Abstract: In order to solve the problem of PROFIBUS-DP(Process Field Bus-Decentralized Periphery) bus device access to Wi-Fi, this topic discusses the wireless Web client based on Wi-Fi for PROFIBUS-DP. At first, we get a further research and analysis about the network structures and network protocols of both PROFIBUS-DP and Wi-Fi. Then we use the method of embedded gateway to finish the interconnection communication of the two kinds of heterogeneous networks. At last, we design the wireless web client based on the structure of B/ S that the wireless client can monitor the devices of PROFIBUS-DP with the help of Wi-Fi. Finally, the result data is tested and the data is transmitted correctly. So the access method is reliable.

Key words: protocol conversion, Web technology, process field bus, gateway