中圖分類號： TN108；TP273 文獻標識碼： A DOI：10.16157/j.issn.0258-7998.200588 中文引用格式： 劉雪飛,，蘇師師,，蒯亮，等. 基于國產PLC的分布式I/O冗余方法研究[J].電子技術應用,，2021,，47(4)：82-86. 英文引用格式： Liu Xuefei，Su Shishi,，Kuai Liang,，et al. Research on distributed I/O redundancy method based on domestic PLC[J]. Application of Electronic Technique，2021,，47(4)：82-86.
Research on distributed I/O redundancy method based on domestic PLC
Liu Xuefei1,，Su Shishi2，Kuai Liang1,，Han Qingmin1,，Wang Shuai1，Wu Yunfeng1
1.The 6th Research Institute of China Electronics Corporation,，Beijing 102209,，China； 2.CS＆S.Information System Engineering Co.,，Ltd.,，Beijing 102209，China
Abstract： In order to improve the reliability of the acquisition/output link in the PLC control system, the design principle of the redundant system is analyzed, combined with the field application environment and actual needs, a distributed I/O redundancy method based on domestic PLC is developed. The article introduces the digital input/output and analog input/output redundancy schemes respectively for the type of data collected. This method takes the self-diagnosis results of the self-diagnosis periodically during operation as the basis for redundant diagnosis, combined with the user-configured redundancy scheme to improve accuracy of collecting/outputting data. It can be known from experiments and on-site base application that this method improves the reliability of the PLC control system and can ensure that the PLC system operates stably, efficiently and safely for a long time.
Key words : programmable logic controller(PLC),；reliability,；I/O redundancy,；fault diagnosis
