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Frequency Setting Voltage (current) Bias And Gain (pr. 902 To Pr. 905) - Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual

Transistorized inverter, high function & low acoustic noise.
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Frequency setting voltage (current) bias and gain (Pr. 902 to Pr. 905)

Pr. 902 "frequency setting voltage bias"
Pr. 903 "frequency setting voltage gain"
Pr. 904 "frequency setting current bias"
Pr. 905 "frequency setting current gain"
You can set the output frequency as desired in relation to the frequency setting signal (0 to 5V, 0 to 10V or 4
to 20mA DC).
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 5VDC, 0 to 10VDC or 4 to 20mADC, and the output
frequency.
Use Pr. 902 to set the bias frequency at 0V.
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Use Pr. 903 to set the output frequency relative to the frequency command voltage set in Pr. 73.
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Use Pr. 904 to set the bias frequency at 4mA.
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Use Pr. 905 to set the output frequency relative to the 20mA frequency command current (4 to 20mA).
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Parameter
Factory Setting
Number
902
0V
60Hz 〈50Hz〉
903
5V
904
4mA
60Hz 〈50Hz〉
905
20mA
Pr.902
Pr.904
<Setting>
(1) The frequency setting voltage biases and gains may be adjusted in either of the following three ways:
1) Any point can be adjusted with a voltage applied across terminals 2-5.
2) Any point can be adjusted with no voltage applied across terminals 2-5.
3) Bias voltage is not adjusted.
(2) The frequency setting current biases and gains may be adjusted in either of the following three ways:
1) Any point can be adjusted with a current flowing at terminal 4.
2) Any point can be adjusted with no current flowing at terminal 4.
3) Bias current is not adjusted.
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Setting Range
0Hz
0 to 10V
0 to 60Hz
0 to 10V
1 to 400Hz
0Hz
0 to 20mA
0 to 60Hz
0 to 20mA
1 to 400Hz
Factory setting
60Hz
〈50Hz〉
Bias
0
Frequency setting signal
0
0
4
171
PARAMETERS
Related parameters
Pr. 20 "acceleration/deceleration
reference frequency"
Pr. 73 "0-5V/0-10V selection"
Gain
Pr.903
Pr.905
100%
Pr.73
5V
10V
20mA

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