| 摘要 |
<p>PURPOSE:To improve a process control function and operability by displaying the entire process flow and zooming up or down a flow chart, centered about an arbitrary point on a display screen, if necessary. CONSTITUTION:When a variety of commands is inputted through a keyboard 3, a CPU 12 generates control command codes corresponding to those commands and adds them to a process controller through an interface 16. In parallel with this action, an image of a part set by a CRT controller 15 is segmented, and an image obtained by this action is reduced at a set contraction scale to display it on a CRT 7. After a mouth 6 is moved, data on this moving is detected by the CPU 12 to move a cursor, and the central position of the image is stored in a RAM 14. Then, when a zoom key 4 is reversely turned to reduce the contraction scale, the CPU 12 detects that and changes the image control parameter of the CRT controller 15.</p> |
