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Parameter Descriptions 7-43
Case 1:If frequency set value (Analog setting via voltage, current, RS485 or
keypad) is within the range of skip frequency, it maintains the low limit value.
If the set value is outside the range, it increases the frequency up to the set
value.
Case 2:In the case of a decreasing frequency setting, if the frequency set
value (Analog setting via voltage, current, RS485 or keypad) is within the
range of skip frequency, it maintains skip frequency high value. If the
setting is outside the range, it decreases frequency to the set value.
H17 S-Curve Accel/Decel Start Side
H18 S-Curve Accel/Decel End Side
Range: 0.1-100 [%]
Default: 40
Access Configurable
See also: P41, P42, F2, F3
Set the speed reference value to form a curve at the start and end cycle of
the acceleration and deceleration curves. If it is set higher, linear zone gets
smaller.
H17 sets the starting and H18 the ending ratio between S-curve and Linear
in ½ of Accel/Decel Ref. Frequency. For smooth Accel/Decel starting,
increase H17 or H18 to extend the S-curve ratio.
Note that setting Frequency Ref. for Accel/Decel (H70) is set to Max Freq
and target freq is set below Max freq. the shape of the S-curve may be
distorted.
Accel time for S-curve setting
Decel time for S-curve setting:
2
1
8
41
2
17
4141
H
P
H
PP ×+×+=
2
1
8
42
2
17
4242
H
P
H
PP ×+×+=