| 摘要 |
PROBLEM TO BE SOLVED: To display a graphic display easy to be seen even when operation information is varied greatly when the operation information is graphically displayed. SOLUTION: A CPU displays a differential ball data in a machine of a machine type A as a graph 500 to correspond to a time axis (t) displayed from a left side to a right side along a transverse direction in a figure, using the maximum value within the machine type as an upper limit (max) and using the minimum value within the machine type as a lower limit (min). In this case, the maximum value '2000' 183 serves as the upper limit value of the graph 500, and the minimum value '-10,000' 184 serves as the lower limit value of the graph 500.
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