BS EN 61158-4-17:2008 PDF

What is BS EN 61158-4-17 - Type 17 elements of data-link layer protocol about?

BS EN 61158-4-17 is part of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the “three-layer” fieldbus reference model described in IEC 61158-1 . The data-link layer provides basic time-critical messaging communications between devices in an automation environment. BS EN 61158-4-17 provides communication opportunities to all participating data-link entities:

In a cyclic asynchronous manner, sequentially to each of those data-link entities, and In a synchronous manner, either cyclically or acyclically, according to a pre-established schedule.

BS EN 61158-4-17 protocol also provides means of changing the set of participating data-link entities and of modifying the set of scheduled communications opportunities. When the set of scheduled communications opportunities is null, the distribution of communication opportunities to the participating data-link entities is completely asynchronous. Thus BS EN 61158-4-17 can be characterized as one which provides access asynchronously but with a synchronous overlay.

Who is BS EN 61158-4-17 - Type 17 elements of data-link layer proto...