摘  要:隨著人們生活水平的日益提高，電梯成為了城市生活中必不可少的垂直交通工具。電梯的種類和功能也逐漸的增多，傳統的電梯已經不能滿足現今人們生活需求。人們對于電梯的要求也越來越高，不僅是在安全性、舒適性上，在電梯的效率和節能方面也有了較高的要求。

　　　傳統的電梯中的繼電器控制和單臺電梯的運行已經不能滿足人們的需求了。在本次設計中是在一臺電梯的基礎上，以PLC為核心，改造出雙電梯的控制系統。用以解決人們在現今生活中遇到的種種困難，提高電梯的工作效率和有效的節約資源。為人們的出行提供便利。

　　　在論文中，通過對PLC的分析和比較選擇出適合的PLC，選擇了西門子的編程的控制方式，提出來九層雙電梯的設計思路，列出了系統控制流程圖、控制原則、I/O分配表及電梯的梯形圖。完成了雙電梯控制系統，切實的做到了節省資源和合理運用電梯。

關鍵詞：雙電梯;PLC;分層;控制

ABSTRACT:As people living standard is increasing day by day, the elevator has become the essential vertical transportation in the city life. Type and function of the elevator also gradually increase in the number of updates, and the traditional elevator cannot meet the demand of people's life today. People also more and more higher to the requirement of the elevator, not just in safety, comfort requirements, in terms of efficiency and energy saving of the elevator also have higher requirements.

　　　The traditional relay control and single elevator in the elevator running already cannot satisfy people's needs. In this design is based on an elevator, with PLC as the core, the reform of double elevator control system. To solve all kinds of difficulties in people in today's life, improve the working efficiency of the elevator and effective save resources. Provide convenience for people's travel. 

　　　In the paper, through the analysis of the PLC and comparison, choose the suitable PLC chose Siemens programming control method, put forward nine layers of double elevator design train of thought, lists the system control flow chart, control principle, the I/O allocation table and the ladder diagram of the lift. Complete the double elevator control system to do save resource and reasonable use of the elevator.

Keywords: double elevator; PLC; layered; control