PLCs perform all control tasks, from simple machines control applications to sophisticated manufacturing and process control Applications.
PLC almost in every part of industry:
1- Steel mills (rolling mills).
rolling mills
2- Paper plants (chip handling ).
3- Food-processing plants (brewing - accumulating conveyors).
conveyor control
4- Power plants (burner control - coal handling).
5- Chemical plants (mixing – pipelines control).
Mixing process 
