The main purpose of using a PLC (Programmable Logic Controller) is to automate industrial machines and processes. A PLC replaces manual control and hard-wired relay systems with a programmable, flexible controller. It monitors input signals from sensors, processes them based on the logic written in the program, and sends output signals to control devices like motors, valves, or alarms. This helps factories run machines automatically without human intervention, ensuring speed, safety, and accuracy.
In simple words, a PLC acts as the brain of an automation system. It keeps production lines running smoothly, reduces errors, and allows easy modification whenever the process changes. PLCs are widely used in industries like manufacturing, packaging, power plants, and material handling systems. The main purpose is to make operations more efficient, reliable, and cost-effective by giving full control through programmable logic instead of manual wiring or switches.