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Initializing The Parameters Required To Drive An Ipm Motor (pr.998)
Air-conditioning inverter.
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Parameters referred to
Pr.60 Energy saving control selection
Pr.72 PWM frequency selection
Pr.190 or Pr.192 (Output terminal function selection)
Pr. 261 Power failure stop selection
Pr.653 Speed smoothing control
Pr.800 Control method selection
4.3.2
Initializing the parameters required to drive an IPM motor (Pr.998)
By performing IPM parameter initialization, IPM motor control is selected and the parameters, which are
required to drive an IPM motor, are changed. Initial settings and setting ranges of the parameters are adjusted
automatically to drive an IPM motor.
Initialization is performed by setting Pr.998 IPM parameter initialization or by choosing the mode on the operation
panel.
Parameter
Name
Number
998
IPM parameter
initialization
....Specifications differ according to the date assembled. Refer to page 346 to check the SERIAL number.
(1)
IPM parameter initialization (Pr.998)
By performing IPM parameter initialization, initial settings required to drive an IPM motor can be set in parameters.
When Pr. 998 = "1, or 12" 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 = "101 or 112."
Set Pr. 998 = "0" to change the parameter settings from the settings required to drive an IPM motor to the settings
required to drive a general-purpose motor.
Pr.998 Setting
0
Parameter settings for a general-purpose motor (frequency)
Parameter settings for a high-efficiency IPM motor MM-EF
1
(rotations per minute)
Parameter settings for a premium high-efficiency IPM motor MM-
12
EFS (rotations per minute)
Parameter settings for a high-efficiency IPM motor MM-EF
101
(frequency)
Parameter settings for a premium high-efficiency IPM motor MM-
112
EFS (frequency)
REMARKS
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 "(2) IPM parameter initialization list" for the parameters that are initialized.)
To change back to the parameter settings required to drive a general-purpose motor, perform parameter clear or all parameter
clear.
If the setting of Pr.998 IPM parameter initialization is changed from "1, 12 (rotations per minute)" to "101, 112 (frequency)," or
from "101, 112" to "1, 12," all the target parameters are initialized.
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.
Refer to page 174
Refer to page 181
Refer to page 140
Refer to page 168
Refer to page 182
Refer to page 88
Initial
Setting
value
range
Parameter settings for a general-
0
purpose motor (frequency)
Parameter settings for a high-efficiency
1
IPM motor MM-EF
(rotations per minute)
Parameter settings for a premium high-
0
12
efficiency IPM motor MM-EFS
(rotations per minute)
Parameter settings for a high-efficiency
101
IPM motor MM-EF
(frequency)
Parameter settings for a premium high-
112
efficiency IPM motor MM-EFS
(frequency)
Description
IPM motor control <IPM>
IPM
IPM
IPM
Description
Initial parameter
settings required to
drive a general-purpose
motor are set.
Initial parameter
settings required to
drive an IPM motor are
set.
Operation in the parameter setting
mode of the operation panel
(IPM)"  Write "0"
"
(IPM)"  Write "1"
"
(IPM)"  Write "12"
"
Invalid
Invalid
< I P M >
4
85

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