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IPM motor control <IPM>
4.3.2 Initializing the parameters required to drive an IPM motor (Pr.998)
<
IPM>
* This parameter allows its setting to be changed in any operation mode even if "0 (initial value)" is set in Pr. 77 Parameter write selection.
...............Specifications differ according to the date assembled. Refer to page 378 to check the SERIAL number.
(1) IPM parameter initialization (Pr.998)
· To use a 0.4kW MM-EF, set Pr. 80 Motor capacity = "0.4" before performing IPM parameter initialization. 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.
· 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
Number
Name
Initial
value
Setting
range
Description
998 *
IPM parameter
initialization
0
0
Parameter settings for a general-
purpose motor (frequency)
Initial parameter settings
required to drive a
general-purpose motor
are set.
1
Parameter settings for a
high-efficiency IPM motor MM-EF
(rotations per minute)
Initial parameter settings
required to drive an IPM
motor are set.
12
Parameter settings for a premium
high-efficiency IPM motor MM-EFS
(rotations per minute)
101
Parameter settings for a
high-efficiency IPM motor MM-EF
(frequency)
112
Parameter settings for a premium
high-efficiency IPM motor MM-EFS
(frequency)
Pr.998 Setting Description
Operation in the parameter
setting mode
0 Parameter settings for a general-purpose motor (frequency) "IPM" ⇒ Write "0"
1
Parameter settings for a high-efficiency IPM motor MM-EF
(rotations per minute)
"IPM" ⇒ Write "1"
12
Parameter settings for a premium high-efficiency IPM motor MM-EFS
(rotations per minute)
"IPM" ⇒ Write "12"
101 Parameter settings for a high-efficiency IPM motor MM-EF (frequency) Invalid
112
Parameter settings for a premium high-efficiency IPM motor MM-EFS
(frequency)
Invalid
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.
IPM
IPM
IPM