精品文档---下载后可任意编辑[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 S7-200PLC;Six elevators;Double portion parallel configuration; MCGS;PWM精品文档---下载后可任意编辑目 录1 绪论 11.1 论文的背景 0 1.2 系统设计方案的步骤 0 1.3 本设计主要的要求及内容 0 1.3.1 系统设计的主要要求——下位机部分 0 1.3.2 系统的设计的上位机部分 0 1.3.3 设计步骤 0 1.4 本章小结 0 2 变频器的原理与应用 0 2.1 变频器 0 2.1.1 变频器的原理 0 2.1.2 变频器的选型 1 2.2 变频调速系统控制 1 2.3 本章小...
