【正文】 s in Figure4, the auxiliary relay is the up moving flag of the elevator. When the current direction of the elevator is up, ?s contacts are closed。英文原文 2021 Workshop on Power Electronics and intelligent Transportation System Design and Practice of an Elevator Control System Based on PLC Xiaoling Yang1,2,Qunxiong Zhu1,Hong Xu1 1 College of information Science amp。Technology, Beijing University of Chemical Technology, Beijing 100029, China 2 Automation College of Beijing Union University,Beijing,100101, China yxl_lmy , , Abstract This paper describes the development of 2 ninestorey elevators control system for a residential building. The control system adopts PLC as controller, and uses a parallel connection dispatching rule based on minimum waiting time to run 2 elevators in parallel mode. The paper gives the basic structure, control principle and realization method of the PLC control system in detail. it also presents the ladder diagram of the key aspects of the system. The system has simple peripheral circuit and the operation result showed that it enhanced the reliability and performance of the elevators. 1. 1ntroduction With the development of architecture technology, the building is taller and taller and elevators bee important vertical transportation vehicles in highrise buildings. They are responsible to transport passengers, living, working or visiting in the building, fortable and efficiently to their destinations. So the elevator control system is essential in the smooth and safe operation of each elevator. it tells the elevator in what order to stop at floors, when to open or close the door and if there is a safetycritical issue. The traditional electrical control system of elevators is a relaycontrolled system. it has the disadvantages such as plicated circuits, high fault ratio and poor dependability。 on the contrary, when the current direction of the elevator is down, ?s contacts are opened. to denotes the carcalls? stopping request signal of floor 2 to floor 8 respectively. This program has two functions: (1) Make the elevator response the normal down hallcalls when it is moving down, and when a down hallcall is served, its registration is canceled. (2) When the elevator is moving up, the corresponding floor?s down hallcall it passing by is not served and the registration is remained. The cancellation of down hallcalls is reversed with up hallcalls. . Elevator’s direction The elevator may be moving up or down, depending on the bination of hallcalls and carcalls. The following ladder diagram in illustrates that the elevator will move up. Figure5 shows that when the calls corresponding floor is higher than the elevator?s current location, the elevator will go up. Here the auxiliary relay is used as the upmoving flag. When the elevator is moving up, the upmoving lamp is illuminated, so the is connected on. When the elevator arrives the top floor, the upmoving lamp is off and the timer starts. After , the is disconnected, the upmoving display is off. Here we used to replace which can ensure the cancellation?s reliability. . Elevator’s floorstopping Figure6 shows the ladder diagram of the elevator?s floorstopping function. As showed in Figure6, is the flag of floorstopping signal. is the floorstopping signal sent by the driver. is the fire signal sent by the fire switch. And is the forced speed changing signal. When either of these contacts act, the system should send out the floorstopping signal. . Minimum waiting time algorithm in traffic of elevator systems, there are two types of control task usually. The one is the basic control function to mand each elevator to move up or down, to stop or start and to open and close the door. The other is the control of a group of elevators. The main requirements of a group control system in serving both, car and hall calls, should be: to provide even service to every floor in a building。 to minimize the time spent by passengers to move from one floor to another。 Zoning Algorithm[3] which by analyzing the traffic of elevator system with unequal floor and population demand to dispatch the elevator。s Geic Evolution”. Computer Engineering and Applications, No. 22, . [4] Xiaodong Zhu, Qingshan Zeng (2021). “A Elevator Group Control Algorithm for Minimum Waiting Time Based On PLC”. Journal of Hoisting and Conveying Machiner, No. 6, 英語翻譯 2021 年電力電子技術和智能交通系統(tǒng)研討 基于 PLC 電梯控制系統(tǒng)的設計與實踐 Xiaoling Yang1,2,Qunxiong Zhu1,Hong Xu1 信息科學與技術學院， 中國北京 100029 北京化工大學 中國北京 100101 北京聯(lián)合大學自動化系 yxl_lmy , , 摘要 本文描述了一個住宅樓宇的兩個 9 層電梯控制系統(tǒng)的發(fā)展。本文給出了基本結構，控制原理和詳細的 PLC 控制系統(tǒng)的實現(xiàn)方法。該系統(tǒng)具有簡單的外圍電路，操作結果顯示他可以增強電梯的可靠性和它的性能。電梯負責運輸乘客，建設居住，工作或者在建筑中的參觀，舒適而高效的到達他們的目的地。電梯控制系統(tǒng)告訴電梯以什么樣的順序在樓層中停下，什么時候打開或者關閉廳門，是否有安全問題。繼電氣控制系統(tǒng)有一些缺陷，比如復雜的電路，高故障率，低可靠性，并極大的影響電梯的運行質量。這樣做的結果表明改革后的系統(tǒng)操作可靠，維護方便。 電梯控制系統(tǒng)的目的就是能夠管理運動的電梯響應用戶的請求。 這里我們采用一種新型的 LC 系列交流接觸器來代替舊的，并且用 PLC 的接觸來替代大量的中間繼電器。因此，原控制柜的缺陷如過高的電壓和高噪音被有效的克服了。輸入信號是：操作模式，操作控制信號，轎廂請求，廳門請求，安全 /保護信號，廳門打開 /關閉信號，調配信號等。電梯的 PLC信號控制系統(tǒng)圖如圖 1 所示。 操作代碼 操作控制信號 安全 /保護信號 PLC 轎廂呼叫按鈕 廳門呼叫按鈕 水平傳感器 樓層傳感器 樓層信號燈 廳門呼叫燈 方向燈 到達信號 門打開 /關閉控制 門打開 /關閉信號 電力驅動系統(tǒng) 操作代碼對于每一個電梯，在每一層都安裝有一個傳感器。電梯的轎廂門可以由門電機打開或關閉。還有另外一個傳感器，當門關閉時，可以檢測對象。 除了第一層和最高層以外，每層都有一副方向燈，顯示電梯的上升和下降。 電梯控制發(fā)展的第一步是定義基本需求。 （ 1） 單個電梯運行 一般來講，一個電梯有三個操作步驟：正常模式，防火保護模式和維護模式。只有維護模式被取消其他操作模式才能夠被執(zhí)行。當火開關復位時，電梯應當進入正常操作模式。但有一些制約因素如下： 每一個電梯在轎廂控制盤上都有一組 9 個按鈕，每層一個。當相應樓層被電梯訪問時，亮著的按鈕將熄滅。當按下這些按鈕時，這些按鈕將會被點亮。 轎廂控制盤上的按鈕或者樓層控制盤上的按鈕通常用來控制電梯的運行。電 梯在某一樓層不會停，除非有人想在那一層下。 如果電梯沒有請求，那么它將會保持在當前樓層，并關上廳門。它每天早上 7:00 到 9:00和下午 5:00 到 7:00 運行。當有停止請求時，它將在這個高度停下。 如果另一個電梯準備好要停車或者已經停 止，那么這個電梯間不會在這一層停車。 由于調用的時間，調用的位置和乘客的目的地的隨機性，電梯控制系統(tǒng)成為了一個典型的實時系統(tǒng)。在系統(tǒng)中有 46 個輸入端， 46 個輸出端。