This design USES the existing laboratory equipment, material sorting unit of FMS system based on PLC, kunlun state based on touch screen and Siemens S7-200 PLC material sorting unit monitoring and control system design is mainly design of the hardware and software of automatic washing machine system with Siemens S7-200 series PLC as the control core, MM440 frequency converter by Siemens, and letter E10 series servo drives, material sorting table module, digital tube module, PC and RS - 232 serial interface, of PLC program USES the ladder diagram programming, man-machine interface is kunlun state touch-screen, and through the communication protocol to realize the serial material sorting unit based on PLC of FMS system can realize push materials, transport materials, sorting material, and implement related monitoring function on a touch today's society more and more high degree of automation, the application of materials based on automated sorting will be more and more widely, therefore, the FMS system based on PLC of the material sorting unit has very important practical significance to the research and : PLC, transducer material sorting automation servo drives