Desarrollo de tarjetas de comunicación para conexión a buses de campo seriales : diseño e implementación de un prototipo de tarjeta de comunicación a una red modbus rtu para un sensor analógico de 0-10v.

Abstract

This curricular integration paper focuses on the design and development of an acquisition and communication module based on the Modbus RTU serial fieldbus protocol. Modbus RTU is a communication protocol widely used in industrial systems for the interconnection of electronic control and data acquisition devices. The main goal is to create an analog signal acquisition module that, in turn, enables efficient and reliable communication between itself and a programmable logic controller. The development of the module included several key stages: Modbus RTU protocol analysis, hardware design, firmware programming, and integration and validation testing. The hardware design covered aspects such as the selection of suitable microcontrollers, RS-485 interface and communication circuits, and the layout of components to minimize interference and maximize signal integrity. As for the firmware, functions for Modbus frame encoding and decoding, error handling, and real-time communication management were implemented. Integration and validation tests were carried out in the industrial network laboratory of the National Polytechnic School, using simulation equipment and real devices. The results showed that the developed module meets the interoperability and performance requirements, ensuring a stable and fast communication with the PLC. This project provides a flexible and scalable solution for industrial communication, offering a modular design that can be adapted to different applications and industrial environments