Application of PLC technology in mechanical and electrical equipment of coal mines
In order to better promote the application of PLC technology in the mechanical and electrical equipment,the data collection,control program and control output functions of PLC technology were analyzed,and its application in power supply system,ventilation system,lifting system and transportation system was studied.The results show that the PLC can calculate the signal,and the calculated voltage greater than 1.2 U is overvoltage,and less than 0.8 U is undervoltage.If the calculat-ed current is 6 times of greater than the rated current,it is a short circuit,and it is overloaded between 1.2～6 times.PLC can constantly monitors the operating status of elevator to ensure it is operating normally.PLC can monitor the voltage,cur-rent,operating power and other parameters of the fan in real time to ensure its normal operation.
coal mine mechanical and electrical equipmentPLCdata collectionpower supply systemventilation systemtransportation system
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