The User Manual of JAC200 Series General Frequency Converter
- 101 -
The output frequency shall increase or decrease progressively according to the straight line. JAC200
provides 4 kinds of acceleration/deceleration time. Selection can be made through multifunctional digital
input terminals (F4-00
～
F4-08).
1: S-curve acceleration/deceleration A
The output frequency shall increase or decrease progressively according to the Curve S. Curve S must be
used in places where the start or top is smooth such as elevator and conveyer belts. Function codes of F6-08
and F6-09 define the time ratio of acceleration/deceleration of Curve S in start period and in end period
separately.
2: S-curve acceleration/deceleration B
In S-curve acceleration/deceleration B, the rated frequency of motor ƒb is always the inflection point of
Curve S, as shown in Fig. 6- 12. It is generally applied to the occasion that needs rapid
acceleration/deceleration in high-speed area above the rated frequency.
When the set frequency is higher than rated frequency, the time of acceleration/deceleration is:
Where, f is the set frequency, ƒb is the rated frequency of motor, T is the time required for the acceleration
from zero to rated frequency ƒb.
F6-08
Time ratio of Curve S in start
period
Default value
30.0%
Set range
0.0%
～
(100.0%-F6-09)
F6-09
Time ratio of Curve S in end
period
Default value
30.0%
Set range
0.0%
～
(100.0%-F6-08)
Function codes of F6-08 and F6-09 define the time ratio of acceleration/deceleration A of Curve S in start
period and in end period separately and these two function codes shall meet F6-08 + F6-09
≤
100.0%.
The t1 in Fig. 6-11 is the parameter defined by Parameter F6-08, and the slope of output frequency variation
shall gradually increase in the time period. The t2 is the time defined by Parameter F6-09, and the slope of
output frequency variation shall gradually be changed to 0. In the period between t1 and t2, the slope of
output frequency variation is constant, i.e. linear acceleration/deceleration shall be conducted in this
interval.
