A Programmable Logic Controller – PLC, also known as programmable controller, is the name given to a
type of computer commonly used in commercial and industrial control applications. PLCs can differ
from office computers in the types of tasks that they perform and the hardware and software they
require to perform these tasks.
All PLCs monitor inputs and other variable values, make decisions based on a stored program, and control outputs to automate a process or machine.
PLC (Programmable logic Control) is hardware industries and digital computer control system aimed at automating the electromechanical processes. In PLC Training students are taught to monitor the processes involved in the input devices to generate a signal which controls the output devices
In the earlier stages of development, the control and sequencing was mainly composed of relay, cam trainers, and drum sequencers. But it was quite hectic to update as it was time consuming and expensive. The father of PLC is considered to be Dick Morley.
The first PLC was created by Bedford Associates (named as 084) in 1968, when they took up the challenge from GM Hydramatic for replacement of electronic equipments for a hard wired relay systems based on paper written by Edward Clarke. Certain developments took place around the years when Mitsubishi launched Q series in launched in 2002.