Mitsubishi Electric FR-D720S SC EC Instruction Manual page 224

Selection and protection of a motor
6.7.3 To exhibit the best performance of the motor performance
(offline auto tuning) (Pr. 71, Pr. 80, Pr. 82 to Pr. 84, Pr. 90, Pr. 96)
The motor performance can be maximized with offline auto tuning.
What is offline auto tuning?
● When performing general-purpose magnetic flux vector control, the motor can be run with
the optimum operating characteristics by automatically measuring the motor constants
(offline autotuning) even when each motor constants differs, other manufacturer's motor is
used, or the wiring length is long.
Pr.
Name
No.
71
Applied motor
80
Motor capacity
Motor excitation
82
current
83
Rated motor voltage
Rated motor
84
frequency
90
Motor constant (R1)
Auto tuning setting/
96
status
The above parameters can be set when Pr. 160 = 0.
6 - 74
Initial
Setting Range Description
Value
0/1/3/13/23/40/
0
43/50/53
0.1–7.5kW
9999
9999
0–500A
9999
9999
200V class 200V
0–1000 V
400V class 400V
50Hz 10–120Hz
9999 0–50Ω/9999
0
11
0
21
By selecting a standard motor or
constant-torque motor, thermal
characteristic and motor con-
stants of each motor are set.
Applied motor capacity.
V/f control
Set motor excitation current
(no load current).
Uses the Mitsubishi motor
(SF-JR, SF-HR, SF-JRCA,
SF-HRCA) constants.
Set the rated motor voltage (V).
Set the rated motor frequency
(Hz).
Tuning data
(The value measured by offline
auto tuning is automatically set.)
9999: Uses the Mitsubishi motor
(SF-JR, SF-HR, SF-JRCA,
SF-HRCA) constants.
Offline auto tuning is not per-
formed
For general-purpose magnetic flux
vector control
Offline auto tuning is performed
without motor running.
(motor constant (R1) only)
Offline auto tuning for V/f control
(automatic restart after instanta-
neous power failure (with fre-
quency search))
Parameter
Refer to
Parameters referred to
Section
9 Electronic ther- 6.7.1
mal O/L relay
71 Applied motor 6.7.2
80 Motor capacity 6.2.2
156 Stall prevention 6.2.4
operation selec-
tion
178–182 Input terminal 6.9.1
function selection
190/ Output terminal 6.9.5
192/197 function selection