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IEC 61158-4-4:2019

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

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Kehtiv alates 18.04.2019
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Standardi ajalugu
Staatus
Kuupäev
Tüüp
Nimetus
18.04.2019
Põhitekst
15.08.2014
Põhitekst
IEC 61158-4-4:2019 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 third edition cancels and replaces the second edition published in 2014 and constitutes a technical revision. The main changes include the following significant technical changes with respect to the previous edition: a) additional user parameters to services; b) additional services to support distributed objects;c) additional secure services
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