Programmable logic controllerA programmable logic controller (PLC) is a used for of processes, such as control of machinery on factory , amusement rides, or lighting fixtures. PLC is used in many industries and machines. 1.History The PLC was invented in response to the needs of the American automotive manufacturing industry. Before the PLC, control, sequencing, and safety interlock logic for manufacturing automobiles was accomplished using hundreds or thousands of , , and and dedic
