STEP ET Series - Group P2 X Motor Parameters; P20 Group General Parameter

Chapter 7 Parameter Explanation
Shanghai Sigriner STEP Electric Co., Ltd.
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Bit 0: Voltage curve auto adjust, automatically adjust output voltage according to the load.
Bit 1: Low velocity voltage compensation, can improve low-speed load capacity.
Bit 2: Shock suppression, control motor vibration when carrying light load operation.
Bit 3: Stator resistance compensation, stator resistance voltage compensation, which improves
low-speed load capacity.
Bit 8: energy saving mode, after enabling energy saving operation, when there’s no load, the motor
operates according to the voltage curve corresponding to the back electromotive force. When fully
loaded, the motor operates according to the curve corresponding to the rated voltage. This way, it
can reduce motor current during light load, and also increase efficiency.
GVC debugging steps:
First step: If used for the first time, please reset inverter’s parameter. The default is GVC (P10.00=0),
then set motor nameplate parameter to group P20.
Second step: During the occasion of heavy load start up, set the self-learning to the stator resistance;
otherwise set stator resistance to zero.
Third step: To get a better control effect, you can do a complete motor static self-learning, after
which can acquire a relatively accurate stator resistance P21.01 and vibration rejection gain P17.05.
GVC common debugging questions and solutions:
Question one: The starting current has a large impact
1. Check if stator resistance P21.01 is accurate. Do a stator resistance
self-learning.
2. Adjust the DC injection current during start up and make it close to actual
no-load current.
3. Increase P17.05 vibration rejection gain; Increase 0.5 each time; The default
is 2.00.
4. Increase low-velocity voltage compensation gain P17.03 (reference range
1%-5%).
5. Enable constant current output (external synchronization) function; set
P17.04 external synchronization frequency switching point.
Question two: Over current or over voltage when the load suddenly reduces:
1. Reduce vibration rejection gain P17.05
Question three: Motor loses control and dynamic capability deteriorates when load increases
suddenly:
1. During low-speed situation, you can increase low-velocity voltage
compensation gain P17.03.
2. Reduce vibration rejection gain P17.05.
7.4 Group P2X Motor parameters
7.4.1 P20 group General parameter
Function code
Name
Setting range
Factory setting
P20.00
Type of motor 1
0~2
0
P20.01
Rated power of motor 1 (kW)
0.00~655.35
/
P20.02
Rated current of motor 1 (A)
0.0~1000.0
/
P20.03
Rated frequency of motor 1 (Hz)
0~500.00
/
P20.04
Rated speed of motor 1 (rpm)
0~60000
/