Mitsumi electronic FR-F520-0.75K, 55K Base frequency, base frequency voltage Pr , Pr , Pr, 8888

PARAMETERS

4.2.3 Base frequency, base frequency voltage (Pr. 3, Pr. 19, Pr. 47)

Pr. 3 "base frequency"

Pr. 19 "base frequency voltage"

Pr. 47 "second V/F (base frequency)

Related parameters

Pr. 14 "load pattern selection" Pr. 71 "applied motor"

Pr. 180 to Pr. 186 (input terminal function selection)

Used to adjust the inverter outputs (voltage, frequency) to the motor rating.

#When running a standard motor, generally set the rated motor frequency. When running the motor using the commercial power supply-inverter switch-over, set the base frequency to the same value as the power supply frequency.

#If the frequency given on the motor rating plate is "50Hz" only, always set to "50Hz".

Leaving it as "60Hz" may make the voltage too low and the torque less, resulting in overload tripping. Care must be taken especially when Pr. 14 "load pattern selection" = 1.

Parameter	Factory	Setting Range	Remarks
Number	Setting
3	60Hz 〈 50Hz〉	0 to 120Hz
			8888: 95% of power
19	9999 〈 8888〉	0 to 1000V,	supply voltage
		8888, 9999	9999: Same as power
			supply voltage
47	9999	0 to 120Hz, 9999	9999: Function invalid

voltage
Output	Pr.19
	Output frequency (Hz)
	Pr.3
	Pr.47

<Setting>

•Use Pr. 3 and Pr. 47 to set the base frequency (rated motor frequency).

•Pr. 47 "Second V/F (base frequency)" is valid when the RT signal is on. (Note 3)

•Use Pr. 19 to set the base voltage (e.g. rated motor voltage).

Note: 1. Set 60Hz in Pr. 3 "base frequency" when using a constant-torque motor.

2.When "2" (5-point flexible V/F characteristics) is set in Pr. 71, the Pr. 47 setting is made invalid.

3.The RT signal serves as the second function selection signal and makes the other second functions valid. Refer to page 138 for Pr. 180 to Pr. 186 (input terminal function selection).

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