Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 2 elements not-for-sale Adhering to the specifications under

Adhering to the specifications under BS EN 4604-008

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Industrial communication networks. Fieldbus specifications - Data-link layer protocol specification. Type 2 elements not-for-sale Adhering to the specifications under1 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, sequentially and in a cyclic synchronous manner. Foreground scheduled access is available for time critical activities together with background unscheduled access for less critical activities. Deterministic and