Offline Auto Tuning For A Frequency Search - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

CAUTION
• An IPM motor is a motor with interior permanent magnets. High voltage is generated at motor terminals while the motor
is running.
Do not touch motor terminals and other parts until the motor stops to prevent an electric shock.
• When the automatic restart after instantaneous power failure function is selected, the motor suddenly starts (after reset
time passes) when an instantaneous power failure occurs.
Stay away from the motor and machinery.
Apply the supplied CAUTION stickers to easily visible places when automatic restart after instantaneous power failure
has been selected.
Parameters referred to
Pr.13 Starting frequencypage
Pr.65, Pr.67 to Pr.69 Retry
Pr.78 Reverse rotation prevention
Pr.178 to Pr.189 (Input terminal function
Pr.882 Regeneration avoidance operation

5.14.16 Offline auto tuning for a frequency search

V/F V/F V/F PM PM PM
Under V/F control or when driving the IPM motor MM-CF, the accuracy of the "frequency search", which is used to detect the
motor speed for the automatic restart after instantaneous power failure and flying start, can be improved.
Pr. Name
Automatic restart after
162
instantaneous power
A700
failure selection
298
Frequency search gain 9999
A711
560 Second frequency
A712 search gain
96 Auto tuning setting/
C110 status
90
Motor constant (R1)
C120
463 Second motor auto
C210 tuning setting/status
458 Second motor
C220 constant (R1)
*1 For the FR-A820-03160(55K) or lower, and FR-A840-01800(55K) or lower.
*2 For the FR-A820-03800(75K) or higher, and FR-A840-02160(75K) or higher.
606
5. PARAMETERS
5.14 (A) Application parameters
363, page 364
functionpage 405
selectionpage 386
selection)page 496
selectionpage 696
Initial
Setting range
value
0
1
2
3
0
10
11
12
13
0 to 32767
9999
0 to 32767
9999
9999
0
1, 101
0
11
0 to 50 Ω, 9999
9999
0 to 400 mΩ, 9999
0
1, 101
0
11
0 to 50 Ω, 9999
9999
0 to 400 mΩ, 9999
Frequency search only performed at the first start
Reduced voltage start only at the first start (no frequency search)
Encoder detection frequency search
Frequency search only performed at the first start (reduced impact
restart)
Frequency search at every start
Reduced voltage start at every start (no frequency search)
Encoder detection frequency search at every start
Frequency search at every start (reduced impact restart)
The offline auto tuning automatically sets the gain required for the
frequency search.
The constant value of Mitsubishi Electric motor (SF-PR, SF-JR, SF-
HR, SF-JRCA, SF-HRCA, or MM-CF) is used.
The offline auto tuning automatically sets the gain required for the
frequency search of the second motor.
The constant value of Mitsubishi Electric motor (SF-PR, SF-JR, SF-
HR, SF-JRCA, SF-HRCA, or MM-CF) is used for the second motor.
No offline auto tuning
Offline auto tuning is performed under Advanced magnetic flux vector
control, Real sensorless vector control, or Vector control. (Refer to
page 509.)
Offline auto tuning is performed without rotating the motor (for IPM
motor MM-CF).
Tuning data
*1
(The value measured by offline auto tuning is automatically set.)
9999: The constant value of Mitsubishi Electric motor (SF-PR, SF-JR,
*2
SF-HR, SF-JRCA, SF-HRCA and so on) is used.
No auto tuning for the second motor.
Offline auto tuning is performed for the second motor. (Refer to
509.)
Offline auto tuning is performed without rotating the second motor
(under V/F control or PM sensorless vector control (IPM motor MM-
CF)).
*1
Tuning data of the second motor
(The settings are the same as those in Pr.90.)
*2
Description
page