Abstract
For the four kinds of network protocols which are common in industry :PROFIBUS-DP, DeviceNet, EtherNet/IP and Modbus-RTU, a gateway has been designed which could integrate the four protocols ,and have developed hardware and software program of the Multi-protocol self-adaptation gateway .It uses STM32F407ZGT6 as its major chip. A Modbus-RTU interface has been designed which depends on the UART interface of the main chip to send and receive packets in hardware. It use COMX as hardware interface of PROFIBUS-DP ,DeviceNet ,and EtherNet/IP to process their packets. It has achieved a function that the PROFIBUS-DP interface will change its address with the changing of the configuration of master .In addition, the multi-protocol self-adaptation gateway can integrate several masters which support different protocols in one network. The master controllers could communicate with each other in this network.After being tested and verified ,it has been used in the communication of DCS systems, and it has converted the packets of the four protocols which have been mentioned above and it has met the demands of designing a gateway.
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