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Industrial communication networks - Fieldbus specifications - Part 3-24: Data-link layer service definition - Type 24 elements
Industrial communication networks - Fieldbus specifications - Part 3-24: Data-link layer service definition - Type 24 elements
IEC 61158-3-24:2023 provides common elements for basic **time-critical messaging communications** between devices in an automation environment.
The term "time-critical" is used to represent the presence of a time-window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time-window risks failure of the applications requesting the actions, with attendant risk to equipment, plant and possibly human life.
This document defines in an abstract way the externally visible service provided by the Type 24 fieldbus data-link layer in terms of:
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