NF EN IEC 61158-3-12

Industrial communication networks - Fieldbus specifications - Part 3-12 : data link layer service definition - Type 12 elements

Le présent document fournit les éléments communs pour les communications de messagerie de base à temps critique entre des appareils dans un environnement d'automation. Le terme "à temps critique" sert à représenter la présence d'une fenêtre temporelle, dans les limites de laquelle une ou plusieurs actions spécifiées sont tenues d'être parachevées avec un certain niveau défini de certitude. Le manquement à parachever les actions spécifiées dans les limites de la fenêtre temporelle risque d'entraîner la défaillance des applications qui demandent ces actions, avec le risque concomitant pour l'équipement, l'installation et éventuellement pour la vie humaine.

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