Каталог стандартов

+7 (495) 223-46-76 +7 (812) 309-78-59
inform@normdocs.ru

ÖVE/ÖNORM EN 61158-4-12:2015-11

Заменен
Industrial communication networks - Fieldbus specifications -- Part 4-12: Data-link layer protocol specification - Type 12 elements (IEC 61158-4-12:2014) (english version)
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, 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.
ICS
35.110 Networking. Including local area networks (LAN), metropolitan area networks (MAN), wide area networks (WAN), etc. / Организация сети
35.100.20 Data link layer / Уровень звена данных
25.040.40 Industrial process measurement and control / Измерение и контроль производственного процесса