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Full Description

The data-link layer provides basic time-critical messaging communications between devices in an automation environment.

This protocol provides communication opportunities to all participating data-link entities

a) in a synchronously-starting cyclic manner, according to a pre-established schedule, and
b) in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities.

Thus this protocol can be characterized as one which provides cyclic and acyclic access asynchronously but with a synchronous restart of each cycle.

Cross References:
ISO/IEC/IEEE 8802-3:2017
ISO/IEC 10731
IEEE Std 802.1D
IEEE Std 802.1Q
ISO/IEC 7498-1
ISO/IEC 7498-3
IEC 61158-1:2019
BS EN IEC 61158-1:2019


All current amendments available at time of purchase are included with the purchase of this document.