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10. Advanced functions
10.8 Auto tuning
Group LED Display Parameter Name
Set
value
Min/Max
Range
Factory
Defaults
Unit
H41 [Auto tuning] 1
0/1 0
-
H42
[Stator resistance (Rs)]
- 0/14.0 -
Ω
Function
group 2
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 Prog/Ent (•) 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 H93 – [Parameter initialize] is done, the preset
value corresponding to motor type (H30) will be displayed.
Press the STOP/RST key on the keypad or turn on the BX terminal to stop the Auto
Tuning.
If Auto tuning of H42 and H44 is interrupted, the preset value will be used.
See page 10-12 for motor preset parameter 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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