Instruction manual

4-110
P04
Motor 1 (Auto-tuning)
The inverter automatically detects the motor parameters and saves them in its internal memory. Basically, it is not
necessary to perform tuning when using a HP rating motor with a standard connection with the inverter.
There are three types of auto-tuning as listed below. Select appropriate one considering the limitations in your
equipment and control mode.
Data for P04
Auto-tuning
Operation
Motor parameters to be tuned
0
Disable
N/A
N/A
1
Tune while the
motor stops
The inverter performs
tuning while the motor is
stopped.
Primary resistance (%R1) (P07)
Leakage reactance (%X) (P08)
Rated slip frequency (P12)
%X correction factors 1 and 2 (P53 and
P54)
2
Tune while the
motor is rotating
under V/f control
After tuning while the motor
is stopped, the inverter
performs tuning again, with
the motor running at 50% of
the base frequency.
No-load current (P06)
Primary resistance (%R1) (P07)
Leakage reactance (%X) (P08)
Rated slip frequency (P12)
Magnetic saturation factors 1 to 5 (P16 to
P20)
Magnetic saturation extension factors "a" to
"c" (P21 through P23)
%X correction factors 1 and 2 (P53 and
P54)
3
Tune while the
motor is rotating
under vector
control
After tuning while the motor
is stopped, the inverter
performs tuning, with the
motor running at 50% of the
base frequency twice.
No-load current (P06)
Primary resistance (%R1) (P07)
Leakage reactance (%X) (P08)
Rated slip frequency (P12)
Magnetic saturation factors 1 to 5 (P16 to
P20)
Magnetic saturation extension factors "a" to
"c" (P21 to P23)
%X correction factors 1 and 2 (P53 and
P54)

For details of auto-tuning, refer to Chapter 5, "Check Motor Rotation and Direction".
In any of the following cases, perform auto-tuning since the motor parameters are different from those of
standard motors so that the best performance cannot be obtained under some controls.
• The motor to be driven is a non-standard motor.
• Cabling between the motor and the inverter is long. (Generally, 66 ft (20 m) or longer)
• A reactor is inserted between the motor and the inverter.
 Functions that are affected by motor parameters in running capability
Function
Related function codes (representative)
Auto torque boost
F37
Output torque monitor
F31, F35
Load factor monitor
F31, F35
Auto energy saving operation
F37
Torque limiter
F40, F41
Anti-regenerative control (Automatic deceleration)
H69
Auto search
H09
Slip compensation
F42
Dynamic torque control
F42
Droop control
H28
Torque detection
E78 to E81
Vector control without/with speed sensor
F42
Brake Signal (Brake-OFF torque)
J95