Průmyslové komunikační sítě - Specifikace sběrnice pole - Část 5-23: Definice služby aplikační vrstvy - Prvky typu 23 (Norma k přímému použití jako ČSN). (Platnost do 13.4.2026).
NORMA vydaná dňa 1.12.2019
Označenie normy: ČSN EN IEC 61158-5-23-ed.2
Rozlišovací znak: 184020
Katalógové číslo: 508322
Dátum vydania normy: 1.12.2019
Počet strán: 104
Približná hmotnosť: 343 g (0.76 libier)
Krajina: Česká technická norma
Kategória: Technické normy ČSN
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 23 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