8-13
Sleep Freq
Wake up level
PID Reference
PID Feedback
Output
frequency
RUN command
PID Active
Sleep Delay
8.8 Auto-tuning
Group Display Parameter Name Setting Range Default Unit
Function
group 2
H41 [Auto tuning] 1
0 ~ 1 0 -
H42 [Stator resistance (Rs)] - 0 ~ 28 -
Ω
H44
[Leakage inductance (Lσ)]
- 0 ~ 300.00 - mH
Automatic measuring of the motor parameters is provided.
The measured motor parameters in H41 can be used in Auto Torque Boost and
Sensorless Vector Control.
CAUTION
Auto tuning should be executed after stopping the motor. Motor shaft must not run by the load
during H41 – [Auto tuning].
H41: When H41 is set to 1 and press the Enter (z) key, Auto tuning is activated and “TUn” will
appear on the LED keypad. When finished, “H41” will be displayed.
H42, H44: The values of motor stator resistance and leakage inductance detected in H41 are
displayed, respectively. When Auto tuning is skipped or H93 – [Parameter initialize] is done, the
default value corresponding to motor type (H30) will be displayed.
Press the STOP/RST key on the keypad or turn on the EST terminal to stop the Auto Tuning.
If Auto tuning of H42 and H44 is interrupted, the default value will be set. If H42 and H44 are
finished and auto-tuning of leakage inductance is interrupted, the measured value of H42 and
H44 are used and the default of leakage inductance is set.
See page 8-16 for motor parameter default values.
CAUTION
Do not enter any incorrect value as stator resistance and leakage inductance. Otherwise,
the function of Sensorless vector control and Auto torque boost could be deteriorated.
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