标准摘要
[中文适用范围]： 本文件规定了基于数字接口（SDCI）的工业网络的单点数字通信接口的功能安全扩展。它定义了物理层、数据链路层、主配置管理器以及FS设备（安全设备）和FS主站（安全主站）的扩展功能，以实现功能安全通信。该标准适用于需要功能安全扩展的工业网络系统，包括安全输入/输出模块、安全主站以及相关的安全通信层服务。 [外文原描述]： IEC 61139-2:2022 specifies the extensions to SDCI in IEC 61131-9 for functional safety. This comprises: • a standardized OSSDe interface for redundant switching signals based on IEC 61131-2, • minor modifications/extensions to state machines of SDCI to support the safety operations, • a lean functional safety communication protocol on top of the standard SDCI communication which is a black channel according to IEC 61784-3:2021, • protocol management functions for configuration, parameterization, and commissioning, • IODD extensions for functional safety, • a Device tool interface to support Dedicated Tools according to functional safety standards. This document does not cover: • communication interfaces or systems including multi-point or multi-drop linkages, • communication interfaces or systems including multi-channel or encrypted linkages, • wireless communication interfaces or systems, • integration of SDCI-FS into upper-level systems such as fieldbuses/FSCPs.
英文名称Industrial networks - Single-drop digital communication interface - Part 2: Functional safety extensions