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IEC 61158-4-22:2014 ed2.0
Industrial communication networks - Fieldbus specifications - Part 4-22: Data-link layer protocol specificationn - Type 22 elements
138 стр.
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Разработчик:
Зарубежные/IEC
ICS:
35.110 Networking. Including local area networks (LAN), metropolitan area networks (MAN), wide area networks (WAN), etc. / Организация сети, 35.100.20 Data link layer / Уровень звена данных, 25.040.40 Industrial process measurement and control / Измерение и контроль производственного процесса
Описание
IEC 61158-4-22:2014 specifies 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 the structure of the fieldbus 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 and constitutes a technical revision. The main changes are:
- Introduction of new topology scan PDUs;
- Bug fix of missing version field in some PDUs;
- Introduction of new Physical Link descriptors.