[关键词]西门子S7-200PLC；六层电梯；双部并联；MCGS组态；脉宽调速Abstract:Thisarticledescribesthesix-layerstructureparallelliftfordoubleunit,thefunctionsandSiemensS7-200PLCofI/Ointerfacesareassignedtotheelevatorsystemandprogramdesign.Wehavecompletedalotoffeaturesthroughsixelevatorcontrolsystemprocessdesign,suchasthroughacontrolswitchdooroperationandcalltipsinrunmode,theupanddownmovement,startdelay2sclose,levelingparking,opencardoorThesignalwaitinline.Connectthehardware,thecompiledsoftwareprogramsdownloadedtothePLC,thecommissioningofsixelevatorsmodelmakestheadvantagesofparalleltwinunitduringoperationoftheelevatorcanbemanifestedindistinct.ThecontrollercanachievecontroloftheelevatortogetherusingtwoPLCandcomputercommunication.MCGSasaPCmonitorelevatorrunning,failurealarm,real-timedataachievingandarchiving.Mainfunction:thetwoparallelcontrolunit,holdopentime2Scontrol,outsidethishalldoor,openthedoorinplacewilldelay2sclosed,openbuttontoopenthedoor,fordockingstations,carinteriorlightingcontrols,floordisplaycharactersetdisplay,overloadprotection,doorjamprotection,markingdownthestairs,PWMspeedcontrol(PWM).Keywords:SiemensS7-200PLC;Sixelevators;Doubleportionparallelconfiguration;MCGS;PWM目录TOC\o"1-3"\h\uHYPERLINK\l"_Toc421176968"1绪论PAGEREF_Toc421176968\h1HYPERLINK\l"_Toc421176969"1.1论文的背景PAGEREF_Toc421176969\h1HYPERLINK\l"_Toc421176970"1.2系统设计方案的步骤PAGEREF_Toc421176970\h1HYPERLINK\l"_Toc421176971"1.3本设计主要的要求及内容PAGEREF_Toc421176971\h1HYPERLINK\l"_Toc421176972"1.3.1系统设计的主要要求——下位机部分PAGEREF_Toc421176972\h1HYPERLINK\l"_Toc421176973"1.3.2系统的设计的上位机部分PAGEREF_Toc421176973\h2HYPERLINK\l"_Toc421176974"1.3.3设计步骤PAGEREF_Toc421176974\h2HYPERLINK\l"_Toc421176975"1.4本章小结PAGEREF_Toc421176975\h2HYPERLINK\l"_Toc421176976"2变频器的原理与应用PAGEREF_Toc421176976\h3HYPERLINK\l"_Toc421176977"2.1变频器PAGEREF_Toc421176977\h3HYPERLINK\l"_Toc421176978"2.1.1变频器的原理PAGEREF_Toc421176978\h3HYPERLINK\l"_Toc421176979"2.1.2变频器的选型PAGEREF_Toc421176979\h3HYPERLINK\