Technology Of Data-Frame Processing Based On User's Customization

In modern process industry, the automation systems had been used widely and experienced many development stage. From Decentralized Control System (DCS), Then to FieldBus Control System (FCS), and then to The Industrial Ethernet based on the technology of Ethernet and TCP/IP. But the control sets of these automation systems have their own characters: blocked and short of unitive and standard opening interface. Different manufactures provide different protocols and communication ways. And this made it necessary to develop different special interface when the users develop up layer application. Such a state not only makes the applications complex and redundancy, what's more bad is when the lower equipment differs, the program had to be rewrite and re-compile. This adds the work of the programmers' maintenance and the developers' burdens.It can be find that the communication protocols of these automation system are based on data-frame, only have different frame format. In order to parse and process the protocols, only have to parse and process the corresponding data-frame. This paper discusses the protocols described by formalize-description, which was checked by the lexical analysis, and then the data-frame parse driven table was generated by the parse analysis. At last the relationship among the segments of the protocols and the action of the user were determined by semantic analysis.So the protocols parse and process program is independent from the frame format, and the same program can process different frame formats. This implementation can avoid coding parse and process program for different data frame formats separately, and make the program more flexible and the adaptable.