Improvement of control and monitoring of industrial processes using PLC by implementing asynchronous bidirectional communications and UMI

Abstract

This paper presents the creation of an new asynchronous bidirectional communications protocol, for industrial application in automated processes using Programmable Logic Controllers (PLC) from different manufacturers or from a single manufacturer, making it possible to communicate with each other or with a local server, in an efficient way (in data and processes) thus achieving the basis for the remote monitoring and control (via internet) of the entire automated industrial process. The usual master-slave network architectures were replaced by a point-to-point architecture in industrial protocols such as ModBus TCP / IP, thus reducing the number of packets, to send only information on status changes or control. User - Machine Interface (UMI) is coined to show the changes in the state of the industrial process. Since the control and monitoring of industrial processes (locally) uses a human-machine interface (HMI), the need to use a new interface is detected to perform efficient communication, this could allows remote monitoring and control.