本科毕业论文-六层双部并联电梯的PLC设计范例.doc

[摘要] 本文介绍了由西门子S7-200PLC控制的六层电梯模型的结构、实现的功能以及西门子S7-200PLC的I/O接口分配和对电梯系统的程序设计等。通过对六层电梯控制系统的流程设计，完成了控制开关门操作和在运行模式下的呼叫提示、上下运动、启动、延时2s关门、平层泊车、开轿厢门、信号排队等控制性能。经过编写程序软件、安装硬件以及与六层双部电梯模型的联调，使得六层电梯模型能够在运转的过程中显明的表现出来。使用两台西门子S7-200PLC作为控制器交替和计算机通信结合到电梯的控制系统中去。采用MCGS组态作为上位机监控电梯运行，出现故障报警，实时数据存盘。主要实现的功能：双部并联控制、保持开门时间2S控制、本层厅外开门、门开到位后会延时2S关门、开门按钮开门、 换站停靠、轿内照明控制、层楼显示字符设置、显示器、超载保护、门缝防夹保护、上下楼标示，脉宽调速（PWM）。 [关键词] 西门子S7-200PLC；六层电梯；双部并联；MCGS组态；脉宽调速 Abstract: This article describes the six-layer structure parallel lift for double unit, the functions and Siemens S7-200PLC of I / O interfaces are assigned to the elevator system and program design.We have completed a lot of features through six elevator control system process design, such as through a control switch door operation and call tips in run mode, the up and down movement, start delay 2s close, leveling parking, open car door The signal wait in line. Connect the hardware, the compiled software programs downloaded to the PLC, the commissioning of six elevators model makes the advantages of parallel twin unit during operation of the elevator can be manifested in distinct. The controller can achieve control of the elevator together using two PLC and computer communication. MCGS as a PC monitor elevator running, failure alarm, real-time data achieving and archiving. Main function: the two parallel control unit, hold open time 2S control, outside this hall door, open the door in place will delay 2s closed, open button to open the door, for docking stations, car interior lighting controls, floor display character set display, overload protection, door jam protection, marking down the stairs, PWM speed control (PWM). Key words: Siemens S7-200 PLC; Six elevators; Double portion parallel configuration; MCGS;PWM 目 录 1 绪论 1 1.1 论文的背景 1 1.2 系统设计方案的步骤 1 1.3 本设计主要的要求及内容 1 1.3.1 系统设计的主要要求——下位机部分 1 1.3.2 系统的设计的上位机部分 2 1.3.3 设计步骤 2 1.4 本章小结 2 2 变频器的原理与应用 3 2.1 变频器 3 2.1.1 变频器的原理 3 2.1.2 变频器的选型 3 2.2 变频调速系统控制 4 2.3 本章小结 4 3 系统控制方案的设计及