A PROGRAMMABLE LOGIC CONTROLLER (PLC) is an industrial pc control machine that constantly video display units the nation of enter devices and makes choices based totally upon a custom application to govern the country of output devices. Almost any manufacturing line, device function, or process can be significantly superior using this type of control system. However, the largest advantage in the usage of a p.C is the potential to change and replicate the operation or technique even as amassing and communicating important facts. Any other benefit of a % device is that it's miles modular. That is, you could mix and in shape the varieties of enter and Output devices to fine fit your utility. History OF PLC. The primary Programmable Logic Controllers had been designed and advanced by way of Modicon as a relay re-placer for GM and Landis. These controllers removed the need for rewiring and including extra hardware for every new configuration of common sense. The new sys...