To study the different industrial applications of PLC through ladder diagrams

PLC has evolved as an important controller in industries these days because of its simplicity and robustness. It is used for controlling many mechanical movements of the heavy machines or to control the voltage and frequency of the power supplies. In this project, study of the PLC has been done in great detail and also several industrial applications have been studied and realized through ladder diagrams. These ladder diagrams are simulated in either PLC trainer or PLC simulator software. Matlab /Simulink is also used for realizing physical situations as in case of dc motor and power inverter. The applications on which we have stressed are the continuous bottle filling system, batch-mixing system, speed control of dc motor,3 stage air conditioning system, control of planar machine and the automatic frequency control of the supply, during induction heating