Inovance MD330H - Page 181

Description of Function Codes
MD380 User Manual
- 180 -
When the set frequency is higher than the rated frequency, the acceleration/
deceleration time is:
2
5
9
b
f
T
f
t =
4
(
×(
)
+
9
)×
In the formula,
f
is the set frequency,
b
f
is the rated motor frequency and
T
is the
acceleration time from 0 Hz to
b
f
.
Function Code Parameter Name Setting Range Default
F6-08
Time proportion of S-curve
start segment
0.0% to (100.0% – F6-09) 30.0%
F6-09
Time proportion of S-curve
end segment
0.0% to (100.0% – F6-08) 30.0%
These two parameters respectively dene the time proportions of the start segment and the
end segment of S-curve acceleration/deceleration. They must satisfy the requirement: F6-08
+ F6-09 ≤ 100.0%.
In Figure 6-12, t1 is the time dened in F6-08, within which the slope of the output frequency
change increases gradually. t2 is the time dened in F6-09, within which the slope of the
output frequency change gradually decreases to 0. Within the time between t1 and t2,
the slope of the output frequency change remains unchanged, that is, linear acceleration/
deceleration.
Figure 6-12 S-curve acceleration/deceleration A
Output
frequency (Hz)
Set frequency (f)
Time (t)
t1 t2 t2t1
Figure 6-13 S-curve acceleration/deceleration B
Output
frequency (Hz)
Set frequency (f)
Rated frequency (fb)
T
Time (t)