Comparison of Control System Using PLC and PID

A control system is an interconnection of components forming a system configuration that will provide a desired system response.Due to the increasing complexity of the system under control and the interest in achieving optimum performance, the importance of control system engineering has grown in the past decade.This paper proposes the development of a robust soft-hardware interfacing based advance control where linearize the input-output data is obtained.A proportional-integral-derivative controller (PID controller) is a generic control loop control Feedback mechanism widely used in industrial control system.A PID controller attempts to correct the error between a measured process variable and a desired setpoint by calculating and then outputting a corrective action that can adjust the process accordingly.PID controller is designed using MATLAB functions to generate a set of coefficients associated with a desired controller's characteristics.A MATLAB program is used to activate the PID controller, calculate and plot the time response of the control system.Although, PID based controller have particularly been successfully applied in modern control engineering in the last decade, this paper deals with the feasibility of employing advanced control technique of Programmable Logic Controllers (PLC) to linearize the input-output characteristics of control system.In machining, packaging, material handling, automated assembly or countless other industries applications the PLC is more efficient considering money and time than any other control.The effectiveness of proposed control system of water tank liquid level control is amply demonstrated by the significantly low error in discrete response testing.