Definition and Functions of PLCs - JSS3 Basic technology Lesson Note

Programmable Logic Controllers (PLCs) are advanced digital computers designed to automate industrial electromechanical processes. They are robust, reliable, and programmable devices that execute control functions based on input signals from sensors and switches. PLCs replace traditional relay logic systems with faster and more flexible operations, improving efficiency and accuracy in industrial automation. Their applications range from manufacturing assembly lines to complex industrial processes where precise control and monitoring are critical.