Design And Implementation Of Profibus Wireless Transmission Device

The Profibus technology is widely used in the industrial field. To some special occasions, the wireless communication is essential for the information exchanging. Thus, the wireless technology used in the fieldbus was put forward. This thesis examined the research status at home and aboard and the significance, introduced the Profibus protocol and the wireless communication key technology, analyzed several integration ways of the Profibus and the wireless communication technology. Next, this thesis proposed to achieve the Profibus-DP wireless communication using wireless repeater and showed the wireless communication development technology. The circuit and the software configuration focusing on the hardware and software design was discussed in detail.At last, the test system and conclution was given.This thesis developed a wireless communication module, which achieved the wireless communication of the Profibus-DP master and salve station. The effective transmission distance is 10m, the maximum data baud is 187.5Kbps; the delay of the wired and wireless data transfer is 29μs.This thesis's design idea is using wireless repeater to achieve Profibus wireless communication, in order to meet the Profibus timing requirements for the data transmission, the main technical difficulty is to minimize the conversion delay of the wired wireless data.The innovation of the thesis is using wireless repeater to achieve the Profibus-DP wireless communication. Compared with the wireless gateway, the wireless module can adapt to the industrial control. Moreover, the wireless module is transparent to Profibus-DP and non further configuration is needed. A couple of wireless modules have four CC1100 wireless ships, which make the wireless data communication is full-duplex. The CC1100 works in the "direct mode", which minimize the delay time. This is the features of this thesis.