IEC 61158-4-24:2023

Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements

IEC 61158-4-24:2023 provides
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 datalink service provider;
procedures for giving communications opportunities to all participating DL-entities (DLEs), sequentially and in a cyclic manner for deterministic and synchronized transfer at cyclic intervals up to 64 ms;
procedures for giving communication opportunities available for time-critical data transmission together with non-time-critical data transmission without prejudice to the time-critical data transmission;
procedures for giving cyclic and acyclic communication opportunities for time-critical data transmission with prioritized access;
procedures for giving communication opportunities based on ISO/IEC/IEEE 8802‑3 medium access control, with provisions for nodes to be added or removed during normal operation;
the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this document, and their representation as physical interface data units.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-24: Spécification du protocole de la couche liaison de données - Éléments de type 24

L'IEC 61158-4-24:2023 spécifie:
les procédures de transfert en temps opportun des données et des informations de commande entre une entité utilisateur de liaison de données et une entité utilisateur homologue et, parmi les entités de liaison de données formant le fournisseur de services distribués de liaison de données;
les procédures pour donner des opportunités de communication à toutes les entités DL participantes (DLE), séquentiellement et de manière cyclique pour un transfert déterministe et synchronisé à des intervalles cycliques jusqu’à 64 ms;
les procédures pour donner les opportunités de communication disponibles pour la transmission de données prioritaires ainsi que pour la transmission de données non prioritaires, sans nuire à la transmission de données prioritaires;
les procédures pour donner des opportunités de communication cyclique et acyclique pour la transmission de données prioritaires avec accès hiérarchisés;
les procédures pour donner des opportunités de communication selon le contrôle d’accès au support physique normalisé par l’ISO/IEC/IEEE 8802‑3, avec des dispositions pour les nœuds à ajouter ou à retirer lors du fonctionnement normal;
la structure des DLPDU de bus de terrain utilisée par le protocole du présent document pour le transfert des données et des informations de commande, et leur représentation sous forme d’unités de données d’interface physique.

General Information

• Status: Published
• Publication Date: 27-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
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 31-Mar-2023
• Completion Date: 28-Mar-2023

Relations

• Revises: IEC 61158-4-24:2019 - Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61158-4-24 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-24: Data-link layer protocol specification – Type 24 elements
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IEC 61158-4-24 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –

Part 4-24: Data-link layer protocol specification – Type 24 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6556-7

– 2 – IEC 61158-4-24:2023 © IEC 2023
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
1.1 General . 10
1.2 Specifications . 10
1.3 Procedures . 10
1.4 Applicability . 11
1.5 Conformance . 11
2 Normative references . 11
3 Terms, definitions, symbols, abbreviated terms and conventions . 12
3.1 Reference model terms and definitions . 12
3.2 Service convention terms and definitions . 13
3.3 Common terms and definitions . 13
3.4 Symbols and abbreviations . 16
3.5 Additional Type 24 symbols and abbreviations . 16
3.6 Common conventions . 16
3.7 Additional Type 24 conventions. 17
3.7.1 Primitive conventions . 17
3.7.2 State machine conventions . 17
4 Overview of DL-protocol . 18
4.1 Characteristic feature of the DL-protocol . 18
4.2 DL layer component . 19
4.2.1 Cyclic transmission control (CTC) . 20
4.2.2 Send receive control (SRC) . 20
4.2.3 DL-management . 20
4.3 Timing sequence . 20
4.3.1 Overview . 20
4.3.2 Cyclic transmission mode . 20
4.3.3 Acyclic transmission mode . 34
4.4 Service assumed from the PhL. 34
4.4.1 General requirement . 34
4.4.2 DL_Symbols . 34
4.4.3 Assumed primitives of the PhS . 35
4.5 Local parameters, variables, counters, timers . 35
4.5.1 Overview . 35
4.5.2 Variables, parameters, counters and timers to support DLE function. 35
5 DLPDU structure . 40
5.1 Overview. 40
5.1.1 Transfer syntax for bit sequences . 40
5.1.2 Data type encodings . 41
5.1.3 Frame format . 41
5.2 Basic format DLPDU structure . 41
5.2.1 General . 41
5.2.2 Synchronous frame . 45
5.2.3 Output data or Input data frame . 46
5.2.4 Delay measurement start frame . 46

5.2.5 Delay measurement frame . 47
5.2.6 Message token frame . 47
5.2.7 Status frame . 48
5.2.8 Cycle Information frame . 49
5.2.9 Message frame . 50
5.3 Short format DLPDU structure . 51
5.3.1 General . 51
5.3.2 Synchronous frame . 53
5.3.3 Output data or Input data frame . 53
5.3.4 Message frame . 54
5.4 Short format II DLPDU structure . 54
5.4.1 General . 54
5.4.2 Asynchronous frame . 56
5.4.3 Synchronous frame . 57
5.4.4 Output data or Input data frame . 57
6 DLE element procedure . 58
6.1 Overview. 58
6.2 Cyclic transmission control sublayer . 58
6.2.1 General . 58
6.2.2 DLS-user interface . 58
6.2.3 Protocol machines in CTC . 59
6.2.4 CTC-DLM interface . 112
6.3 Send Receive Control . 113
6.3.1 General . 113
6.3.2 SRC-CTC interface . 114
6.3.3 Detailed specification of SRC . 114
6.3.4 SRC-DLM interface . 119
7 DL-management layer (DLM) . 120
7.1 Overview. 120
7.2 Primitive definitions . 120
7.2.1 Primitives exchanged between DLMS-user and DLM . 120
7.2.2 Parameters used with DLM primitives . 121
7.3 DLM protocol machine . 121
7.3.1 C1 master . 121
7.3.2 Slave and C2 master . 126
7.4 Functions . 130
7.5 DLM protocol machine for no time slot type . 131
7.5.1 C1 master . 131
7.5.2 C2 master and Slave . 133
7.6 Functions for no time slot type . 134
Bibliography . 135

Figure 1 – Data-link layer component . 20
Figure 2 – Timing chart of fixed-width time slot type cyclic communication . 21
Figure 3 – Timing chart of configurable time slot type cyclic communication . 23
Figure 4 – Schematic diagram of cyclic event occurrence . 25
Figure 5 – Timing relationship between cyclic transmission and data processing . 28

– 4 – IEC 61158-4-24:2023 © IEC 2023
Figure 6 – Timing chart of no time slot type cyclic communication (Master send
common address) . 28
Figure 7 – Timing chart for multiple transmission cycle setting . 29
Figure 8 – Timing chart for multiple transmission cycle setting igure title . 30
Figure 9 – Schematic diagram for connection.
...