56
4. Parameter description
Parameter
4.13
Output frequency filtering constant (P.28)
P.28 “Output frequency filtering constant”
● When the acceleration/deceleration time decreases and the output frequency switches from
high-frequency to low-frequency each other, machine vibration may be caused, which will affect
the product quality.
● We can fliter the output frequency at the moment when high-frequency and low-frequency
switches each other by setting output frequency filtering constant P.28, in order to reduce the
machine vibration. The bigger the set value of P.28, the better the filtering effect, but the
corresponding response delay will increase. If the set value of P.28 is 0, the filtering function is
invalid.
Parameter
Factory setting
Setting range
Remarks
28
0
0~31
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4.14
Acceleration/deceleration pattern selection (P.29)
P.29 “Acceleration/deceleration
pattern selection”
Related parameters
P.7 “Acceleration time”
P.8 “Deceleration time”
P.44 “Second acceleration time”
P.45 “Second deceleration time”
P.3 “Base frequency”
P.20 “Acceleration/deceleration
reference frequency”
Parameter
Factory setting
Setting range
Remarks
29
0
0~2
---
<Setting>
• When
P.29=0 ‘Linear acceleration/deceleration curve’
An acceleration slope is constructed by combination of P.7 and P.20. A deceleration slope is
fabricated by combination of P.8 and P.20.
When the target frequency varies, it increases with the ‘acceleration slope’ or decreases with the
‘deceleration slope’ linearly. Figure below:
Output frequency
Time
P.7
P.8
Acceleration slope
Deceleration slope
P.20
