| 摘要 |
<p>PURPOSE: To provide a CRT device with a screen operation administering function and to increase the response speed of a screen display irrelevantly to the load on a CPU side as to the centralized monitoring system for a plant, etc., which has the CPU that gathers display data from a monitored object and stores the data in a memory M and the CRT device as a man-machine interface. CONSTITUTION: The CPU repeatedly stores the display data, gathered through a process 01, in the memory M by the kinds of screens to update the display data in the memory M. When key operation for requesting a screen display is carried out in a process 02, the CRT device analyzes the contents of the key operation to determine the kind of a display screen and reads the display data of the corresponding screen out of the memory M to display the screen. At this time, the CRT device and CPU need out communicate with each other for the screen display as before.</p> |
