Biases And Gains Of The Frequency Setting Voltage (Current) And Built-In Frequency Setting Potentiometer (Pr. 902 To Pr. 905, Pr. 922, Pr. 923) - Mitsubishi Electric FR-E520 Instruction Manual

4.2.52 Biases and gains of the frequency setting voltage (current)
and built-in frequency setting potentiometer
(Pr. 902 to Pr. 905, Pr. 922, Pr. 923)
Pr. 902 "frequency setting voltage bias"
Pr. 903 "frequency setting voltage gain"
Pr. 904 "frequency setting current bias"
Pr. 905 "frequency setting current gain"
Pr. 922 "built-in frequency setting potentiometer bias"
Pr. 923 "built-in frequency setting potentiometer gain"
You can set the output frequency as desired in relation to the frequency setting
potentiometer of the operation panel or the external 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), i.e. 0 to 5VDC,0 to
10VDC or 4 to 20mADC, and the output frequency.
! Use Pr. 902 to set the bias of the voltage signal and use Pr. 903 to set its gain
! Use Pr. 904 to set the bias of the current signal and use Pr. 905 to set its gain.
! Use Pr. 922 to set the bias of the operation panel's potentiometer and use Pr. 923 to
set its gain.
Parameter Factory
Number Setting (*)
902 0V
903 5V
904 4mA
905 20mA 60Hz 0 to 20mA 1 to 400Hz
922 0V
923 5V
* Factory settings may differ because of
calibration parameters.
<Setting>
(1) The frequency setting voltage (current) biases and gains may be adjusted by any
of the three following ways:
1) Any point can be adjusted with a voltage applied across terminals 2-5 (with a
current flowing across terminals 4-5).
2) Any point can be adjusted with no voltage applied across terminals 2-5 (with no
current flowing across terminals 4-5).
3) Only the bias and gain frequencies are adjusted and the voltage (current) is not
adjusted.
Setting Range
0Hz 0 to 10V 0 to 60Hz
60Hz 0 to 10V 1 to 400Hz
0Hz 0 to 20mA 0 to 60Hz
0Hz 0 to 5V 1 to 60Hz
60Hz 0 to 5V 1 to 400Hz
Related parameters
Pr. 38 "frequency at 5V (10V) input"
Pr. 39 "frequency at 20mA input"
Pr. 73 "0-5/0-10V selection"
Pr. 79 "operation mode selection"
Pr.146"frequency setting
command selection"
(60Hz)
Bias
Pr.902
Pr.904
0
Pr.922
0
4
Frequency setting signal
172
PARAMETERS
Factory setting
Gain
5V
Pr.73
10V
20mA
Pr.903
Pr.905
Pr.923