Automated Car Parking System using PLC and SCADA System

PLC or Programmable logic controller is used to control system using specific functions. Basic PLC functions such as timing, sequencing, controlling and relaying are implemented. The scope of this project is to control the car parking using PLC and HMI application. The system is able to sense the presence of the vehicles standing at the main car parking gate using through beam sensor and it is counted using limit switch. These through beam sensors give their output to the PLC (programmable logic controller). Due to lack of parking spaces and skilled labour, there is a global shift towards the automatic car parking system to calculate accurate space available for car. In practical situations sensors (Through beam sensor) are used to detect presence of vehicles in a parking slot which send an interrupt signal to the control unit. In PLC the status of the sensors will be checked and certain logical operations are performed to decide which slot is to be serviced. Using PLC ladder programming we interface CPU with PLC through communication and protocols and serial to USB converter. Required components for the project includes PLC, PLC software, sensor (through beam), HMI.