
9.2.2 Primitive definitions . 210
9.2.3 Parameters of primitives . 211
9.2.4 UCMM state machines . 212
9.2.5 Examples of UCMM sequences . 217
9.2.6 Management UCMM . 219
9.3 Connection-oriented ARPMs (transports) . 220
9.3.1 Transport PDU buffer . 220
9.3.2 Transport classes . 220
9.3.3 Common primitive definitions . 221
9.3.4 Parameters of common primitives . 222
9.3.5 Transport state machines – class 0 . 222
9.3.6 Transport state machines – class 1 . 226
9.3.7 Transport state machines – class 2 . 231
9.3.8 Transport state machines – class 3 . 239
9.3.9 Transport state machines – classes 4, 5, 6 . 249
9.3.10 Transport state machines – class 4 . 249
9.3.11 Transport state machines – class 5 . 249
9.3.12 Transport state machines – class 6 . 249
10 DLL mapping protocol machine 1 (DMPM 1) . 249
10.1 General . 249
10.2 Link producer . 250
10.3 Link consumer . 250
10.4 Primitive definitions . 250
10.4.1 Primitives exchanged between DMPM and ARPM . 250
10.4.2 Parameters of ARPM/DMPM primitives . 250
10.4.3 Primitives exchanged between data-link layer and DMPM . 251
– 4 – IEC 61158-6-2:2019 © IEC 2019
10.4.4 Parameters of DMPM/Data-link Layer primitives . 251
10.4.5 Network connection ID . 252
10.5 DMPM state machine . 253
10.5.1 DMPM states .
...
IEC 61158-6-2 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-2: Application layer protocol specification – Type 2 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-2: Spécification du protocole de la couche liaison de données –
Eléments 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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Switzerland
About the IEC
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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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IEC 61158-6-2 ®
Edition 4.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 6-2: Application layer protocol specification – Type 2 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 6-2: Spécification du protocole de la couche liaison de données –
Eléments de type 2
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-9699-8
– 2 – IEC 61158-6-2:2019 © IEC 2019
CONTENTS
FOREWORD . 14
INTRODUCTION . 16
1 Scope . 17
1.1 General . 17
1.2 Specifications . 17
1.3 Conformance . 18
2 Normative references . 18
3 Terms, definitions, symbols, abbreviated terms and conventions . 20
3.1 Terms and definitions from other ISO/IEC standards . 20
3.1.1 Terms and definitions from ISO/IEC 7498-1 . 20
3.1.2 Terms and definitions from ISO/IEC 9545 . 21
3.1.3 Terms and definitions from ISO/IEC 8824-1 . 21
3.1.4 Terms and definitions from ISO/IEC 8825-1 . 22
3.2 Terms and definitions from IEC 61158-5-2 . 22
3.3 Additional terms and definitions . 22
3.4 Abbreviated terms and symbols . 29
3.5 Conventions . 29
3.5.1 General concept . 29
3.5.2 Attribute specification . 30
3.5.3 Common services . 30
3.5.4 State machine conventions . 34
4 Abstract syntax . 35
4.1 FAL PDU abstract syntax . 35
4.1.1 General . 35
4.1.2 PDU structure . 36
4.1.3 UCMM_PDUs . 38
4.1.4 Transport_Headers . 40
4.1.5 CM_PDUs . 43
4.1.6 CM PDU components . 57
4.1.7 MR headers . 66
4.1.8 OM_Service_PDU . 67
4.1.9 Message and connection paths . 122
4.1.10 Class, attribute and service codes . 137
4.1.11 Error codes . 143
4.2 Data abstract syntax specification . 157
4.2.1 Transport format specification . 157
4.2.2 Abstract syntax notation . 157
4.2.3 Control network data specification . 158
4.2.4 Data type specification / dictionaries . 160
4.3 Encapsulation abstract syntax . 162
4.3.1 Encapsulation protocol . 162
4.3.2 Command descriptions . 165
4.3.3 Common packet format . 177
5 Transfer syntax . 181
5.1 Compact encoding . 181
5.1.1 Encoding rules . 181
5.1.2 Encoding constraints . 182
5.1.3 Examples. 182
5.2 Data type reporting . 188
5.2.1 Object data representation. 188
5.2.2 Elementary data type reporting . 189
5.2.3 Constructed data type reporting . 190
6 Structure of FAL protocol state machines . 196
7 AP-Context state machine . 196
7.1 Overview. 196
7.2 Connection object state machine . 196
7.2.1 I/O Connection instance behavior . 196
7.2.2 Bridged Connection instance behavior . 200
7.2.3 Explicit Messaging Connection instance behavior . 201
8 FAL service protocol machine (FSPM) . 204
8.1 General . 204
8.2 Primitive definitions . 204
8.3 Parameters of primitives . 209
8.4 FSPM state machines . 209
9 Application relationship protocol machines (ARPMs) . 210
9.1 General . 210
9.2 Connection-less ARPM (UCMM) . 210
9.2.1 General . 210
9.2.2 Primitive definitions . 210
9.2.3 Parameters of primitives . 211
9.2.4 UCMM state machines . 212
9.2.5 Examples of UCMM sequences . 217
9.2.6 Management UCMM . 219
9.3 Connection-oriented
...
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