Analysis And Design Of CGSE-ES SCADA System

This thesis describes the Supervisory Control and Data Acquisition (SCADA) system in Cryogenic Ground Support Equipment-Electrical System (CGSE-ES), which is an important part of CGSE system. Its main responsibility includes: display and monitor of system signals, data archive and database management. Using Human Machine Interface (HMI), the working condition of CGSE system is shown clearly and with accuracy. A convenient control platform is also provided, so that operations and changes on mechanical system can be done in time.The design and analysis of CGSE-ES SCADA system includes: HMI design, database access and data interface design, principle analysis and software design of CAN communication interface, analysis and design of cross-platform communication interface.HMI design: According to different run time modes of CGSE system, design corresponding HMI using WinCC. WinCC HMI can provide a general idea of the system and also works as a monitor.Database access and data interface design: Process data can be seen directly in HMI, archive data in WinCC database can also be seen using MS SQL Server and WinCC OLE DB interface. In addition, a process data export interface is designed according to OPC DA standard, for further analysis and research of the data.Principle analysis and software design of CAN communication interface: According to CAN protocol in AMS-02, software module of CAN communication interface is designed using EPP–CAN Box driver as a reference. The CAN communication interface enables the system to retrieve Magnet information from Cryomagnet Avionics Box (CAB). Also, a test of CAN communication is done, which verifies the reliability of CAN communication interface. The test consists of two programs, i.e. cab-master and cab-slave and involves one specific CAB application command.Analysis and design of cross-platform communication interface: Data transfer from Linux to Windows is enabled using TCP/IP protocol and Socket programming. And data is finally shown in WinCC HMI using OPC communication between VB application and WinCC. In addition, a test environment for cross-platform communication is implemented with the help of virtual Linux. Three programs (TCP_Client in Linux, TCP_Server and OPC_Client in Windows) are used to verify functions and stability of cross-platform communication interface.