Mitsubishi FR-A800

Control method
PARAMETERS
173
5
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 IPM parameter initialization methods are available; setting Pr.998 PM parameter initialization, and selecting
(IPM parameter initialization) mode on the operation panel.
• To use a motor capacity that is one rank lower than the inverter capacity, set Pr.80 Motor capacity before performing IPM
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 other than MM-CF, set Pr.998 = "8009, 8109, 9009, or 9109". The setting can be made after
performing offline auto tuning.
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 will be initialized too. (Refer to "(3) 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. Pr.144 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 page 694 for the
capacities of MM-CF motors.)
Pr. Name
Initial
value
Setting
range
Description
998
E430
PM parameter
initialization
0
0
Parameter settings for an induction motor
(frequency)
The parameter settings required
to drive an induction motor are
set.
3003
For IPM motor MM-CF.
Parameter setting (rotations per minute)
The parameters settings
required to drive an IPM motor
are set.
3103
For IPM motor MM-CF.
Parameter setting (frequency)
8009
The parameters settings required to drive
an IPM motor other than MM-CF are set.
(rotations per minute)(after tunning)
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 452.))
8109
The parameters settings required to drive
an IPM motor other than MM-CF are set.
(frequency)(after tunning)
9009
The parameters settings required to drive
an SPM motor are set. (rotations per
minute)(after tunning)
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 452.))
9109
The parameters settings required to drive
an SPM motor are set.
(frequency)(after tunning)