Průmyslové komunikační sítě - Specifikace sběrnice pole - Část 4-3: Specifikace protokolu datového spoje - Prvky typu 3 (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN IEC 61158-4-3-ed.4
Classification mark: 184020
Catalog number: 508299
Publication date standards: 1.12.2019
The number of pages: 182
Approximate weight : 577 g (1.27 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN

Annotation of standard text ČSN EN IEC 61158-4-3-ed.4 (184020):

data-link layer provides basic time-critical messaging communications between devices in an automation environment. This protocol provides communication opportunities to a pre-selected "master" subset of data-link entities in a cyclic asynchronous manner, sequentially to each of those data-link entities. Other data-link entities communicate only as permitted and delegated by those master data-link entities. For a given master, its communications with other data-link entities can be cyclic, or acyclic with prioritized access, or a combina-tion of the two. This protocol provides a means of sharing the available communication resources in a fair manner. There are provisions for time synchronization and for isochronous operation