EN IEC 61158-4-21:2023由欧洲电工标准化委员会 IX-CENELEC 发布于 2023-05-12,并于 2023-08-02 (7) 实施,于 2026-05-02 (7) 废止。
EN IEC 61158-4-21:2023在国际标准分类中归属于: 25.040.40 工业过程的测量和控制。
EN IEC 61158-4-21:2023 工业通信网络 现场总线规范 第4-21部分:数据链路层协议规范 类型 21 元素的最新版本是哪一版?
最新版本是 EN IEC 61158-4-21:2023 。
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.
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