A work methodology consisting of four stages is presented, that allows fault tolerant communication, using the master/slave communication model between a PC master and a 3-DOF robot slave, by means of the Modbus protocol. In particular, the first of those stages is implemented. The analysis, selection and use of all the hardware and software tools for the implementation and simulation of industrial communications by means of the Modbus protocol are described. An analysis is made of various existing softwares for communication with the Modbus protocol as well as for developing the corresponding hardware, i.e., MatLab, LabVIEW, Proteus, MPLAB, C Compiler, INTOUCH, SCADA Software, Modbus Communication, WINTECH Software, and Modbus Poll, among others. Using LabVIEW and Proteus a methodology is presented that allowed the implementation of an application for successful RS 232 Rx/Tx serial communication.