Mitsubishi Electronics FR-S500 Base frequency, base frequency voltage Pr.3 , Pr.19 , Pr.47

Explanation of functions (parameters)

2.3.3Base frequency, base frequency voltage (Pr.3 , Pr.19 , Pr.47 )

Used to adjust the inverter			voltage
the motor rating.
outputs (voltage, frequency) to
			Output	Pr.19	Output
					frequency (Hz)
					Pr.3
					Pr.47
Parameter	Name	Factory	Setting		Remarks
		Setting	Range
3	Base frequency	60Hz	0 to 120Hz		

19	Base frequency	- - -	0 to 800V,	888: 95% of power supply voltage (*1)
	voltage		888, - - -	- - -: Same as power supply voltage (*2)
				Setting is enabled when Pr. 30 = "1".
47	Second V/F	- - -	0 to 120Hz,	- - -: Function invalid
	(base frequency)		- - -	Setting is enabled when Pr. 30 = "1".

*1. 1.9 times greater than the power supply voltage for the FR-S510WE-0.1K to 0.75K.

*2. Twice greater than the power supply voltage for the FR-S510WE-0.1K to 0.75K.

<Setting>

•In Pr. 3 and Pr. 47, set the base frequency (motor's rated frequency).

Use the RT signal to switch between these two different base frequencies. (Turn on the RT signal to make Pr. 47 valid.) (*)

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

If only "50Hz" is given on the motor rating plate as the frequency, always set the "base frequency" to "50Hz". If it remains at "60Hz", the voltage may become too low and torque shortage occurs, resulting in an overload trip. Special care must be taken when "1" is set in Pr. 14 "load pattern selection".

•Set the base voltage (e.g. rated voltage of motor) in Pr. 19.

CAUTION

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

2.When automatic torque boost is selected, Pr. 47 is invalid. When automatic torque boost is selected, setting "- - -" or "888" in Pr. 19 uses the rated output voltage.

REMARKS

*The RT signal serves as the second function selection signal and makes the other second functions valid.

♦Related parameters♦

•When rated motor frequency is "50Hz" ⇒ Pr. 14 "load pattern selection" (refer to page 73)

•RT signal (second function "Pr. 47") setting ⇒ Pr. 60 to Pr. 63 (input terminal function selection) (refer to page 98)

•Motor setting ⇒ Pr. 71 "applied motor" (refer to page 69)

•Automatic torque boost selection ⇒ Pr. 98 "automatic torque boost selection (motor capacity)" (refer to page 121)

2

FUNCTIONS

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