Mitsubishi Electric 800 Series Instruction Manual page 315

NOTE
• As the motor constants measured in the offline auto tuning have been converted into internal data (****), refer to the following
setting example when making setting. (The value displayed has been converted into a value for internal use. Therefore, simple
addition of a value to the displayed value does not bring the desired effect.)
Setting example: to slightly increase the Pr.90 value (5%)
When "2516" is displayed for Pr.90, set 2642 (2516 × 1.05 = 2641.8) in Pr.90.
• If "9999" is set in the motor constant parameters, tuning data will be invalid and the inverter internal constant is used.
• To change a motor induced voltage constant of PM motors, the setting in Pr.706 Induced voltage constant (phi f) or Pr.738
Second motor induced voltage constant (phi f) must be changed. If the constant after the change exceeds the setting range
of Pr.706 or Pr.738 (0 to 5000 mV (rad/s)), set Pr.1412 Motor induced voltage constant (phi f) exponent or Pr.1413
Second motor induced voltage constant (phi f) exponent. Set a value in the exponent n in the formula, Pr.706 (Pr.738) ×
n
10 [mV (rad/s)], to set the induced voltage constant (phi f).
• When Pr.71 (Pr.450) = "8093 or 9093", or Pr.1412 (Pr.1413) = "9999", the motor induced voltage constant is as set in Pr.706
(Pr.738). (No exponent setting)
Parameters referred to
Pr.9 Electronic thermal O/L
Pr.71 Applied motorpage 294
Pr.178 to Pr.189 (Input terminal function
314
13. (C) Motor Constant Parameters
13.3 Offline auto tuning for a PM motor (motor constant tuning)
relaypage 198
selection)page 283