Mitsubishi Electric 800 Series Instruction Manual (Function page 360

• Use Pr.125 to set the output frequency to the frequency command voltage (current) set by Pr.73 Analog input selection.
• Set the bias frequency of the terminal 4 input using C5 (Pr.904). (It is initially set to the frequency at 4 mA.)
• Use Pr.126 to set the output frequency to the 20 mA input of the frequency command current (4 to 20 mA).
Initial value
60Hz
(50Hz)
Bias
C2(Pr.902)
0
0
Frequency setting signal
0
0
C3(Pr.902)
• 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
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frequency.
Adjustment by selecting the voltage (current) at the bias/gain frequency without applying voltage (current) between
terminals 2 and 5 (4 and 5).
Adjustment by changing the frequency without adjusting the voltage (current).
NOTE
• 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 terminal 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
Gain
Pr.125
100%
5V
10V
20mA
C4(Pr.903)
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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)
Bias
C5(Pr.904)
0 20
0 4
Frequency setting signal
0 1
0 2
C6(Pr.904)
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14. (T) Multi-Function Input Terminal Parameters
14.4 Frequency setting voltage (current) bias and gain
Initial value
Gain Pr.126
100%
20mA
5V
10V
C7(Pr.905)
Pr.241 = "1"
0 to 5 V (0.01 V)
0 to 10 V (0.01 V)
0 to 20 mA (0.01 mA)
11
12
13
14
15
16
17
18
19
20
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