Implementación de un sistema de expansión de entradas y salidas digitales y analógicas para el PLC S71200

Abstract

In the present work the process for the implementation of an expansion module is detailed in order to increase the number of digital and analog signals that a programmable logic controller (PLC) can handle, it was built based on a free hardware platform such as its Arduino.

Similarly, through the Proteus and Ares programs, a circuit was implemented for the processing of discrete or analog signals in order to protect the microcontroller pins, a voltage control circuit that commands the analog outputs was also implemented. To define the shape and size of the module parts, the structure was modeled in the SolidWorks program.

An algorithm was developed in the TIA PORTAL V15 program to communicate a Siemens S7-1200 programmable logic controller type client server via modbus TCP / IP, in the same way a program was made that was loaded to an Arduino mega 2560 for signal processing and establish communication with the automaton for the exchange of information between both devices.

Finally, two explanatory videos were recorded, the first one refers to the generalities of the expansion module as well as the steps to follow for programming both the automaton and the microcontroller. The second video explains the suggested maintenance for the expansion module