IEC 61158-5-17-ed.1.0

Annotation of standard text IEC 61158-5-17-ed.1.0 :

IEC 61158-5-17:2007 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 standard 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 17 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. It includes the following significant changes with respect to the previous edition deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market relevance; addition of new types of fieldbuses; division of this part into multiple parts numbered. LIEC 61158-5-17:2007 definit les services fournis a: lutilisateur de FAL a la frontiere entre lutilisateur et la Couche Application du modele de reference de bus de terrain; et la Gestion des systemes au niveau de la frontiere entre la Couche Application et la Gestion des systemes selon le Modele de reference de bus de terrain. Elle specifie la structure et les services de la Couche Application des bus de terrain CEI, en conformite avec le Modele de reference de base de lOSI (ISO/CEI 7498) et la Structure de la couche application de lOSI (ISO/CEI 9545). La presente premiere edition et ses parties connexes de la sous-serie CEI 61158-5 annulent et remplacent la CEI 61158 5:2003. Cette edition de la presente partie constitue un supplement technique. La presente partie et ses parties compagnes Type 17 annulent et remplacent la CEI/PAS 62405. Elle inclut les modifications suivantes: suppression du precedent bus de terrain Type 6 en raison du manque de pertinence commerciale; ajout de nouveaux types de bus de terrain; division de la Partie 5 de la troisieme edition en plusieurs parties numerotees -5 2, -5 3, La presente version bilingue (2014-06) correspond a la version anglaise monolingue publiee en 2007-12.