IEC 61158-4-21:2023

Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements

IEC 61158-4-21:2023 describes:
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 data link service provider;
procedures for giving communication opportunities based on ISO/IEC/IEEE 8802‑3 MAC, with provisions for nodes to be added or removed during normal operation;
structure of the fieldbus data link protocol data units (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 4-21: Spécification du protocole de la couche liaison de données - Éléments de type 21

L'IEC 61158-4-21:2023 décrit:
des procédures de transfert en temps opportun de données et d’informations de commande d’une entité utilisateur de liaison de données à une entité utilisateur homologue ainsi qu’entre entités de liaison de données qui constituent le fournisseur de services distribués de la liaison;
des procédures offrant des moyens de communication fondées sur la commande d’accès au support (MAC) de l’ISO/IEC/IEEE 8802‑3, ainsi que des dispositions permettant d’ajouter et de retirer des nœuds au cours du fonctionnement normal;
la structure des unités de données de protocole de liaison de données (DLPDU) de bus de terrain utilisées pour le transfert des données et les informations de commande par le protocole objet du présent document, ainsi que leur représentation en tant qu’unités de données d’interface de couche 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 61158-4-21:2019 - Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61158-4-21
®

Edition 3.0 2023-03
INTERNATIONAL
STANDARD

Industrial communication networks – Fieldbus specifications –
Part 4-21: Data-link layer protocol specification – Type 21 elements
IEC 61158-4-21:2023-03(en)

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IEC 61158-4-21

®


Edition 3.0 2023-03




INTERNATIONAL



STANDARD



















Industrial communication networks – Fieldbus specifications –

Part 4-21: Data-link layer protocol specification – Type 21 elements


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-6555-0




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– 2 – IEC 61158-4-21:2023 © 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 . 10
1.5 Conformance . 10
2 Normative references . 11
3 Terms, definitions, symbols and abbreviated terms . 11
3.1 Reference model terms and definitions . 11
3.2 Service convention terms and definitions . 13
3.3 Common terms and definitions .
...