5.3 Description of Function Codes 5.3.4 P codes (Motor 1 parameters)
In any of the following cases, perform auto-tuning since the motor parameters are different from those of
Fuji standard motors so that the best performance cannot be obtained under some conditions. In cases
such as this, perform auto tuning.
• The motor to be driven is a non-Fuji motor or a non-standard motor.
• The wiring distance between the inverter and the motor is too long (generally 20 m or more).
• A reactor is inserted between the motor and the inverter.
Other applicable cases
If P04 = 2, or tuning is performed under vector control with permanent magnet type speed sensor (F42 =
16), the motor may be driven in the opposite direction from the command direction. If this is not
permissible, set the H08 rotation direction restriction.
Functions whose performance is affected by the motor parameters
Related function codes (representative)
Auto energy saving operation
Anti-regenerative control
Dynamic torque vector control
Dynamic torque vector control with sensor
Vector control with speed sensor
Sensorless vector control
Sensorless vector control (synchronous motors)
Vector control with sensor (synchronous motors)
Brake signal (Brake-release torque)
When vector control without speed sensor (dynamic torque vector) or slip compensation control is used for long-
time operation, the motor parameters change along with motor temperature rise.
If motor parameters change, the amount of speed compensation may change to cause the motor speed to be
different from the initial speed.
Enabling online tuning allows the identification of the motor parameters that match the change in the motor
temperature, which minimizes the motor speed variation.
To use this function, specify “2” for auto-tuning (P04).
Online tuning is enabled only when F42 = 1 (Vector control without speed sensor) or F42 = 2 (V/f control
with slip compensation active) and F37 = 2, 5 (auto torque boost).
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