Abstract
The Fieldbus is integration of technology of the modern computer, the communication and the control. The PROFIBUS-DP technique has been widely applied in the field of industrial control. So how to design corresponding slave station interface circuit shows particularly important. The design of interface circuit based on 89S52 MCU is given on the question of Profibus-DP Fieldbus slave station communication interface, the way and thought of Profibus-DP slave station communication interface including hardware and software is given in detail, the communication network experiment is finally made by taking ACS400 series of inverter as development object. Experiments show that the design of the circuit is reliable and efficient, so there is great practical value.
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