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Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 226

Fr-a800 series.
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 Initializing the parameters required for the PM sensorless vector control
(Pr.998)
• PM parameter initialization sets parameters required for driving an IPM motor MM-CF.
• The offline auto tuning enables the operation with an IPM motor other than MM-CF and with SPM motors.
• Two MM-CF PM parameter initialization methods are available; setting Pr.998 PM parameter initialization, and selecting
IPM initialization ("
Initial
Pr.
Name
value
998
PM parameter
0
E430
initialization
• To use a motor capacity that is one rank lower than the inverter capacity, set Pr.80 Motor capacity before performing PM
parameter initialization.
• When Pr.998 = "3003, 8009, or 9009", the monitor is displayed and the frequency is set using the motor rotations per
minute. To use frequency to display or set, set Pr.998 = "3103, 8109, or 9109".
• Set Pr.998 = "0" to change the PM sensorless vector control parameter settings to the parameter settings required to drive
an induction motor.
• When using an IPM motor or SPM motor other than MM-CF, set Pr.998 = "8009, 8109, 9009, or 9109".
NOTE
• Make sure to set Pr.998 before setting other parameters. If the Pr.998 setting is changed after setting other parameters, some
of those parameters are initialized too. (Refer to "PM parameter initialization list" for the parameters that are initialized.)
• To change back to the parameter settings required to drive an induction motor, perform Parameter clear or All parameter clear.
• If the setting of Pr.998 PM parameter initialization is changed between "3003, 8009, 9009 (rotations per minute)" ↔ "3103,
8109, 9109 (frequency)", the target parameters are respectively set to their initial values.
The purpose of Pr.998 is not to change the display units. Use Pr.144 Speed setting switchover to change the display units
between rotations per minute and frequency. The parameter enables switching of display units between rotations per minute
and frequency without initializing the parameter settings.
Example) Changing the Pr.144 setting between "6" and "106" switches the display units between frequency and rotations per
minute.
• For an inverter out of the capacity range of the IPM motor MM-CF, "3003 or 3103" cannot be set. (Refer to
capacities of MM-CF motors.)
• The PM parameter initialization (Pr.998) changes parameter settings for the first motor. When a PM motor is used as the
second motor, parameters for the second motor must be set individually.
 PM parameter initialization list
• The parameter settings in the following table are changed to the settings required to perform PM sensorless vector control
by selecting the IPM initialization on the operation panel or by using Pr.998 PM parameter initialization. The changed
settings differ according to the specification (capacity) of the PM motor used.
") on the operation panel.
Setting
range
Parameter settings for an induction motor
0
(frequency)
parameter settings for MM-CF IPM motor
3003
(rotations per minute)
parameter settings for MM-CF IPM motor
3103
(frequencies)
The parameter settings required to drive an
8009
IPM motor other than MM-CF are set.
(rotations per minute) (after tuning)
The parameter settings required to drive an
8109
IPM motor other than MM-CF are set.
(frequency) (after tuning)
The parameters settings required to drive
an SPM motor are set. (rotations per
9009
minute)
(after tuning)
The parameters settings required to drive
9109
an SPM motor are set. (frequency)
(after tuning)
Description
The parameter settings required to drive
an induction motor are set.
The parameters settings required to drive
an IPM motor are set.
The parameters settings required to drive
an IPM motor are set. (Set Pr.71 Applied
motor and perform offline auto tuning in
advance. (Refer to
page
The parameters settings required to drive
an SPM motor are set. (Set Pr.71 Applied
motor and perform offline auto tuning in
advance. (Refer to
page
5. PARAMETERS
5.2 Control method
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519.))
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page 798
for the
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