ČSN EN IEC 61158-5-19-ed.4

Industrial communication networks - Fieldbus specifications - Part 5-19: Application layer service definition - Type 19 elements

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Podrobné informácie

Označenie: ČSN EN IEC 61158-5-19-ed.4

Dátum vydania: 01.12.2019

Stránok: 44

Krajina: Česká technická norma

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Anotácia

fieldbus application layer (FAL) provides user programs with a means to access the fieldbus communication environment. In this respect, the FAL can be viewed as a "window between corresponding application programs." This part of IEC 61158 provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment and material specific to Type 19 fieldbus. 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

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