Industrial communication networks - Fieldbus specifications - Part 4-12: Data-link layer protocol specification - Type 12 elements
NORM herausgegeben am 1.12.2019
Bezeichnung normen: ČSN EN IEC 61158-4-12-ed.4
Zeichen: 184020
Katalog-Nummer: 508303
Ausgabedatum normen: 1.12.2019
Zahl der Seiten: 154
Gewicht ca.: 493 g (1.09 Pfund)
Land: Tschechische technische Norm
Kategorie: Technische Normen 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