5.Description of Function Codes
EM12 User's Manual
100
frequency inverter at low frequency by modifying d2-01.
If the torque boost is set to too large, the motor is easily overheated, and the frequency inverter easily suffers over
current.
If the load is large and the motor startup torque is insufficient, increase the value of d2-01. If the load is small,
decrease the value of d2-01. If it is set to 0.0, the frequency inverter performs automatic torque boost. In this case,
the frequency inverter automatically calculates the torque boost value based on motor parameters including the
stator resistance.
d2-02 specifies the frequency under which torque boost is valid. Torque boost becomes invalid when this
frequency is exceeded, as shown in the following figure.
Diagram 5-31 Manual torque boost
d2-03
Multi-point V/F frequency 1 (F1)
Default
0.00 Hz
Setting Range
0.00 Hz ~ d2-05
d2-04
Multi-point V/F voltage 1 (V1)
Default
0.0%
Setting Range
0.0%~100.0%
d2-05
Multi-point V/F frequency 2 (F2)
Default
0.00 Hz
Setting Range
d2-03 to d2-07
d2-06
Multi-point V/F voltage 2 (V2)
Default
0.0%
Setting Range
0.0%~100.0%
d2-07
Multi-point V/F frequency 3 (F3)
Default
0.00 Hz
Setting Range
d2-05 ~ maximum frequency
d2-08
Multi-point V/F voltage 3 (V3)
Default
0.0%
Setting Range
0.0%~100.0%
When d2-00 set to 1, these six parameters are used to define the multi-point V/F curve.
The multi-point V/F curve is set based on the motor's load characteristic. The relationship between voltages and
frequencies is: V1 < V2 < V3, F1 < F2 < F3. Diagram 6-32 shows the setting of multi-point V/F curve.
Summary of Contents for EM12 Series
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