Draw and explain schematic of PLC based automatic car parking barrier system.

Draw and explain schematic of PLC based automatic car parking barrier system.
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Explanation: Automatic car parking system allow to park maximum numbers of car in parking zone according to size of parking zone. parking zone number of vehicle parked in parking zone is less than available parking space then automated parking system allow entering next car in parking zone. In parking zone number of vehicle parked in parking zone is equal to available parking space then automated parking system does not allow enter next car in parking zone. 
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