Powtran PI160-0R7G1(Z) - Page 74

Chapter 5 Function parameter
70
Chapter 5
Time t
Output voltage
effective value
Time t
Stop brake time T2
DC waiting time T1
DC braking capacity
Output frequency
（Hz）
DC start frequency
Run command
Figure 5-8:Schematic diagram of stop DC braking time
F3.12
Braking utilization rate
0%～100%
100%
☆
F3.13
Ac/deceleration mode
Linear acceleration and deceleration
0
0
★
S curve acceleration and deceleration A
1
S curve acceleration and deceleration B
2
Select the frequency change mode in the process of start/stop.
0: Linear acceleration and deceleration.The output frequency increases or decreases
linearly. PI9000 provides four kinds of acceleration and deceleration time. You can select by the
multi-function digital input terminals (F1.00 to F1.08).
1: S curve acceleration and deceleration A,The output frequency increases or decreases at
the S curve. S-curve is used for the occasion that requires to gently start or stop, such as
elevators, conveyor belts, etc.. The function code F3.14 and F3.15 respectively defined the
proportion of S curve start-section and the proportion of S curve end-section.
2: S curve acceleration and deceleration B,In the mode of S curve acceleration and
deceleration B, the motor rated frequency fb is always the inflection point of S curve. Usually
used for the occasion of high-speed regional above the rated frequency that requires rapid
acceleration and deceleration.
When the setting frequency is over than the motor’s rated frequency, ac/deceleration time
is:
t
=
(
4
9
f
fb
)
2
+
T
4
9
F is the setting frequency, fb is the rated frequency of motor, T is the acceleration time
from 0 to the rated frequency fb.
F3.14
Proportion of S curve start-section
0.0%～(100.0%~F3.15)
30.0%
★
F3.15
Proportion of S curve end-section
0.0%～(100.0%~F3.14)
30.0%
★
Set frequency f
Time t
Output frequency Hz
t1
t2
t1
t2
Figure 5-9:
Schematic diagram of S curve plus deceleration A