Parameters referred to
Pr.9 Electronic thermal O/L
Pr.178 to Pr.189 (Input terminal function
Pr.800 Control method
5.13.4 Online auto tuning
Magnetic flux Sensorless
If online auto tuning is selected under Advanced magnetic flux vector control, Real sensorless vector control, or Vector control,
favorable torque accuracy is retained by adjusting temperature even when the resistance value varies due to increase in the
Online auto tuning selection
Second motor online auto tuning
Online auto tuning at startup (Pr.95/Pr.574 = "1")
• By promptly tuning the motor status at startup, accurate operation without being affected by motor temperature is achieved.
Also high torque can be provided at very low speed and stable operation is possible.
• Under Advanced magnetic flux vector control (Pr.80 Motor capacity, Pr.81 Number of motor poles) or Real sensorless
(Pr.80, Pr.81, Pr.800 Control method selection), select the online auto tuning at start.
• Make sure to perform offline auto tuning before performing online auto tuning.
Perform offline auto tuning. (Refer to
Check that Pr.96 Auto tuning setting/status = "3 or 103" (offline auto tuning completion).
Set Pr.95 Online auto tuning selection = "1" (online auto tuning at start).
Online auto tuning is enabled at the next start.
Check that the following parameters are set before starting operation.
If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies may deteriorate due
to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
In the PU operation mode, press
For External operation, turn ON the start command (STF signal or STR signal).
0 to 2
Rated motor current or electronic thermal O/L relay
Motor capacity (with the rated motor current equal to or less than the inverter rated current)
Number of motor poles
on the operation panel.
No online auto tuning
Online auto tuning is performed at startup.
Magnetic flux observer (continuous tuning)
Select online auto tuning for the second motor.
(The settings are the same as those in Pr.95.)
5.13 (C) Motor constant parameters