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

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 articl...

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Veröffentlicht in:Diànzǐ jìshù yīngyòng 2021-04, Vol.47 (4), p.82-86
Hauptverfasser: Liu Xuefei, Su Shishi, Kuai Liang, Han Qingmin, Wang Shuai, Wu Yunfeng
Format: Artikel
Sprache:chi
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Zusammenfassung: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.
ISSN:0258-7998
DOI:10.16157/j.issn.0258-7998.200588