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，特别是类型23元素的相关服务定义。它适用于工业自动化系统中设备之间的通信，涵盖了通信模型、数据类型、同步机制等内容。 [外文原描述]： IEC 61158-5-25:2023 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 23 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 5-23: Application layer service definition - Type 23 elements