PLC ( Programmable Logical  Controller )

PLC  stand for programmable logical  controller.  PLC   is an  industrial computer  used to monitor inputs and depending upon  their  make decisions  based  on its  program  to control  its outputs to  automate a  machine  or a process. In  another way a PLC  may be called a digitally operating electronic  apparatus because it is basically used  a programmable  memory for the internal storage of  instructions by implementing specific  functions  such as  logic  sequencing. Timing  counting and  arithmetic to control  various  types of machines. They are  used in many industries such as oil  refineries manufacturing  lines  conveyor  system etc.