IEC61784-3:2017安全通信协议设计与残余差错率计算  

Safety Communication Protocol Design and Residual Error Rate Calculation of IEC61784-3:2017

作　　者：王飞 舒四海 桑小田 Wang Fei;Shu Sihai;Sang Xiaotian(Hanwei Electronics Group Corporation,Zhengzhou 450001,Henan)

机构地区：[1]汉威科技集团股份有限公司,河南郑州450001

出　　处：《电气防爆》2021年第1期1-7,共7页Electric Explosion Protection

摘　　要：IEC 61508-2:2010标准7.4.11章节中指出,当数据通信用于执行一个安全功能时,应考虑传输错误如重复、丢失、插入、不正确序列、数据错误、延时、伪装和寻址,并估算通信过程中的失效量(例如残余错误率)。IEC61784-3:2017标准针对上述通信错误定义了几种通信模型和总线通信残余错误率的计算公式。Section 7.4.11 of the standard IEC 61508-2:2010 pointed out that when data communication is used to perform a security function,transmission errors such as repetition,loss,insertion,incorrect sequence,data error,delay,camouflage and addressing should be considered,and the amount of failure in the communication process(such as residual error rate)should be estimated.The standard IEC 61784-3:2017 defines several communication models and calculation formulas for the residual error rate of bus communication for the above-mentioned communication errors.

关 键 词：IEC61508:2010 残余错误率 IEC61784-3:2017 安全功能 通信错误 

分 类 号：TN91[电子电信—通信与信息系统]