# Mitsubishi Electric FR-A820-00046 Instruction Manual Page 631

Parameters
● Set a given value as the motor constant parameter. The displayed increments of the read motor
constants can be changed with Pr. 684 "Tuning data unit switchover".
First
motor
Pr.
82
90
91
92
93
94
859
298
Tab. 5-183: Parameter setting ranges
For the FR-A820-03160(55K) lower and FR-A840-01800(55K) or lower.
For the FR-A820-03800(75K) or higher and FR-A840-02160(75K) or higher.
NOTES
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:
Setting example:
To slightly increase the Pr. 90 value (5%)
If Pr. 90 = "2516" is displayed, the value is calculated with 2516 × 1.05 = 2641.8.
Therefore set Pr. 90 = "2642".
(The value displayed has been converted into a value for internal use. Hence, simple addition of a
given value to the displayed value has no significance.)
If "9999" is set, tuning data will be invalid and the constant values for Mitsubishi motors (SF-PR,
SF-JR, SF-HR, SF-JRCA, SF-HRCA and SF-V5RU (1500 r/min series) and so on) are used.
FR-A800
Second
motor
Name
Pr.
Motor excitation
455
current
458
Motor constant (R1)
459
Motor constant (R2)
Motor constant (L1)/
460
d-shaft inductance
(Ld)
Motor constant (L2)/
461
q-shaft inductance
(Lq)
462
Motor constant (X)
Torque current/
860
Rated PM motor
current
Frequency search
560
gain
Pr. 684 = 0 (initial value)
Setting
Setting range
increments
0 to ***, 9999
1
0 to 32767, 9999
1
(C) Motor constant parameters
Pr. 684 = 1
Unit
Range indication
indication
0 to 500 A, 9999
0.01 A
0 to 3600 A, 9999
0.1 A
0 to 50 Ω, 9999
0.001 Ω
0 to 400 mΩ, 9999
0.01 mΩ
0 to 50 Ω, 9999
0.001 Ω
0 to 400 mΩ, 9999
0.01 mΩ
0 to 6000 mH, 9999
0.1 mH
0 to 400 mH, 9999
0.01 mH
0 to 6000 mH, 9999
0.1 mH
0 to 400 mH, 9999
0.01 mH
0.1%
0 to 100%, 9999
0.01%
0 to 500 A, 9999
0.01 A
0 to 3600 A, 9999
0.1 A
0 to 32767, 9999
1
Initial
value
9999
5 - 451