NEN EN IEC 61158-4-7 : 2008 C1 2014
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The latest, up-to-date edition.
INDUSTRIAL COMMUNICATION NETWORKS - FIELD BUS SPECIFICATIONS - PART 4-7: DATA-LINK LAYER PROTOCOL SPECIFICATION - TYPE 7 ELEMENTS
01-12-2013
Defines basic time-critical messaging communications between devices in an automation environment. It also provides communication opportunities to all participating data-link entities in a synchronously-starting cyclic manner, according to a pre-established schedule, and in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities.
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