Function Applications
-484-
Note
Improper PI parameter settings may lead to a high overshoot. Even worse, overvoltage may occur when overshoot
drops.
Increasing the value of F2-07 can improve motor stability, but this may also slow dynamic response.
Decreasing it will bring faster system response but also motor oscillation if the value is too small. No
adjustment is required under normal circumstances.
Para.
No.
Name
Default
Value Range Description
F2-00
Low-speed
speed loop
Kp
30 1 to 200
This parameter indicates the speed loop PID control
parameter Kp, which affects the response to the
motor speed. A greater the Kp value indicates higher
adjustment sensitivity and adjustment intensity. A
smaller the Kp value indicates lower adjustment
sensitivity and adjustment intensity. The low-speed
speed loop Kp is used in the case of low speed.
F2-01
Low-speed
speed loop Ti
0.500s 0.001s to 10.000s
The reciprocal of the speed loop integral time
constant is the integral gain. The speed loop integral
time constant affects the steady-state speed error of
the motor and the stability of the speed loop system.
Increasing the speed loop integral time constant
slows down the response of the speed loop. In this
case, increase the speed loop proportional gain to
shorten the response time of the speed loop. The low-
speed speed loop Ti is used in the case of low speed.
F2-02
Switchover
frequency 1
5.00 Hz 0.00 to F2-05
The speed loop PI parameters are divided into two
groups: low speed and high speed. When the running
frequency is lower than switchover frequency 1 (F2-
02), the speed loop PI is adjusted by F2-00 and F2-01.
When the running frequency is higher than switchover
frequency 2 (F2-05), the speed loop PI is adjusted by
F2-03 and F3-04. When the running frequency falls
between switchover frequency 1 and switchover
frequency 2, PI parameters are obtained from linear
switchover between the two groups of PI parameters.
The value of this parameter must be smaller than
F2-05 (switchover frequency 2).
F2-03
High-speed
speed loop
Kp
20 1 to 200
This parameter indicates the speed loop PID control
parameter Kp, which affects the response to the
motor speed. A greater the Kp value indicates higher
adjustment sensitivity and adjustment intensity. A
smaller the Kp value indicates lower adjustment
sensitivity and adjustment intensity. The high-speed
speed loop Kp is used in the case of high speed.
F2-04
High-speed
speed loop Ti
1.00s 0.01s to 10.00s
The reciprocal of the speed loop integral time
constant is the integral gain. The speed loop integral
time constant affects the steady-state speed error of
the motor and the stability of the speed loop system.
Increasing the speed loop integral time constant
slows down the response of the speed loop. In this
case, increase the speed loop proportional gain to
shorten the response time of the speed loop. The high
speed loop Ti is used in the case of high speed.
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