With the development of electronic technology, programmable logic controller continuously updated, development, PLC control is the control one of the most common control method, automatic door control applications is a typical example, as programmable logic controller automatic door with a good deal with the switch control and good stability, and can easily change in a controlled manner, therefore, the production of automatic doors business to do a lot of doors are used PLC controller. Automatic doors now more and more widely used in daily life.
This paper discusses the automatic door control system consists of the following components: programmable logic controller, signal acquisition device, inverter, drive, transmission device. The advantage of simple structure, easy to control, functional, and reliable control system functions. Fully automatic control of the performance, with some reference with practical value.
The main working principle of this design is determined by the signal acquisition device and will have no one read the signals into binary signals to PLC, PLC based Variable-frequency Drive switching signals to control the opening stop and speed transformation, driven by gear door movement. And through the GX-Simulator6c and programming software GX Developer8.0 simulation and debug system to carry out analysis.
PLC是专门为工业控制而开发的装置,其主要使用者是工厂广大电气技术人员,为了适应他们的传统习惯和掌握能力,通常PLC不采用微机的编程语言,而常常采用面向控制过程、面向问题的“自然语言”编程。国际电工委员会(IEC)1994年5月公布的IEC1131-3(可编程控制器语言标准)详细地说明了句法、语义和下述5种编程语言:功能表图(Sequential function chart)、梯形图(Ladder diagram)、功能块图(Function black diagram)、指令表(Instruction list)、结构文本(Structured text)。梯形图和功能块图为图形语言,指令表和结构文本为文字语言,功能表图是一种结构块控制流程图。