A programmable logic controller (PLC); programming language structural analysis

Abstract

Application of Programmable Logic Controller in the sphere of industrial automation substantially simplified technological processes control. New data exchange systems and new algorithms are being developed. It leads to enormous variety of comptrollers. We consider a programmable logic controller (PLC), a device that performs control of the physical processes of the algorithm written in it, oriented to work with devices developed through the input sensor signals and output signals to the actuators. PLCs are designed to work in real-time systems. Note that one of the advantages of the PLC system is modular. That is, the ability to combine and mix of types of input and output devices in a manner that best suits the application. Each of them differs by specific set of functions, unique construction and certain control language. In this article we describe classification of PLC, that can help to choose one, and also present the structural analysis of PLC programming languages.