DIN EN 61158-5-7:2008
工业通讯网络.现场总线规范.第5-7部分:应用层设备定义.7型元件.仅为CD-ROM

Industrial communication networks - Fieldbus specifications - Part 5-7: Application layer service definition - Type 7 elements (IEC 61158-5-7:2007); English version EN 61158-5-7:2008, only on CD-ROM

标准号

DIN EN 61158-5-7:2008

发布

2008年

发布单位

德国标准化学会

当前最新

DIN EN 61158-5-7:2008

 

 

引用标准

IEC 60559 IEC 61158-3-7 IEC 61158-4-7 IEC/TR 61158-1 ISO/IEC 10731 ISO/IEC 7498-1 ISO/IEC 7498-3 ISO/IEC 8822 ISO/IEC 8824 ISO/IEC 9545

被代替标准

DIN EN 61158-500:2006 DIN EN 61158-5:2005

适用范围

This standard provides common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment. The term “timecritical” 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 Type 7 fieldbus Application Layer in terms of a) an abstract model for defining application resources (objects) capable of being manipulated by users via the use of the FAL service, b) the primitive actions and events of the service; c) the parameters associated with each primitive action and event, and the form which they take; and d) the interrelationship between these actions and events, and their valid sequences. The purpose of this standard is to define the services provided to 1) the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and 2) 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) and the OSI Application Layer Structure (ISO/IEC 9545). The principal objective of this standard is to specify the characteristics of conceptual application layer services suitable for time-critical communications, and thus supplement the OSI Basic Reference Model in guiding the development of application layer protocols for time-critical communications. A secondary objective is to provide migration paths from previously-existing industrial communications protocols. It is this latter objective which gives rise to the diversity of services standardized as the various types of IEC 61158. This specification may be used as the basis for formal application programming interfaces. Nevertheless, it is not a formal programming interface, and any such interface will need to address implementation issues not covered by this specification, including a) the sizes and octet ordering of various multi-octet service parameters, and b) the correlation of paired request and confirm, or indication and response, primitives

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