Abstract: Liquid flow rate is a measure of velocity of a liquid which is flowing through a pipe or a closed cross-section. This paper aims to compare, analyze and determine the suitable control method for liquid flow process. There are several ways to control and stabilize flow process, in that we compare two control methods (PID controller and PLC) which has vital role in industrial applications. A Proportional–Integral–Derivative controller is a control loop mechanism employing feedback that is widely used in industrial control systems. Programmable Logic Controller (or PLC) is a ruggedized computer used for industrial automation. This controller can automate a specific process, machine function, or even an entire production line. This paper aims to conclude best controller for a real-time liquid flow process.

Keywords: PID, Cohen-Coon, Ziegler-Nichols, PLC, Flow Control, Process Control, DeltaPLC, MATLAB

| DOI: 10.17148/IJIREEICE.2021.9308