The data-link layer provides basic time-critical messaging communications between devices in an automation environment.
This protocol provides a means of connecting devices through a partial mesh network, such that most failures of an interconnection between two devices can be circumvented. In common practice the devices are interconnected in a non-redundant hierarchical manner reflecting application needs
ABANDON
IEC 61158-4-4/FRAGF ED3
30.97
End of interruption of work - split/merged
Dec 15, 2020
