Design a PLC program and prepare a typical I$/$O

connection diagram and ladder logic program that

will correctly execute the industrial control process

in Figure $8-42.$ The sequence of operation is as

follows:

Product in position$\_($limit switch LS$1$ contacts

close$).$

The start button is pressed and the conveyor

motor starts to move the product forward toward

position A $($limit switch LS$1$ contacts open when

the actuating arm returns to its normal position$).$

The conveyor moves the product forward to posi$-$

tion A and stops $($position detected by $8$ off$-$to$-$on

output pulses from the encoder, which are

counted by an up$-$counter$).$

A time delay of $10$ s occurs, after which the con$-$

veyor starts to move the product to limit switch

LS$2$ and stops $($LS$2$ contacts close when the actu$-$

ating arm is hit by the

product$).$ Write code ladder in smatic simens