Secondary Development Of The Siemens 840d Cnc System Interface, Based On Vb

In order to meet the need of the market, the numerical control system is developed towards the open structure, the secondary development carrying on the open numerical control system is another brilliant point of the current numerical control technology . SINUMERIK 840D numerical control system that Siemens Company offered has offered the better platform for our secondary development. The secondary development of every function module become inevitable ,too. Lathe manufacturers, in order to integrate one's own function module in the system, must undergo the secondary developmentIn this paper, It is the developing platform that we choose SINUMERIK 840D numerical control system, regarding boring the milling type lathe as the research object, study under the environment of Visual Basic, utilize VC ++ to establish Dynamic Link Library at the same time , realize the communication with 840D numerical control system. Among them we make use of VB to design the man-machine interface, and utilize NCDDE server, the language form offered with OEM software development bag in the procedure codes carries on the visit to data in NCK , PLC in 840D numerical control system and access, thus realize the control and operation of the numerical control lathe . The function of Dynamic Link Library of language is to realize the transfering of the text, the text of appearance on the interface can be read from the language Dynamic link Library.For the boring the milling type lathe, this paper has carry on the design about the interface, and realized the communication, and has put forward the scheme to the whole systematic structure. Programming this system with friendship to integrate systematic interface, integrate numerical control of getting of the system peculiar function module. It provides a friendly integrated system face in which inter-consultation can be done in Chinese in the microcomputer environment.Finally, this paper discusses and predicts the research trend of the Human Machine Interface so as to be used in the later research.