CONTROLE DE PROCESSOS PID UTILIZANDO CLP

Abstract

This study presents a model for automated processes using the Proportional, Integral, and Derivative (PID) block of a Siemens S7-1200 programmable logic controller (PLC) to control level, temperature, flow, and pressure in a plant with sensors and actuators. The system was configured and tuned to efficiently control the process variable. The read values are used in the calculation of proportional, integral, and derivative gains, which determine the output of the PLC. The PLC communicates with a supervisory and human-machine interface (HMI) screen, where variables such as reservoir level, water temperature, water flow, and ambient pressure can be monitored. Additionally, the user has the option to define SetPoint values, proportional gain, integral time, and derivative time through the HMI. At the end of the process, a graph is generated with input, output, and SetPoint values, and based on the characteristics of the generated waves, the system is classified as overdamped or underdamped, indicating the effectiveness of the implemented control.