Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 485

• Use Pr.126 to set the output frequency to the 20 mA input of the frequency command current (4 to 20 mA).
60Hz
(50Hz)
Bias
C2
C12(Pr.917)
0
0
Frequency setting signal
0
0
C3(Pr.902)
C13(Pr.917)
• There are three methods to adjust the bias/gain frequency setting voltage (current).
Adjustment by applying voltage (current) between terminals 2 and 5 (4 and 5) to set the voltage (current) at the bias/gain
page 484
torque.
Adjustment by selecting the voltage (current) at the bias/gain torque without applying voltage (current) between terminals
2 and 5 (4 and 5).
Adjustment by changing the frequency without adjusting the voltage (current).
NOTE
• When the slope of the frequency is changed after calibration of terminal 2, the slope of the frequency is also changed for
terminal 1.
• When voltage is applied to terminal 1 while calibration of terminal 2 or terminal 4 is in progress, the terminal 1 input value is
added to the terminal 2 (4) input value.
• Always calibrate the input after changing the voltage/current input signal with Pr.73 (Pr.267) and the voltage/current input
selection switch.
 Display unit changing for analog input (Pr.241)
• The analog input display unit (%/V/mA) can be changed for analog input bias/gain calibration.
• Depending on the terminal input specification setting of Pr.73 (Pr.267) and the voltage/current input switch, the unit of the
displayed value of C3 (Pr.902), C4 (Pr.903), C6 (Pr.904) and C7 (Pr.905) changes as shown below:
Analog command (via terminals 2 or 4)
(depending on the settings of Pr.73
(Pr.267) and the voltage/current input
selection switch)
0 to 5 V input
0 to 10 V input
0 to 20 mA input
NOTE
• When voltage is applied to terminal 1 while the terminal 1 input specification (0 to ±5 V, 0 to ±10 V) does not agree with the
main speed (terminal 2 or terminal 4 input) specification (0 to 5 V, 0 to 10 V, 0 to 20 mA), the analog input is not correctly
displayed. (For example, when 0 V is applied to terminal 2 and 10 V is applied to terminal 1 in the initial status, the value is
indicated as 5 V (100%).)
Set "0 (initial value)" in Pr.241 to use the % display.
 Frequency setting voltage (current) bias/gain adjustment method
 Adjustment by applying voltage (current) between terminals 2 and 5 (4 and 5) to set the voltage
(current) at the bias/gain frequency (Example of adjustment at the gain frequency)
Operating procedure
1.
Turning ON the power of the inverter
The operation panel is in the monitor mode.
484
5. PARAMETERS
5.12 (T) Multi-function input terminal parameters
Initial value
100%
5V
10V
20mA
C4(Pr.903)
C15(Pr.918)
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Pr.241 = 0 (initial value)
0 to 100% (0.1%)
0 to 100% (0.1%)
0 to 100% (0.1%)
60Hz
(50Hz)
Output frequency
(Hz)
Gain
Pr.125
Bias
C14(Pr.918)
C5
(Pr.904)
C6(Pr.904)
Initial value
0 20
0 4
Frequency setting signal
0 1
0 2
page 486
Pr.241 = 1
0 to 5 V (0.01 V)
0 to 10 V (0.01 V)
0 to 20 mA (0.01 mA)
Gain
Pr.126
100%
20mA
5V
10V
C7(Pr.905)