Průmyslové komunikační sítě - Specifikace sběrnice pole - Část 4-24: Specifikace protokolu datového spoje - Prvky typu 24 (Norma k přímému použití jako ČSN). (Platnost do 2.5.2026).

The information about the standard:

Designation standards: ČSN EN IEC 61158-4-24-ed.2
Classification mark: 184020
Catalog number: 508336
Publication date standards: 1.12.2019
The number of pages: 134
Approximate weight : 433 g (0.95 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN

Annotation of standard text ČSN EN IEC 61158-4-24-ed.2 (184020):

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, or b) in an acyclic manner, as requested 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