标准摘要
[中文适用范围]： 本标准定义了工业通信网络中现场总线的应用层服务，特别适用于类型2元素的应用层服务定义。内容包括通用概念、数据类型定义、通信模型规范等，适用于工业自动化领域的通信系统设计和实现。 [外文原描述]： IEC 61158-5-2:2023 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 2 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.
英文名称Industrial communication networks - Fieldbus specifications - Part 5-2: Application layer service definition - Type 2 elements