53
4. Parameter description
Parameter
4.13 Output Frequency Filter Constant (P.28)
P.28 “Output frequency filter 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 filter the output frequency at the moment when high-frequency and low-frequency
switches each other by setting output frequency filter constant P.28, in order to reduce the machine
vibration. The bigger the set value of P.28, the better the filter effect, but the corresponding
response delay will increase. If the set value of P.28 is 0, the filter function is invalid.
Parameter
Factory setting
Setting range
Remarks
28
0
0~31
---
4.14
Acceleration/deceleration Curve Selection (P.29)
P.29 “Acceleration/deceleration curve
selection”
Related parameters
P. 7
“
Acceleration time
”
P. 8
“
Deceleration time
”
P. 44
“
The second acceleration time
”
P. 45
“
The 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:
O
u
tp
u
t
fr
eq
u
en
cy
Time
P.7
P.8
A
cc
el
er
a
ti
o
n
s
lo
p
e
D
ec
el
er
a
tio
n
s
lo
p
e
P.20
