Desenvolvimento de método de um benchmarking para análise comparativa de desempenho de controlador industrial comercial e raspberry utilizando plataforma codesys

Abstract

Programmable Logic Controllers (PLCs) are embedded systems based on microprocessors that currently are considered the main basis of industrial automation. However, its lack of flexibility and slow evolution in programming methods have been impacting on industrial evolution, while costs and complexity of issues to be solved tend to increase. This work aims to perform a comparative performance analysis between low-cost hardware PLC with high-level language and medium-sized traditional PLC. By means of benchmarking methodologies and multiple measurements of time processing, this paper intent to compare the performance of the PLCs, aspiring to facilitate and encourage the use of low-cost hardware. The results show that the low-cost PLC based on the Raspberry Pi 4 achieves a higher processing performance than the traditional PLC. However, due to other factors not tested in this work - such as network interfaces, communication protocols and memory speed - it was not possible to reach a conclusive result covering all functions and all application of the traditional PLC.