Research on distributed I/O redundancy method based on domestic PLC

Dianzi Jishu Yingyong

Su Shishi¹  Han Qingmin²  Liu Xuefei²  Wu Yunfeng²  Kuai Liang²  Wang Shuai² 

[1] CS＆S.Information System Engineering Co.，Ltd.，Beijing 102209，China;The 6th Research Institute of China Electronics Corporation，Beijing 102209，China;

关键词: programmable logic controller(plc);    reliability;    i/o redundancy;    fault diagnosis;   

DOI  :  10.16157/j.issn.0258-7998.200588

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown