STEP ET Series - Page 107

Chapter 7 Parameter Explanation
ET/EP/EH Series Intelligent Flexible Driver Manual
- 97 -
Function code
Name
Setting range
Factory setting
P20.05
Rated voltage of motor 1 (V)
0~690
/
P20.06
Number of poles of motor 1
2~128
/
P20.07
Rated slip frequency of motor 1
(Hz)
0.10~50.00
/
P20.00 Motor type:0: asynchronous motor.
P20.01 - P20.07 and P20.11 are used to set the parameters of the motor driven by the inverter, which
need to be set correctly according to the motor nameplate before use.
P20.06 is used to set the number of motor poles, which is set according to the nameplate. If there is
no motor pole number parameter on the nameplate, it can be calculated according to the following
equation.
Number of poles = (120×f)÷n
Where: n - rated speed; f - rated frequency.
For the calculated value, the even integer should be taken as the "number of poles".
Note: The inverter power level should be matched with the motor.
P20.07 is used to set the slip frequency.
If there is no slip frequency data on the motor nameplate, the value of P20.07 can be calculated by
the following equation.
If the rated frequency is set to be f(P20.03), the rated velocity is set to be n (P20.04), and the number
of motor poles is set to be p(P20.06):
Slip frequency = f-((n×p)÷120
Example: The rated frequency is 50Hz, the rated speed is 1430rpm, and the motor pole number is 4,
the set value of P20.07 = 50 - ((1430×4) ÷ 120) = 2.33Hz.
Function code
Name
Setting range
Factory setting
P20.08
Maximum slip frequency of
motor 1 (Hz)
0.10~50.00
2.80
P20.09
Phase sequence of motor 1
0~1
1
P20.10
No-load current coefficient of
motor 1 (%)
0.10~100.00
30.00
P20.08 is used to set maximum slip frequency of motor, generally 2 times the rated slip frequency.
P20.09: motor rotation direction, 0 is rotation with negative phase sequence and 1 is rotation with
positive phase sequence.
P20.10 is used to set no-load current coefficient of motor, generally around 30%.
Function code
Name
Setting range
Factory setting
P20.14
Type of motor 2
0~1
0
P20.15
Rated power of motor 2 (kW)
0.00~655.35
P20.16
Rated current of motor 2 (A)
0.0~1000.0
P20.17
Rated frequency of motor 2 (Hz)
0.00~500.00
50
P20.18
Rated speed of motor 2 (rpm)
0~50000
1460
P20.19
Rated voltage of motor 2 (V)
0~690
380
P20.20
Number of poles of motor 2
2~128
4
P20.21
Rated slip frequency of motor 2
(Hz)
0.10~50.00
1.40
P20.22
Maximum slip frequency of
motor 2 (Hz)
0.10~50.00
2.80