摘要
隨著電子技術的發展，可編程控制器（以下簡稱PLC）不斷更新、發展，PLC控制是自動控制中最常見的控制方式之一。自動門就是自動控制應用的一個典型的例子。由于可編程控制器具有良好的處理自動門的開關控制及良好的穩定性，而且可以很簡單的改變控制的方式，因此，自動門的生產商家很多都運用PLC來做門的控制器。目前自動門在日常生活中運用越來越廣泛。
本文總共分五個章節進行敘述其軟、硬件結構、工作原理等，具體如下：
第一章介紹國內外自動門的現狀，本課題研究的目的和意義。
第二章主要介紹自動門控制系統方案的設計。
第三章介紹自動門的硬件系統的設計，PLC的選型，變頻器的選型，系統結構，自動門控制電路，控制電路的連接。
第四章介紹系統軟件的設計，PLC梯形圖概述，編程軟件的介紹，程序流程圖，程序的編寫工作。
第五章主要介紹了梯形圖程序的下載，調試及結果分析。
關鍵詞：PLC，變頻器，驅動裝置，感應器。
ABSTRACT
With the development of electronic technology, the programmable logic controller (PLC) constantly updated hereafter, development and PLC control is one of the most common in automatic control. Automatic door is one of the typical example of application control applications.Because PLC has nicer effect and nicer stability in switch control, and can be very easy to change the control mode, so specialized manufacturer use PLC to make the door controller. Automatic door was more and more widely in everyday life.
This chapter describes five chapter in the software and hardware structure, working principle, specific as follows:
The first chapter is the situation at home and abroad, the automatic research purpose and meaning.
The second chapter is automatic control system scheme design.
The third chapter is automatic hardware system design, selection of PLC and frequency converter, system structure, automatic control circuit, control circuit connection.
The fourth chapter is system software design, PLC ladder-diagram programming software introduced, and the program flowchart, compiling the program.
The fifth chapter introduces how to download the ladder-diagram program, commissioning and results.
Keywords: PLC, frequency converter, driving devices, sensors.
