Mitsubishi Electric FR-A820-00046 Instruction Manual page 252

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 "IPM 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 "3003, 8009, 9009 (rota-
tions 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 set-
ting 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 initializ-
ing 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 8-8 for the capacities of MM-CF motors.)
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Parameters