Integração e monitoramento remoto de controladores BR6000 siemens via protocolo modbus RTU em ambiente CLP com software TIA portal.

Abstract

This thesis presents the development of a remote data reading system for power factor controllers using the Modbus RTU protocol. The objective is to monitor and optimize the power factor of electrical systems, ensuring energy efficiency and reducing costs related to reactive power penalties. The proposed solution is implemented through an architecture that involves the Siemens S7-1200 controller, equipped with the CM1241 communication module for the RS-485 interface. The power factor controller is responsible for adjusting the power factor of an electrical installation by adding or removing capacitor banks according to demand. These devices usually operate locally, which can limit the capacity for real-time monitoring and control. The S7-1200 CPU acts as the master in the Modbus communication, while the power factor controller operates as the slave, responding to requests sent by the master. The CM1241 module is responsible for establishing the connection via RS 485, a robust serial communication interface suitable for industrial environments. Through this connection, the S7-1200 performs periodic readings of operational data from the controller, such as voltage, current, power factor, and the status of the capacitor banks. These data are then processed by the controller and made available for remote visualization through the PI Vision system. The interface allows supervisors and technical teams to monitor the system’s performance in real-time, identify anomalies, and make preventive adjustments. Additionally, the system can issue automatic alerts if operational parameters exceed predefined limits, allowing for a quick and efficient response.