Researches Of Developments Engineering Bid Standardization Of The Management Of Strategy

The thesis is carried out based on the system transformation project about the coldstation of a cigar mill's power workshop. With the development of the computer, control and network communication technology at full speed, that the fieldbus is regarded as the ground control network of the enterprise's information system has already become an important developing direction of the control network. How to select the fieldbus technology suitable for the relevant project, how to structure the control network, how to realize the exchange and fusion of data between the ground control network and enterprise's information network, and how to realize the enterprise's CIMS have already been a focus on control networked research. In other words, when the real-time data of the on-the-spot equipments are passed to the configuration software of the control network, how to realize the connection of the real-time data with configuration software, and the data exchange between configuration software and application programs are the keys to solving control network and information network integration. In the thesis the author discusses the application of ControlNet fieldbus to the control system transformation of a coldstation at the basis of analyzing ControlNet fieldbus technology.The main content of the thesis and the author's main contribution are listed as follows. The author has carried on a deep analysis to the fieldbus control technology, especially the technological characteristic of ControlNet bus and range of application, explained ControlNet's communication mode, arbitrage way and its network system structure emphatically, and compared ControlNet with other common fieldbus technologies. Based on the analyse to the control requests and targets of technological transformation about the concrete coldstation project, the author goes on more overall demonstration to the feasibility of adopting ControlNet to structure the coldstation control system, and proposes a detailed and concrete conceptual design, including the main equipments and central operation station's control function and goal after transforming.The author designs the software and hardware for the coldstation control network, including its hardware structure and disposition, the MMI software programming of ControlLogix5555 at the scene, and communication mode between ControlLogix5555 and configuration software RSView32, then realizes the efficiency run of the coldstation control network. Forming the CIMS of the coldstation and at the foundation of analyzing the main integrated technologies adopted by the system --OPC technology and configuration software, the author not only structures the software framework of the coldstation system integration, but also designs the coldstation control network and information network using RSView32 configuration software, in order to realize control network and information network integration. Finally, the control software of the whole system is demostrated in the thesis. Obviously, in fact it is studied in the thesis how to use ControlNet to prove the scheme, design system and analyze with the relevant theory to the course control systems same as the coldstation system, including supervisory control and data acquisition. So, the thesis has suitable reference value for the theory study of control system based on fieldbus technology, especially the project application etc.