Desarrollo e implementación de puente para traducción de protocolo MODBUS a MODBUS TCP y viceversa

Tijerino-Cerna, César

2002

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Proyecto de Graduación (Bachillerato en Ingeniería Electrónica) Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Electrónica, 2002.

In the Centro de Servicio, Investigación y Desarrollo of the Instituto Costarricense de Electricidad (I.C.E.), different types of projects are made, for the improvement of the services given by this institution. One of the projects that the Center has begun to develop is to place some remote transmission units (RTU) in different points around the dams of the I.C.E., for the measurement of some physical variables. These units are part of a SCADA system and each one communicates its data using the protocol for industrial networks MODBUS. The monitoring of these units can be made connecting them to an Ethernet network, using a variation of the protocol MODBUS, MODBUS TCP, but the connection of the devices cannot be made directly, is necessary to develop a translator of protocols. According to the requirements of the Center, the translator had to be programmable, its final cost did not have to exceed the USS700 and the translatiing application had to be made in C. In order to make the connection, a translator of protocols MODBUS to MODBUS TCP was implemented, using a Rabbit 2000 TCP/IP development card. A program for translation of protocols and the handling of one TCP/IP socket was also implemented.

Instituto Tecnológico de Costa Rica. Escuela de Ingeniería en Electrónica. Instituto Costarricense de Electricidad.

Hardware; Software; Capas; Internet; Conexiones;