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The European X-Ray Laser Project XFEL X-Ray Free-Electron Laser Process Control: Object Oriented Model for Offline Data Ch. Gerke, T. Boeckmann, M. Clausen, J. Hatje, H. Rickens Different tools using different techniques generate different configuration files. The DESY Oracle relational database is used as a common repository, Each application (corresponding to different configuration files) has a different set of tables defined in the database. Tables for different points of interest are linked by columns IO_name which contain symbolic names for the relevant input or output channel, respectively. This same name is usually taken from the R&D drawings. EPICSORA uses Oracle Forms and Stored Procedures to generate a GUI for the developer of EPICS database files (*.db) In a first step there are “prototypes” defined for each project. They • group several records together • define some field values • declare some parameters • can be nested • “feel” a bit like OO-classes. Secondly “instances” are defined for the appropriate prototypes. This usually just involves assigning a value to a prototype’s parameter. IO configurator uses Java classes to represent the tree structure of field bus systems. Hibernate is used to make the objects persistent in the Oracle database Instances “feel” a bit like OO-objects A CSS plugin for the Profibus field bus system is using the tree viewer of JFace. It takes information entered by the engineer and from the GSD-files (General Station Description files) to produce the configuration and parameterization files to be loaded to the Profibus Master. Node Classes and abstract classes used to define the tree properties of field bus systems. The abstract classes contain properties and methods useful for all field bus systems. The database definition provides default values for the EPICS database files EPICSORA defines deviating values on several levels The values different from the default values are written to the database file for the IOC Deutsches Elektronen-Synchrotron DESY Helmholtz Association of German Research Centres 22603 Hamburg, Germany www.xfel.net The concrete classes are specific for the field bus system in use. At present we are implementing the Profibus field bus. -id -name -parent: NodeParent +getParent() +setParent() NodeParent -children: Node +addChild() +removeChild() +getChildren() +hasChildren() Channel Slave Module -slaveNumber -moduleNumber +getModules() +setModules() +getChannels() +setChannels() +getSlave() +setSlave() -channelNumber -input: boolean -digital: boolean -ch_size: int -ioName: String +getModule() +setModule() +isDigital() +setDigital() +...()