PROFIBUS-DP智能从站的设计

Under the guidance of modular design method, this paper designs a series of intelligent PROFIBUS-DP slave stations suitable for industrial fields. A slave station can be divided into three parts from the hardware and the function: one is microprocessor control unit based on C8051F023, the other is PROFIBUS-DP communication interface unit based on Siemens ASIC chip SPC3, the third is various types of I/O circuit unit. The microprocessor control unit and communication interface unit are relatively fixed. Different I/O circuits distinguish the specific function of various slave stations. This modular hardware design method have the features of good flexibility and strong portability.