Controle de acionamento e velocidade de um motor de indução trifásico via IHM remota utilizando o protocolo Modbus

Abstract

The Human-Machine Interface (HMI) plays a crucial role in the interaction between humans and computer systems. This work focuses on the creation of a remote HMI for controlling a Three-Phase Induction Motor (TIM) through a CFW500 frequency converter, utilizing the Modbus RTU communication protocol and the RS-485 serial interface. This study centers on the use of the CFW500 as a mean to drive a TIM, because it offers advantages such as speed control and protection against overloads and current spikes. However, the integrated HMIs in these devices have limitations, such as restricted parameter access and automation challenges. The primary objective of this study was to develop a remote HMI capable of controlling the activation and speed of a TIM through the CFW500 using the Modbus protocol. To achieve this goal, specific objectives have been established, such as drawing the system, connecting the components, CODESYS programming, parameterizing the frequency converter, establishing communication between the components, creating a graphical interface and running tests. The results show that it was possible to control the TIM’s speed while its frequency, current and tension were monitored. The implementation of this HMI addresses limitations of integrated HMIs in frequency converters, enabling more flexible control and simplified parameter access. The utilization of the RS-485 interface and the Modbus protocol facilitates the communication between devices, making the system more efficient and easily integrable. By fulfilling the set objectives, this study contributes to enhancing efficiency and usability in the control of TIMs.