| 摘要 |
<p>PURPOSE:To prevent overlapping of trends and to improve operability and maintenability by arbitrarily changing the range of one axis of ordinates automatically when a plurality of trends are overlapped on the trend graph on a display. CONSTITUTION:A coordinate monitoring part 11 receives position signals in a plurality of trends and converts the positions into coordinates. Whether the coordinates of the trend whose change is large is overlapped on the position coordinates of the trend whose change is small or not is judged in the monitoring part 11. A changing-rate judging part 12 receives the signals whose trends are overlapped and judges the chang ing rate and the changing direction of the trends. An ordinate-range changing part 13 changes the range of the axis of ordinate for the trend based on the output from the judging part 12 and confirms the width of the change. A position judging part 14 receives the output from the changing part 13 and diagnoses and confirms the fact that said trend is located at a position where the trend is not overlapped on the other trend in the changed ordinate range. A display device 15 displays a plurality of the trends which are the outputs in the case wherein the outputs from the judging part 14 or the trends at the monitoring part 11 are not overlapped with one another.</p> |
