Construct a program that will keep track of the presence of parts on a 23-station conveyor line as follows: If a part is placed on the line, then a limit switch connected to input A address will...

Construct a program that will keep track of the presence of parts on a 23-station conveyor line as follows: If a part is placed on the line, then a limit switch connected to input A address will close. The conveyor will be indexed by pressing a pushbutton connected to input B. An indicator light connected to output C will turn on when a part comes off the line. Enter the program into the PLC, and prove its operation.