Yaskawa VS mini J7 Series - Manual (Page 71)

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To prevent shock at machine start/stop, accel/decel can be performed in a S-curve
pattern.
Note: The S-curve characteristics time from accel/decel rate 0 to a regular accel/decel rate
determined by the set accel/decel time.
Soft-start characteristics (n020)
Setting S-curve characteristic time
0 S-curve characteristic not provided
1 0.2 second
2 0.5 second
3 1.0 second