Desenvolvimento de um sistema supervisório utilizando o protocolo de comunicação OPC para uma planta didática industrial

Abstract

This work presents a study on industrial communication networks, it is proposed an alternative system of supervision and control for a didactic industrial plant, based on the OPC protocol (OLE - Object Linking and Embedding for Process Control). The didactic plant demonstrates two industrial processes: a heating system and a liquid mixing system. These processes are controlled and instrumented for industrial use equipment, using the Profibus communication protocol. The objective of this work is to develop graphical user interfaces using the MATLAB software for the supervision and control of processes, from the connection between MATLAB and OPC server available in the PLC (Programmable Logic Controller) of the plant. The OPC communication protocol enables interoperability between software and equipment, providing the addition of several clients to the network. Thus, the new supervisory system may include multiple devices connected to this network. The created interfaces cover all the processes of the plant, where it is possible to acquire real-time data and implement control techniques for their control loops. As an application, a PID controller is implemented for temperature control for both the heating tank, and to the mixing tank. Then conducts a discussion of the results.