Abstract
With the development of factory automation technology, Profibus-DP fieldbus and Modbus protocol has become the most widely used communication technology at home and abroad, but the choices which can accomplish the data conversion between these two devices is not enough. According to the Modbus RTU communication agreement for the use of frequency converter, the article provides a kind of communication interface based on Profibus-DP and the Modbus communication protocol conversion which mainly introduces its hardware and software design scheme, and expounds the dependability and real-time performance of the communication interface.
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