This document aims to demonstrate the way in the programmable communication of Siemens LOGO! 24/24 RCE and the software for the design of man-machine interfaces Wonderware InTouch, as an example, the simulation of the control of the level of the tank for its practice and dynamics of processes. The KEPserverEX software, which is an OPC server, facilitates communication between the native protocol and the OPC client (InTouch) with the intention of achieving the link to establish the necessary communication in the supervision and control application.