【正文】 igh, reduced the elevator reliability and the security greatly, creates frequently stops the ladder, for while brings inconvenient and startled sorrow with the also the elevator occurs flushes goes against or squats the bottom, not only can create the elevator mechanical part damage, but also possibly appears the accident causing personal used PLC in the elevator control, PLC may carry on the breakdown automatic detection with to report to the police the demonstration, enhances the safety in operation, and is advantageous for the design is about the mercial sightseeing elevator control system design, its logic controls by PLC replaces the original blackwhite control, through the reasonable choice and the design, raised the elevator control level, and improved the elevator movement fort, enabled the elevator to achieve the more ideal control effect. Key words: PLC； relays； Elevator 目 錄 緒論 ...................................................................................................................................... 1 電梯設(shè)備與電梯發(fā)展動態(tài) .................................................................................................. 2 電梯設(shè)備 ...................................................................................................................... 2 III 電梯的分類 ....................................................................................................... 2 電梯的主要組成部分 ....................................................................................... 2 電梯的安全保護(hù)裝置 ....................................................................................... 2 電梯的發(fā)展動態(tài) .......................................................................................................... 3 電梯技術(shù)發(fā)展概況 ........................................................................................... 3 電梯發(fā)展展望 ................................................................................................... 4 PLC 的選擇 .......................................................................................................................... 5 電梯繼電器控制與 PLC 控制的比較 ................................................................................. 6 電梯繼電器控制系統(tǒng)的特點及存在問題 .................................................................. 6 電梯繼電器控制系統(tǒng)的優(yōu)點 ........................................................................... 6 電梯繼電器控制系統(tǒng)存在的問題 ................................................................... 7 PLC 及在電梯控制中的應(yīng)用特點 ............................................................................... 7 PLC 的特點 ......................................................................................................... 7 PLC 控制電梯的優(yōu)點 ........................................................................................ 8 系統(tǒng)硬件設(shè)計 ...................................................................................................................... 9 PLC 控制系統(tǒng) 總體 設(shè)計 ............................................................................................... 9 設(shè)計 思路 ...................................................................................................................... 9 信號控制系統(tǒng) ................................................................................................. 10 電梯控制系統(tǒng)實現(xiàn)的功能 ............................................................................. 10 I/0 地址的分配 ............................................................................................. 12 七段數(shù)碼管顯示 ............................................................................................. 12 I/O 接線圖 .................................................................................................... 13 系統(tǒng)軟件設(shè)計 .................................................................................................................... 14 電路 開關(guān)門運行回路 ................................................................................................ 14 電梯的外召喚信號 登記消除及顯示回路 .................................................