$2.$ Develop ladder logic for an automatic paint process.

When the ON button is pushed, a stacker starts stacking plywood sheet at position A$.$ stack height is controlled by PLC counter function. When $12$ parts $($stack$)$ are placed on the conveyor, it turns ON and moves the stack at the position B $.$

A sensor is used to stop the conveyor at B$.$ At point B$,$ paint is applied for $12$ sec after painting is completed, the conveyor restart s manually and moves to position C and stops automatically and stack is removed.

Sequence:

a$.$ ON button is used to start the process and stacker starts stacking.

b$.$ The sensor is used to count the no$.$ of sheets.

c$.$ After $12$ part stacking, conveyor starts and moves the stack to position B$.$ when it reaches position $\backslash ($ B $\backslash ),$ the sensor stops the conveyor by sensing the position.

d$.$ Paint is applied to $12\mathrm{.}5$ seconds duration.

e$.$ After painting, the conveyor starts manually and moves the stack to position C and stops automatically.