Industrial communication networks - Fieldbus specifications - Part 3-28: Data-link layer service definition - Type 28 elements
工业通信网络.现场总线规范.第3-28部分:数据链路层服务定义.28型元件
IEC 61158-3-28:2023 describes basic packet communication services and models in an automation control industrial field environment. The Type 28 data-link layer provides time-critical and non-time-critical communication services. Time-critical refers to the requirement to complete specified functions between devices in a defined time window in an industrial field environment. Failure to complete specified functions within the time window can lead to failure or harm in industrial production.