IEC 61158-5-4-2019 工业通信网络 现场总线规范--第5-4部分:应用层服务定义--类型4要素 Industrial communication networks - Fieldbus specifications - Part 5-4: Application layer service definition - Type 4 elements
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- 标准编号:IEC 61158-5-4-2019
- 标准状态:现行
- 更新时间:2023-08-12
- 下载次数:次
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 part of IEC 61158 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 4 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.dition 3.0 2019-04
INTERNATIONAL
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Industrial communication networks – Fieldbus specifications –
Part 5-4: Application layer service definition – Type 4 elements
IEC 61158-5-4:2019-04(en)
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