WANG Qianjin, MA Xiaoping, ZHANG Shoutia. Application of PLC soft redundancy in monitoring and control system for ventilator[J]. Journal of Mine Automation, 2014, 40(1): 93-96. DOI: 10.13272/j.issn.1671-251x.2014.01.025
Citation: WANG Qianjin, MA Xiaoping, ZHANG Shoutia. Application of PLC soft redundancy in monitoring and control system for ventilator[J]. Journal of Mine Automation, 2014, 40(1): 93-96. DOI: 10.13272/j.issn.1671-251x.2014.01.025

Application of PLC soft redundancy in monitoring and control system for ventilator

  • In view of safety problem existed in monitoring and control system for ventilator that uses a single PLC to control operation, a scheme of software redundancy composed by two PLCs was proposed in the paper. One PLC is used as master station, controls the ventilator control system, and carries out non-redundant program which does not need data synchronization process and completes redundancy program of control functions, alarm, analog; and the other PLC is used as reserve station to perform only non-redundancy program. The application of PLC software redundancy system improves reliability of monitoring and control system for ventilator, and meets needs of safety production.
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