DIN EN 61158-6-14-2013 工业通讯网络.现场总线规范.第6-14部分:应用层协议规范.14型元件(IEC 61158-6-14-2010).英文版本EN 61158-6-14-2012,仅为CD-ROM
Industrial communication networks - Fieldbus specifications - Part 6-14: Application layer protocol specification - Type 14 elements (IEC 61158-6-14:2010); English version EN 61158-6-14:2012, only on CD-ROM
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 14 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.