Industrial communication networks - Fieldbus specifications - Part 5-26: Application layer service definition - Type 26 elements

IEC 61158-5-26:2023 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 26 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 document defines in an abstract way the externally visible service provided by the Type26 fieldbus application layer in terms of:
an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service;
the primitive actions and events of the service;
the parameters associated with each primitive action and event, and the form which they take; and
the interrelationship between these actions and events, and their valid sequences.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 5-26: Définition des services de la couche application - Éléments de type 26

L'IEC 61158-5-26:2023 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 26. Le terme "prioritaire" signale l’existence d’une fenêtre temporelle dans laquelle une ou plusieurs actions spécifiées doivent être réalisées, avec un niveau de certitude défini. Si les actions spécifiées ne sont pas réalisées dans la fenêtre temporelle, les demandes d’action risquent d’être rejetées, avec les risques que cela comporte pour les équipements, les installations et éventuellement la vie humaine.
Le présent document définit de manière abstraite le service, visible par un observateur extérieur, assuré par la couche application de bus de terrain de type 26, en matière:
de modèle abstrait visant à la définition des ressources d’application (objets) qui peuvent être manipulées par des utilisateurs utilisant un service FAL;
d’événements et d’actions liés aux primitives du service;
de paramètres associés à chaque événement et action de primitive, ainsi que de forme prise par ces paramètres; et
d’interaction entre ces événements et ces actions, ainsi que de séquences valides desdits événements et actions.

General Information

Status
Published
Publication Date
15-Mar-2023
Technical Committee
Drafting Committee
Current Stage
PPUB - Publication issued
Start Date
31-Mar-2023
Completion Date
16-Mar-2023
Ref Project

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IEC 61158-5-26 ®
Edition 2.0 2023-03
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 5-26: Application layer service definition – Type 26 elements

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IEC 61158-5-26 ®
Edition 2.0 2023-03
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 5-26: Application layer service definition – Type 26 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.70; 35.110 ISBN 978-2-8322-6581-9

– 2 – IEC 61158-5-26:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
1.1 General . 8
1.2 Specifications . 9
1.3 Conformance . 9
2 Normative references . 9
3 Terms, definitions, symbols, abbreviated terms and conventions . 11
3.1 Terms and definitions from other ISO/IEC standards . 11
3.1.1 Terms and definitions from ISO/IEC 7498-1 . 11
3.1.2 Terms and definitions from ISO/IEC 8822 . 11
3.1.3 Terms and definitions from ISO/IEC 9545 . 11
3.1.4 Terms and definitions from ISO/IEC 8824-1 . 12
3.2 Fieldbus application layer Type 26-specific definitions . 12
3.3 Abbreviated terms and symbols . 18
3.4 Conventions . 20
3.4.1 Overview . 20
3.4.2 General conventions . 20
3.4.3 Conventions for class definitions . 21
3.4.4 Conventions for service definitions . 22
4 Concepts . 23
5 Data type ASE . 23
5.1 Overview. 23
5.2 Formal definition of data type objects . 24
5.2.1 Data type class definitions . 24
5.2.2 Attributes . 25
5.3 FAL defined data types . 26
5.3.1 Fixed length types . 26
5.3.2 String types . 32
5.4 Data type ASE service specification . 33
6 Communication model specification . 33
6.1 General . 33
6.2 Protocol stack for Type 26 fieldbus . 33
6.3 Overview of Type 26 communication model . 34
6.4 Cyclic data communication service with Common-memory . 35
6.4.1 Overview . 35
6.4.2 Common–memory: allocation to each node . 36
6.4.3 Data sharing among nodes with the CM . 37
6.4.4 CM data type . 39
6.5 ASEs . 39
6.5.1 Overview of Type 26 ASEs . 39
6.5.2 Type 26 specific conventions for FAL service common parameters . 40
6.5.3 Cyclic-data ASE . 41
6.5.4 Message data ASE . 47
6.5.5 Load measurement ASE . 77
6.5.6 Network management ASE . 83

6.5.7 General purpose command server ASE . 97
6.5.8 AR ASE . 100
6.5.9 FAL ASE summary . 113
Bibliography . 116

Figure 1 – Protocol stack for Type 26 fieldbus . 34
Figure 2 – Unconfirmed Push-Publisher/Subscriber type interaction. 35
Figure 3 – Unconfirmed/Confirmed Client/Server type interaction. 35
Figure 4 – Common memory allocation . 37
Figure 5 – Data sharing with the CM . 38
Figure 6 – Node #01 for reception only . 38
Figure 7 – Node #01 without the CM . 39
Figure 8 − Data sharing among nodes with and without CM3 . 39
Figure 9 – The structure of ASEs for Type 26 FAL . 40
Figure 10 – Virtual-address-space for Byte block . 52
Figure 11 – Virtual-address-space for Word block . 54
Figure 12 – AR ASE internal architecture . 101
Figure 13 – Structure of IP address . 111

Table 1 – Write service parameters . 44
Table 2 – Send-CM service parameters . 45
Table 3 – Read service parameters . 45
Table 4 – Update memory service parameters . 46
Table 5 – Get- buffer service parameters . 47
Table 6 – Byte block read service parameters . 52
Table 7 – Byte block write service parameters . 53
Table 8 – Word block read service parameters . 54
Table 9 – Word block write service parameters . 55
Table 10 – Network parameter read service parameters . 56
Table 11 – Extended network parameter read service parameters . 57
Table 12 – Network parameter write service parameters . 58
Table 13 – Extended network parameter write service parameters . 59
Table 14 – Stop command service parameters . 60
Table 15 – Operation command service parameters . 60
Table 16 – profile read service parameters . 61
Table 17 – Transparent message service parameters . 63
Table 18 – Log data read service parameters . 64
Table 19 – Log data items . 64
Table 20 – Log data clear service parameters . 69
Table 21 – Message return service parameters . 70
Table 22 – Vendor specific message service parameters . 71
Table 23 – Set remote node configuration parameter service parameters . 72
Table 24 – Data elements and Node configuration parameters . 72

– 4 – IEC 61158-5-26:2023 © IEC 2023
Table 25 – Service parameters of Read remote participating node management
information parameter service . 73
Table 26 – Participating node management information parameters . 74
Table 27 – Read remote node management information parameter service parameters . 75
Table 28 – Node management information parameters . 76
Table 29 – Read remote node setting information parameter service parameters . 77
Table 30 – Node setting information parameters . 77
Table 31 – Start TK-holding-time measurement service parameters . 79
Table 32 – Terminate TK-holding-time measurement service parameters . 80
Table 33 – Token-holding-time measurement result . 81
Table 34 – Start GP_Comm sender l
...

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