Controlador Lógico Programável

Abstract

This study aims to address the theme of "Programmable Logic Controller (PLC). Therefore, initially sought to contemplate the developments in the industry up to the present models with its high degree of automation. Then, the automation’s principles were treated, addressing some relevant definitions and concepts to its understanding. After the insertion of the theme in the area where it was developed, controllers have become the target of the study, with information about its historical summary and its evolution, the block components of the system, its physical structure and its existing models. The PLC technology has been addressed in their hardware and software details, referring to the CPU module, system memory, power supplies, input and output modules for analog and digital, special modules, programming languages, operating modes and working principle. The study concludes by presenting the importance of the issue in the naval sphere, nowadays used in all ship environments, applied in the machine’s electronic control, central government, the alarm control for safety of navigation, signaling and interfaced systems with the engine room.