【正文】 PLC 梯形圖 MCGS 控制系統(tǒng) II Control system design based on PLC of escalator Abstract As an indispensable transportation tool for modern stores supermarkets, Escalator is used for carrying passengers, goods, the traditional escalator control system mainly adopts relayscontact device control, its shorting is contacts, high failure rate, poor reliability, maintenance workload big, etc, and use of PLC control system can well solve the problems. This paper discussed the position of the escalator control system, expounded the programmable controller (PLC) in the elevator control application, adopted the mode of programming which is used Siemens PLC program control , put forward the escalator PLC control system overall design scheme, design process and the final simulation results, list the major hardware circuit, the elevator control ladder diagram, and gave the system position diagram and program flow chart. put forward PLC programming method based on the analysis and deal with the re fault signal , designed a set of plete escalator control system scheme. And the adjustment of the program, and eventually used MCGS show the entire control interface out by animation. Key words: Escalator PLC ladder diagram MCGS control system 目錄 摘要 ................................................................................................................................. I Abstract ..........................................................................................................................II 第一章 引言 .................................................................................................................. 1 自動(dòng)扶梯的發(fā)展和研究現(xiàn)狀 .......................................................................... 1 自動(dòng)扶梯的發(fā)展歷史 ........................................................................... 1 國(guó)內(nèi)自動(dòng)扶梯的實(shí)例介紹 ................................................................... 2 自動(dòng)扶梯的概述 .............................................................................................. 3 自動(dòng)扶梯的定義 .................................................................................. 3 自動(dòng)扶梯的基本結(jié)構(gòu) .......................................................................... 3 自動(dòng)扶梯的分類 .................................................................................. 5 自動(dòng)扶梯的主要參數(shù) .......................................................................... 5 第二章 S7— 200 系列 PLC 的概述 ............................................................................. 6 PLC 的定義 ..................................................................................................... 6 PLC 的基本組成 ............................................................................................. 6 可編程控制器的特點(diǎn)、分類和技術(shù)指標(biāo) ..................................................... 8 可編程控制器的特點(diǎn) ........................................................................... 8 可編程控制器的分類 ......................................................................... 10 可編程控制器的技術(shù)指標(biāo) ................................................................ 11 PLC 的工作原理 ........................................................................................... 12 的工作模式 ................................................................................. 12 PLC 工作過程 .................................................................................... 13 第三章 系統(tǒng)實(shí)現(xiàn)的總體方案 .................................................................................... 16 系統(tǒng)實(shí)現(xiàn)的主要功能 ................................................................................... 16 扶梯的運(yùn)行與停止功能 .................................................................. 16 扶梯的故障處理功能 ...................................................................... 17 扶梯的自動(dòng)潤(rùn)滑功能 ...................................................................... 17 可編程控制器與其他控制器的比較 ............................................................ 17 可編程控制器與繼電接觸器控制系統(tǒng)的比較 ................................. 17 可編程控制器與微機(jī)控制系統(tǒng)的比較 ............................................. 18 可編程控制器與單片機(jī)控制的比較 ................................................. 19 第四章 系統(tǒng)硬件設(shè)計(jì) ................................................................................................ 20 輸入 /輸出點(diǎn)的分配 ....................................................................................... 20 主要硬件選型 ................................................................................................ 22 三相異步電機(jī)選型 ............................................................................. 23 選型 ............................................................................................. 23 第五章 PLC 控制程序設(shè)計(jì) ....................................................................................... 24 STEP7 軟件 ................................................................................................... 24 STEP7 軟件概述 ................................................................................ 24 STEP7 軟件基本功能 ....................................................................... 24 界面及主要部分功能 ......................................................................... 25 控制程序開發(fā) ............................................................................................... 26 星三角形切換電路 ............................................................................. 26 自動(dòng)扶梯的上下行切換 .................................................................... 28 自動(dòng)扶梯檢修點(diǎn)動(dòng)運(yùn)行 ..................................................................... 29 自動(dòng)潤(rùn)滑系統(tǒng)控 制 ............................................................................. 30 故障顯示模塊 ..................................................................................... 30 表 51 安全開關(guān)的故障顯示碼 ................................................................................. 31 第六章基于 MCG