Abstract
With microprocessors, computers and digital communication technologies, rapid development Computer-controlled technology has penetrated into all industrial fields PLC is widely used and powerful. Easy to use generic industrial control devices, has become a modern industrial automation an important pillar In recent years, China has been rapid in the promotion of universal Is changing the face of factory automation, the traditional technological innovation, development of new industries is of great practical significance with the increasing frequency converter technology improved, using the programmable logic controller for motor asynchronous Frequency Control Design, Implementation motor stall speed, automatic speed control. Through laboratory experiment the original equipment innovation, hope that through this experiment for the future of the teaching provided little help.
