本标准为IEC 61158-4-4-2014，标准的英文名称为Industrial communication networks - Fieldbus specifications - Part 4-4: Data-link layer protocol specificationn - Type 4 elements，本标准在2014-08-15发布，在2014-08-15开始实施。
IEC 61158-4-4:2014 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 2007 and constitutes a technical revision. The main changes are: editorial improvements and editorial corrections.
本标准文件共有102页。 IEC 61158-4-4-2014 Industrial communication networks - Fieldbus specifications - Part 4-4_ Data-link layer protoco.pdf(1.58 MB)
