Vicruns 2S-0.4G-B, User Manual

Page: 149 / 300

Chapter 6 Description of Function Codes
Group P3: Vector control parameters
The P2 group function code is only valid for vector control, that is, P0-03=1 is valid, and P0-
03=2 is invalid.
P3-00 switching frequency 1 and P3-02 switching frequency 2, P3-04/P3-05, P3-06/P3-07
are the PI regulator parameters at low speed and high speed respectively, and the switching
relationship is shown in Figure 5-6. By setting the proportional coefficient and integral time of
the speed regulator, the speed dynamic response characteristics of the vector control can be
adjusted. Increasing the proportional gain and decreasing the integral time can speed up the
dynamic response of the speed loop. If the proportional gain is too large or the integral time is
too small, the system may oscillate.
Suggested adjustment method:
If the factory parameters can not meet the requirements, fine-tune on the basis of the factory
default parameters, first increase the proportional gain to ensure that the system does not
oscillate; then reduce the integral time, so that the system has faster response characteristics
and less overshoot.
Note: If the PI parameter is not set properly, it may cause the speed overshoot to be too larg-
e, and even cause an overvoltage fault when the overshoot falls back.
Function
code
Name
Description
(setting range)
Factory
Default
Change
P3-00 Switching frequency P1
0.00
～
P3-02
5.00 Hz
☆
P3-02 Switching frequency P2 P3-00
～
P0-14 10.00 Hz
☆
P3-04 Low frequency speed proportional gain 0.1 ～ 10.0 4.0
☆
P3-05 Low frequency speed integration time 0.01s ～ 10.00s 0.50s
☆
P3-06 High frequency speed proportional gain
0.1
～
10.0
2.0
☆
Fig.6-6 Schematic diagram of speed loop PI parameter switching
P3 - 00
F
3-02
Frequency
command
PI
parameters
（ P
3-04
，
P03-05
）
（ P
3-06
，
P03-07
）
C
h
a
p
te
r
6
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