Desarrollo de un servidor de datos industrial para el protocolo modbus rtu para lectura y escritura de datos boolenos, enteros y flotantes, a dispositivos esclavos.

Abstract

At industrial level, there are a variety of software to implement supervisory control systems that work with various industrial communication protocols, one of the most important is the MODBUS protocol with its variants ASCII, RTU and TCP. There are commercial servers that work with this protocol, but their acquisition cost is high, which limits their use in SMEs. The proposed work allows the development of a data server for MODBUS RTU, which will have the 8 main function codes established by the standard for reading and writing Boolean, integer, and floating data. For its development, free software will be used for both the creation of the server and for the management of a database, using JAVA with the Eclipse IDE and MySQL. The use of free software will allow to reduce the costs of this type of servers, making them more accessible to SMEs with the advantage that these servers can be improved since their programming code can also be accessed. The program has two modes of operation, the first works in MODBUS RTU master mode, which allows communication with a MODBUS RTU slave device to test the 8 function codes, the second mode of operation is the data server mode, which performs a continuous communication with the slave device and a database, which in turn connects to an HMI generated in the Wonderware Intouch software.