1.1 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 8 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. 1.2 Specifications The principal objective of this standard is to specify the syntax and behavior of the application layer protocol that conveys the application layer services defined in IEC 61158-5-8. 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 protocols standardized in the IEC 61158-6 series. 1.3 Conformance This standard does not specify individual implementations or products, nor does it constrain the implementations of application layer entities within industrial automation systems.Conformance is achieved through implementation of this application layer protocol specification.
IEC 61158-6-8-2007由国际电工委员会 IX-IEC 发布于 2007-12。
IEC 61158-6-8-2007 在中国标准分类中归属于: N18 工业控制机与计算技术应用装置,P76 通信工程,在国际标准分类中归属于: 25.040.40 工业过程的测量和控制,35.100.70 应用层,35.160 微处理机系统。
* 在 IEC 61158-6-8-2007 发布之后有更新,请注意新发布标准的变化。
IEC 61158-6-8-2007 工业通讯网络.现场总线规范.第6-8部分:应用层协议规范.8型元件 由 IEC 61158-6-2003 变更而来。
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