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Computer Eng 1neer1ng and Appl1cat1ons, No. 22, . [4] X1aodong Zhu, Q1ngshan Zeng (2021). “A Elevator Group Control Algor1thm for M1n1mum Wa1t1ng T1me Based On PLC”. Journal of Ho 1st1ng and Convey1ng Mach1ner, No. 6, 內(nèi)部資料 請勿外傳 9JWKffwvGtYM*Jgamp。在這種情況下，只有一個電梯運行。 4 總結(jié) 在這篇論文中，我們已經(jīng)提高了一個古老的利用 PLC 的電梯控制系統(tǒng)，并實現(xiàn)了組合控制兩電梯。相對于辦公樓和購物中心，交通流是相對較低的住宅，甚至在每一層樓。例如最近鄰算法，電梯總是響應(yīng)最鄰近的請求； 分區(qū)算法，它通過分析電梯系統(tǒng)的運行狀況與不同樓層和乘客需求分發(fā)電梯，還有奇偶規(guī)則，一個電梯只為奇數(shù)樓層服務(wù)，另一個樓梯則只為偶數(shù)樓層服務(wù)。一種是基本控制功能到命令每個電梯上下移動，停止或開始打開或關(guān)閉廳門。 是消防開關(guān)發(fā)出的消防信號。這里我們使用 取代 ，可確?？煽咳∠?。這時輔助繼電器 被當(dāng)做上行標(biāo)志。 向下的轎廂呼叫請求取消逆轉(zhuǎn)向上的轎廂呼叫。 在圖 4 中，輔助繼電器 是電梯向上移動的標(biāo)志。當(dāng)某層有停車信號，相對應(yīng)的樓層將會輸出停止信號。 呼叫請求的集中選擇 在這里，我們要用到集中選擇控制規(guī)則。當(dāng)有人按下樓層控制板上的按鈕時信號將會被寄存并且相應(yīng)的燈會被點亮。 關(guān)于軟件設(shè)計，我們采用了模塊化寫梯形圖程序的方法。 由于調(diào)用的時間，調(diào)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)。當(dāng)有停止請求時，它將在這個高度停下。 如果電梯沒有請求，那么它將會保持在當(dāng)前樓層，并關(guān)上廳門。 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。當(dāng)相應(yīng)樓層被電梯訪問時，亮著的按鈕將熄滅。當(dāng)火開關(guān)復(fù)位時，電梯應(yīng)當(dāng)進入正常操作模式。 （ 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。 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。電梯的轎廂門可以由門電機打開或關(guān)閉。電梯的 PLC信號控制系統(tǒng)圖如圖 1 所示。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。 電梯控制系統(tǒng)的目的就是能夠管理運動的電梯響應(yīng)用戶的請求。繼電氣控制系統(tǒng)有一些缺陷，比如復(fù)雜的電路，高故障率，低可靠性，并極大的影響電梯的運行質(zhì)量。電梯負責(zé)運輸乘客，建設(shè)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。本文給出了基本結(jié)構(gòu)，控制原理和詳細的 PLC 控制系統(tǒng)的實現(xiàn)方法。 Zoning Algorithm[3] which by analyzing the traffic of elevator system with unequal floor and population demand to dispatch the elevator。 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