Hello friends. In this article you will learn more about a PLC based automatic car wash system project programmed and explained using ladder logic.
Problem Solution
- Car entry sensor triggers the process and turns conveyor belt ON to move the car.
- Soapy water sprinkler turns ON when stage 1 sensor detects the car and do the process for certain time.
- Brusher turns ON when stage 2 sensors detects the car and do the process for certain time.
- Clean water sprinkler turns ON when stage 3 sensors detects the car and do the process for certain time.
- Dryer turns ON when stage 4 sensors detects the car and do the process for certain time.
- Car exit sensor triggers conveyor motor to turn off.
- Program done in Allen Bradley RSLogix 500 PLC Software.
Car Washing PLC Ladder Logic
PLC Program Description
- Latching rung to operate the system through Master Start and Stop PB.
- The car entry sensor triggers the memory bit which will turn on the conveyor motor
- ON/OFF operation of conveyer motor is happening in this rung using various conditions like Sensor input and timer done output.
- When the car reached stage 1 sensor conveyor motor should stop and the water sprinkler should be ON for 10 sec. At the end of the water sprinkler timer, Conveyer will again be ON because of the parallel contact
- When the car reached stage 2 sensor conveyor motor should stop and the brusher should ON for 10 sec. At the end of the brushing process, Conveyer will again be ON because of the parallel contact.
- When the car reached stage 3 sensor conveyor motor should stop and the water sprinkler should be ON for 10 sec. At the end of the water sprinkler timer, Conveyer will again be ON because of the parallel contact.
- When the car reached stage 4 sensor conveyor motor should stop and the water sprinkler should be ON for 10 sec. At the end of the water sprinkler timer, Conveyer will again be ON because of the parallel contact.
- When the car reached the exit, the car exit sensor will trigger the car wash done indication lamp.