Introduction.

Workshop PG5 Exercise Chapter 7
Binary operations & counters
Example:
Parking lot
Output 17
(red light) is
lit as soon as
the parking
lot is full
(Lot_full)
Input 0
( NewCar )
Input 1
( Car_leaving )
You have a parking lot with 8 parking slots.
You have to sensors : One at the entrance gate which gives a pulse each time a
car enters (Input 0 NewCar ) a second sensor at the exit tells you when a car is
leaving (input 1 Car_leaving ).
A signal ( output 17 Lot_full ) is lit as soon as 8 cars are in the parking lot.
Cars can enter the lot even if the lot is already full !!
Set the counter to 0 when you start up.
Goal:
This is a example you already know from the FUPLA examples.
You learn to use counters in IL
You learn to document the program.
You learn how to reset values at start up.
© Saia-Burgess Controls Ltd. Page 7E-7