Implementación de un sistema remoto para control y monitoreo de procesos utilizando un PLC con Gateway IIOT.

Abstract

The aim of this technical research project was to implement a remote system for process control and monitoring using a Programmable Logic Controller (PLC) with Industrial IoT Gateway (IIoT). The system consists of 3 sub-processes: the first is pneumatic and composed of a PLC that processes signals, magnetic sensors and activates the coils inside the valves, moving the pistons; the second is a control for indicator lights, which come on depending on the programming and the third is a thermal control using an SB 1231 RTD module to read the PT 100 temperature sensor, which indicates the temperature value and mediates an incandescent bulb and a fan, whereby these actuators work to reach the programmed set point, by means of a Proportional-Integral-Derivative (PID) controller. The communication system was implemented with an EWON-FLEX brand IIoT Gateway. This links to the internet through a virtual private network (VPN) connection through the eCatcher program to control the upload and change of programs to the PLC; it also acts as a server for the human-machine interface (HMI) programmed in HTML language, using VIEWON software. An IP camera was configured for real-time vision. The test results determined that the data connection was successful in all the tests performed. It was concluded that the system has 100% stability, depending only on the internet connection both in the laboratory and the remote test site. The speed it took for the system to establish a connection from a remote location was less than 345 ms. It was thus concluded that the system has an acceptable communication latency time from the computer to the PLC. It is recommended that a backup power system be installed for the constant operation of the didactic module.