Mitsubishi Electric FR-A800 Series Instruction Manual page 232

 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 ("
Pr. Name
998 PM parameter
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 the "List of the target parameters for the motor parameter initialization".)
• 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. Using Pr.144 enables switching the unit between rotations per minute and
frequencies without initializing the setting of the motor parameters.
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.
 List of the target parameters for the motor parameter initialization
• 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.
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") on the operation panel.
Initial Setting
value range
0
3003
3103
8009
0
8109
9009
9109
search engine
Parameter setting (in frequencies) for an
induction motor
Parameter setting (in rotations per minute)
for the MM-CF IPM motor
Parameter setting (in frequencies) for the
MM-CF IPM motor
Parameter setting (in rotations per minute)
for an IPM motor other than MM-CF (after
tuning)
Parameter setting (in frequencies) for an
IPM motor other than the MM-CF (after
tuning)
Parameter setting (in rotations per minute)
for an SPM motor (after tuning)
Parameter setting (in frequencies) for an
SPM motor (after tuning)
Description
The setting of the motor parameters is
changed to the setting required to drive an
induction motor.
The setting of the motor parameters is
changed to the setting required to drive an
IPM motor.
The setting of the motor parameters is
changed to the setting required to drive an
IPM motor. (Set Pr.71 Applied motor
and perform offline auto tuning in
advance. (Refer to page
The setting of the motor parameters is
changed to the setting required to drive an
SPM motor. (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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