Multifunctional Slave Design Of PROFIBUS DP Fieldbus

Fieldbus is the digital communication technology, which is used in the production field to implement the bidirectional, serial, multi-node communication among devices and between device and control equipment. PROFIBUS is one of the most popular fieldbuses currently, and among these, as a optimized high speed connection PROFIBUS DP is widely applied. But so far, an authoritative standard has not been set up, isolation also exists in the field of automation. According to this, every fieldbus lacks universality in a way.The objective of the research is to design a multifunctional and universalizable slave interface for PROFIBUS DP, so an ordinary device can be connected on this bus conveniently. First, the communication principle of PROFIBUS DP is analyzed in this thesis. Then, according to the principle, the hardware and software design of the slave is deeply described. Thereinto, extended multifunction of the slave upon the communication protocol is especially emphasized and the implementation of every function is detailedly expatiated. The multifunctional slave supply manifold interfaces which can connect analog, digital, parallel and serial device. Finally, in order to consummate the multifunction of the slave, matched software design in the master and establishment of the communication system are related.In the last, summary and expectation of the research are stated.