| With the development of control technology, Distributed Control System based on the core thought of centralized management and distributed control don't meet the customers' requirement. However Fieldbus Control System adapts to the customers' requirement. Because this opened and interlinked net technology is accepted,which connects with each other among every controller and instrument and scatters the control function to understratum completely, it reduces the cost of installation and maintenance. Therefore, in essence FCS is a kind of opened ,interlinked and completely scattered distributed control system.Nowadays, FCS technology has been becoming one of the hottest realm in automation area.Via studying the need of hydropower station sets control system, this paper researches the feasibility of carrying out local grade communication control by using PROFIBUS FCS technology and designs and develops the related hardware and software.At first,the paper introduces the characteristic and merit of PROFIBUS FCS technology.It analyzes the basic characteristic, the protocol architecture, the transmission technology and the access protocol of PROFIBUS-DP.At the same time, the paper analyzes the transmission process of physics layer,data and link layer and application layer.Afterwards, on the basis of the need of hydropower station sets control system the paper describes the systemic design method of the intelligent slave with SPC3 and SPM2,including hardware and software design of the intelligent slave,the GSD file edit and the debugging of intelligent slave.At last,a system is established with PROFIBUS devices from SIEMENS and the tapped intelligent slave.We develop the application program with Microsoft VC++.The tapped PROFIBUS-DP intelligent slave achieved the original design requirement and completed the preliminary basic function.And now,it is connectedto PROFIBUS-DP system successfully.It is a good base for the future in-depth research of PROFIBUS.
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