| Ethernet for industry as a new, uniform and fast developing standard, has been used widely in resource manage layer, executing layer and manufacture layer of industry corporation integrative automatization. And it also trends to extend to the area of industry fieldwork control. The field-bus'actuality of multi-standard coexisting causes problems of the compatibility of product devices. This is also one of the problems that we must deal with immediately. So, Ethernet for industry fieldwork control will become a hotspot of the industry control. The standard of Ethernet for industry has not been established. Because the technology of field-bus was mastered by foreign componies, so our country must pay large numbers of money to use their field-bus standard. So establish Ethernet for industry standard of ourselvs will bring significant benefit to our society and economy. This paper discusses designing and realization of an embedded industry protocol convert gateway Based on μC/OS-II. It can carry out the conversion between TCP/IP protocol and Modbus protocol. Firstly, we introduce actuality of field-bus's and Ethernet's. We also tell something about founding criterion of Ethernet for industry in the world. Then, we introduce some basic knowledge related to the work, they are: embedded system μC/OS-II., Ethernet and TCP/IP. While introducing the TCP/IP protocol family, we selectively present some protocols used in the task, and discuss what should be cut to fit the embedded system. In the last two chapters, we narrate the design of hardware and software, some diagram and soft coding are presented. In the fifth chapter, we tell the realization and debugging process in details and discuss some problems during dubugging give solutions. Finally, we summarize the paper, point out the deficient and what should be improved in the following work.
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