15.Design a PLC program and prepare an I/O connection diagram and ladder

logic program that will correctly execute the conveyor motor control

process illustrated in Figure 8-20. Enter the program into the PLC and

prove its operation. The operational sequence can be summarized as

follows.

The start button is pressed to start the conveyor motor.

Cases move past the proximity switch and increment the counter's accumulated value.

After a count of 50, the conveyor motor stops automatically and the counter's accumulated value is reset to zero.

The conveyor motor can be stopped and started manually at any time

with out loss of the accumulated count.

The accumulated count of the counter can be reset manually at any time by means of the counter reset button.

Figure 8-20 Control process for assignment 15.