基于三菱PLC的三層電梯控制系統(tǒng)設(shè)計


頁數(shù)：32 字數(shù)：11641

目 錄
摘 要 1
第1章 電梯概述 3
1.1 引言 3
1.2 電梯的發(fā)展簡史 3
1.3 電梯的基本結(jié)構(gòu) 3
1.4 電梯的分類 5
第2章 可編程控制器簡介 6
2.1 PLC的結(jié)構(gòu)及各部分的作用 6
2.2 PLC的工作原理 7
2.3 PLC的編程語言 8
2.4 PLC基本指令 8
2.5 梯形圖設(shè)計規(guī)則 11
第3章 三層電梯PLC控制系統(tǒng)設(shè)計 12
3.1 電梯的控制要求 12
3.2 三層電梯主電路 12
3.3 輸入輸出點數(shù)分配 12
3.4 PLC外圍接線圖 13
3.5 功能指令表概述 14
3.6 程序分析 15
3.7 三層電梯梯形圖程序 19
3.8 三層電梯助記符語句程序 21
3.9 本系統(tǒng)的不足及改進 27
結(jié) 束 語 29
致 謝 30
參考文獻 31



摘 要
電梯是高層建筑不可缺少的運輸工具，用于垂直運送乘客和貨物，傳統(tǒng)的電梯控制系統(tǒng)主要采用繼電器--接觸器進行控制，其缺點是觸點多，故障率高、可靠性差、維修工作量大等，而采用 PLC組成的控制系統(tǒng)可以很好地解決上述問題。
本論文通過討論電梯控制系統(tǒng)的組成，闡述可編程控制器（PLC）在電梯控制中的應(yīng)用，采用三菱PLC編程的程序控制方式，提出了三層電梯的PLC控制系統(tǒng)總體設(shè)計方案、設(shè)計過程、組成， 列出了具體的主要硬件電路、電梯的控制梯形圖及指令表。并給出了系統(tǒng)組成框圖和程序流程圖，在分析、處理隨機信號邏輯關(guān)系的基礎(chǔ)上，提出了PLC的編程方法，設(shè)計了一套完整的電梯控制系統(tǒng)方案。采用本方案實現(xiàn)電梯控制，能夠解決繼電器——接觸器觸點多，故障率高、可靠性差、安裝調(diào)試周期長、維修工作量大、接線復(fù)雜等缺點。使電梯運行更加安全、方便、舒適。

關(guān)鍵詞：電梯、PLC、梯形圖






Abstract
Elevator, the necessary transportation tool for tall buildings, is used for transferring passengers and commodities vertically. Most traditional elevator control system adopts relay--- contacting machine as its central director. But this system has so many disadvantages such as too many contacting points, high fault rate, heavy repairing work and so on. So if it was replaced by the control system equipped with PLC, the problems will be solved much more easily.
This essay explains the application of PLC (Mitsubushi PLC) on elevator，by discussing the construction of elevator control system. It also illustrates the general design project, the design process and construction of the PLC control system for three-story buildings, listing the specific main circuit, trapezia control chart of elevator and repertoires. It also shows the construction of frame chart of the system and process flow chart. Thus the programming method of PLC is brought forward on the basis of analyzing and dealing with the logic relationship of random signs. It also designed a complicated elevator control system. If the project can be accepted, it can solve the problems which can be brought by relay, such as too many contacting points, high fault rate, low reliability, long installation and debugging time, heavy repairing work, complex connection and so on.
Keywords：Elevator，PLC，Lader View