Process Pane

The process pane shows a dynamic subset of plant information in both graphic symbol and text. The labels are denoted hierarchically from plant to component. They are saved and retrieved in XML format. This XML query language(XQL) is simpler than SQL in the relational database.

All these graphic symbols can be redrawn for consistentency with plant specific symbols. Graphical symbols enhance user's understanding compared with text only. Moreover the multiple attributes of a component can be merged into an single icon. The symbols are not static images but dynamic vector objects. Refer to example source codes for the devices in the editor subdirectory. They are simple java codes.

The parameters and symbols are referred to by both users and computers while evaluating the success logic tree. Besides if users click a row, relevant monitoring display can appear on the adjacent CRT if configured.

Source codes to recieve the selection are in the refer directory. It is up to external programs what display is linked with the selection signal.

Whenever ImPROc needs process information for the current action-check, ImPROc requests its query to the server side. Then ImPROs send the result periodically as long as the action-check is being carried out or monitored. When the action-check is completed, the previous query is removed. This protocol results in the efficient communication and low traffic load.