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1.Programe logic controller is smart and compact controller.
2.It's increase the production time.
3.Reduce the breakdown and maintenance cost.
4.Easy to troubleshooting.
5.Reduce the manpower.
A programmable logic controller (PLC) is an industrially hardened computer-based unit that performs discrete or continuous control functions in a variety of processing plant and factory environments. Originally intended as relay replacement
1- reduce cost as it doesn't require to implement a lot of inputs and outputs which you don't need it to monitor in classic control (flags)
2- minimum hardware maintenance tasks
3- simplicity i.e provide wide range of control schemes (blocks )
4- facility to change the control technique according to industry requirement
