| 摘要 |
<p>PURPOSE:To attain effective plant surveillance by deleting and recovering unnecessary trend graph on the same screen without scrolling the display screen and monitoring many trend graphs in a short time. CONSTITUTION:Process data sent from a plant 1 is displayed on a CRT display device 6. If there are trend graphs desired to delete among displayed ones on the CRT display device 6, the operator touches a specified part on the touch screen device 10. A coordinate conversion part sends the directed coordinate to a display output control part 12 and the display control part 5 indicates the trend graph on the CRT display device 6 in the deleted state of the trend graphs desired to be deleted.</p> |
