IEC 61784-2-20:20 23定义了通信简档系列20(CPF 20)。CPF 20基于IEC 61158系列（类型25）、ISO/IEC/IEEE 8802-3和其他标准规定了一组实时以太网（RTE）通信简档（CPs）和相关网络组件。 对于每个RTE通信配置文件，本文档还指定了相关的RTE性能指标以及这些RTE性能指标之间的依赖性。 注1？所有CPs都基于IEC发布的标准或标准草案或国际标准，或者基于其他标准机构或开放标准流程建立的标准或国际标准。 注2？RTE通信简档使用ISO/IEC/IEEE 8802-3通信网络及其相关网络组件，并且在某些情况下修改这些标准以获得RTE特征。

IEC 61784-2-20:2023 defines Communication Profile Family 20 (CPF 20). CPF 20 specifies a set of Real-Time Ethernet (RTE) communication profiles (CPs) and related network components based on the IEC 61158 series (Type 25), 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 profiles use ISO/IEC/IEEE 8802-3 communication networks and its related network components and in some cases amend those standards to obtain RTE features.