Mitsubishi Electric FR-F820-00077 Instruction Manual page 222

Control method
NOTES Make sure to set Pr. 998 before setting other parameters. If the Pr. 998 setting is changed after set-
ting other parameters, some of those parameters will be 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 parame-
ter clear or all parameter clear.
If the setting of Pr. 998 "PM parameter initialization" is changed between "12, 14, 8009, 9009 (rota-
tions per minute)" ⇔ "112, 114, 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 ini-
tializing 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-EFS/MM-THE4, "12, 14, 112 or 114"
cannot be set. (Refer to page 8-4 for the capacities of MM-EFS/MM-THE4 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.
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Parameters