Abstract
Siemens PLC traditional experimental teaching has been using a S7-200 series PLC, industrial control, however the use of S7-300 series PLC, while the S7-200 and S7-300 series of PLC both from the working principle of the development of both the programming different, so that the students in the PLC after the development of technically significant disadvantage. Therefore design to the S7-300 series PLC to control the core, the use of laboratory equipment, combined with pneumatic technology, sensor technology, such as technology, completion of material sorting system for sorting the material, and on this basis the development of experimental designed to allow students in the lab will be able to access to the S7-300 series PLC, the independent material sorting system to complete the design, understanding based on the S7-300 series of PLC control system design methodology, for future development to lay a certain basis.