Standard

IEC 61158-4-21:2019 ED2

Apr 2019 Revised

Note: Latest version: IEC 61158-4-21:2023 ED3

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Abstract

IEC 61158-4-21:2019 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 and procedures for giving communication opportunities based on standard ISO/IEC 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 standard, and their representation as physical interface data units. This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. The main changes are: • added Frame control Value, DLM function and DLL constants; • changed NCM_RETRY_RNMS to NCM_CHECK_NET_INTEGRITY_REQ; • updated DLM state table; • miscellaneous editorial corrections.

Products specifications

Standard from IEC
Published: April 10 2019
Withdrawn: March 28 2023
Edition: 2
Document type: IS
Pages
ISBN: 9782832267776

Publisher: IEC
Distributor: IEC
ICS: 25.040.40
ICS: 35.100.20
ICS: 35.110
International TC: TC 65/SC 65C

Product Relations

Revised by: IEC 61158-4-21:2023 ED3
Adopted by: NF EN IEC 61158-4-21:2019
Revises: IEC 61158-4-21:2010 ED1

IEC 61158-4-21:2019 ED2

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IEC 61158-4-21:2023 ED3