hand written ladder simole ladder diagram

simple ladder diagram*

ROSLITE Design a PLC circuit to control the traffic inside a parking lot such that: 1. It counts and displays the net number of cars inside the parking lot by observing the cars entering and exiting the parking lot. 2. Once a car approaches the entrance, the entrance gate opens and stays opened for 30 seconds and until the car's body entirely passes the gate area. (the same scenario is applied at Exit) 3. If the number of cars in the parking lots reaches 100 car, the entrance gate cannot be opened even with a presence of a car at entrance and an alarm(red light) will be triggered in this case. ROSLITE Design a PLC circuit to control the traffic inside a parking lot such that: 1. It counts and displays the net number of cars inside the parking lot by observing the cars entering and exiting the parking lot. 2. Once a car approaches the entrance, the entrance gate opens and stays opened for 30 seconds and until the car's body entirely passes the gate area. (the same scenario is applied at Exit) 3. If the number of cars in the parking lots reaches 100 car, the entrance gate cannot be opened even with a presence of a car at entrance and an alarm(red light) will be triggered in this case