61158-5-9-2014
Industrial communication networks – Fieldbus specifications – Part 5-9: Application layer service definition – Type 9 elements (Edition 2.0)

Réseaux de communication industriels – Spécifications des bus de terrain – Partie 5-9: Définition des services de la couche application – Eléments de type 9 (Edition 2.0)


 

 

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标准号
61158-5-9-2014
发布日期
2014年08月01日
实施日期
2014年08月20日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
IEC - International Electrotechnical Commission
引用标准
252
适用范围
"General The 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 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 9 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. This standard defines in an abstract way the externally visible service provided by the different Types of the fieldbus Application Layer in terms of"




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