工业网络.配置文件.第2-21部分:基于ISO/IEC/IEEE 8802-3-CPF 21的附加实时现场总线配置文件

[中文适用范围]： 本标准适用于工业网络中的实时通信配置文件，特别是基于ISO/IEC/IEEE 8802-3标准的附加实时现场总线配置文件。它涵盖了物理层、数据链路层、应用层等方面的技术要求，并提供了性能指标的选择方法。 [外文原描述]： IEC 61784-2-21:2023 defines Communication Profile Family 21 (CPF 21). CPF 21 specifies a Real-Time Ethernet (RTE) communication profile (CP) and related network components based on the IEC 61158 series (Type 26), ISO/IEC/IEEE 8802‑3 and other standards. For each RTE communication profile, this document also specifies the relevant RTE performance indicators and the dependencies between these RTE performance indicators. NOTE 1 All CPs are based on standards or draft standards or International Standards published by the IEC or on standards or International Standards established by other standards bodies or open standards processes. NOTE 2 The RTE communication profile uses ISO/IEC/IEEE 8802‑3 communication networks and its related network components and in some cases amend those standards to obtain RTE features.