AbstractMore and more financing and technology are plough into the tradition machine for exerting efficiency and prompting precision rapidly, acquire well impression. Now it become efficiency approach for corporation reconstructive,by numeric control systemcomposing PLC module frequency and conversion control and inspect equipment carry out programme import and automatization control,to reduce trouble and improve efficiency.The paper summarize the design project and application technology in machine numeric control system, and introduce the PLC development and application in simply, by the machine numeric control system reconstructive.The paper introduce the PLC programme specialty and mode,emphases the STEP7- Micro/Win 32 design project and application technology for example PLC. Combined to apply the plait distance to make to elaborate to A7-39 pair pillarses sign type lathe.And the paper introduces the PLC interface technology,network protocol and the HMI.
Keywords: PLC;programme technology;transfer and unit machine