Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 24 elements
Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 24 elements
Мы хотим включить аналитику посещений, чтобы понимать, что искать людям на сайте. Без вашего согласия счётчики не загружаются. Политика конфиденциальности
1 Scope
1.1 General 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, 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.
Другие стандарты BS