Application of SFC Programming Method in Monitoring and Control System of Coal Mine Belt Conveyor

In view of problems of long program cycle, poor readability and difficult programm maintenance because of using empirical method to design PLC program of monitoring and control system of coal mine belt conveyor, the paper proposed a scheme of using SFC programming method to design ladder of monitoring and control system of coal mine belt conveyor. The practice showed that the scheme has characteristics of convenient design, good readatility, easy maintenance and so on.