The Modeling And Analysis Based On PROFIBUS-DP Of Networked Control Systems

The research on network control systems has becomed a new issue in the field of automation. The subject roots in the national 863 project (2004AA304050).This paper deeply make research to the specification of PROFIBUS-DP, and make a detailedly analysis of its theory. This paper tries to found the model of network control system based on the PROFIBUS-DP ISOCHRONE SYNCHRONIZATION mode with the linear system theory, and proves the ISOCHRONE SYNCHRONIZATION mode is an ideal disperse control system. Furthermore, this paper analyzes and validates the ISOCHRONE SYNCHRONIZATION model with MATLAB tools named TRUETIME.This paper founds the periodic and aperiodic commission model based PROFIBUS-DP with Stochastic process, and analyzes that the error bit rate and aperiodic commission impact the system cycle time (sampling time). The error bit rate and aperiodic commission may delay the system cycle time differently. If the Token-ring cycle time is determined enough, the system cycle tends to stabilization.This paper develops the "the manufacture control system of polyester" based on PROFIBUS-DP bus with the S7-300 PLC and configuration Software IFIX3. 0.This paper develops the interface hardware of PROFIBUS-DP with the SPC3 chip, and according to the interface offered by SPC3, compiles the programs of communication, designs a kind of PROFIBUS-DP intelligent slave interface.