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IEC 61158-5-12-ed.4.0
Industrial communication networks - Fieldbus specifications - Part 5-12: Application layer service definition - Type 12 elements
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STANDARD published on 10.4.2019
The information about the standard:
Designation standards: IEC 61158-5-12-ed.4.0
Publication date standards: 10.4.2019
SKU: NS-945667
Approximate weight : 300 g (0.66 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Industrial process measurement and controlApplication layerNetworking
Annotation of standard text IEC 61158-5-12-ed.4.0 :
IEC 61158-5-12:2019 defines the services provided to the FAL user at the boundary between the user and the application layer of the fieldbus reference model, and Systems Management at the boundary between the application layer and Systems Management of the fieldbus reference model. This standard specifies the structure and services of the IEC fieldbus application layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545). This fourth edition cancels and replaces the third edition published in 2014 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: •Technical corrections; and •Editorial improvements for clarification
L’IEC 61158-5-12:2019 fournit des elements communs pour les communications de messagerie prioritaires et non prioritaires elementaires entre les programmes d’application des environnements d’automatisation et le materiel specifique au bus de terrain de type 12. On utilise le terme "prioritaire" pour traduire la presence d’une fenetre temporelle, a l’interieur de laquelle il est exige qu’une ou plusieurs actions specifiees soient realisees selon un certain niveau de certitude. Si les actions specifiees ne sont pas realisees dans la fenetre temporelle, les applications demandant les actions risquent de connaitre une defaillance, avec les risques que cela comporte pour les equipements, les installations et eventuellement la vie humaine.
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