Industrial communication networks - Fieldbus specifications - Part 4-12: Data-link layer protocol specification - Type 12 elements
STANDARD published on 1.12.2019
Designation standards: ČSN EN IEC 61158-4-12-ed.4
Classification mark: 184020
Catalog number: 508303
Publication date standards: 1.12.2019
The number of pages: 154
Approximate weight : 493 g (1.09 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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, 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