Mitsubishi Electronics FR-S500 Biases and gains of the frequency setting voltage current

Explanation of functions (parameters)

2.3.18Biases and gains of the frequency setting voltage (current)

(Pr. 38 , Pr. 39 , C2 to C7 )

You can set the magnitude (slope) of the output frequency as desired in relation to the external frequency setting signal (0 to 5V, 0 to 10V or 4 to 20mADC). The "bias" and "gain" functions are used to adjust the relationship between the input signal entered from outside the inverter to set the output frequency, e.g. 0 to 5V, 0 to 10V or 4 to 20mADC, and the output frequency.

			(Hz)	Factory setting
(	Pr.38	)
	Output frequency			2-5)
				(Across
				terminals
0Hz( C2 ) 0V
				5V or 10V	Pr.73
			(0% C3 *1)	(96% C4 *1)

Frequency setting voltage signal

	(Hz)	Factory setting
( Pr.39 )
Output	frequency		(Across
			terminals
			4-5)
0Hz( C5 )		4mA	20mA
		(20% C6 *1)	(100% C7 *1)
Frequency setting current signal

Parameter	Name	Factory Setting	Setting	Remarks
			Range
38	Frequency setting voltage gain	60Hz	1 to 120Hz
	frequency
39	Frequency setting current gain	60Hz	1 to 120Hz
	frequency
C2 (902) *2	Frequency setting voltage bias	0Hz	0 to 60Hz	Setting is enabled
	frequency
C3 (902) *2	Frequency setting voltage bias	0% *1	0 to 300%	when Pr. 30 = "1".
C4 (903) *2	Frequency setting voltage gain	96% *1	0 to 300%
C5 (904) *2	Frequency setting current bias	0Hz	0 to 60Hz
	frequency
C6 (904) *2	Frequency setting current bias	20% *1	0 to 300%
C7 (905) *2	Frequency setting current gain	100% *1	0 to 300%

*1.Factory settings may differ because of calibration parameters.

*2.The parameter number in parentheses is the one for use with the parameter unit (FR-PU04).

	POINT
•Bias setting for 0-5VDC (0-10VDC) input		Use calibration parameters C2, C3
		for setting.
•Gain setting for 0-5VDC (0-10VDC) input		Use Pr. 38, calibration parameter
		C4 for setting.
•Bias setting for 4-20mADC input		Use calibration parameters C5, C6
		for setting.
•Gain setting for 4-20mADC input		Use Pr. 39, calibration parameter
		C7 for setting.

(For 4 to 20mADC input, set "4" in any of Pr. 60 to Pr. 63 (input terminal function selection) and assign AU (current input selection) to any of terminals RH, RM, RL and STR, and turn on the AU signal.)

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