Frequency Setting Voltage (Current) Bias And Gain - Mitsubishi Electric 800 Series Instruction Manual

12.4

Frequency setting voltage (current) bias and gain

The magnitude (slope) of the output frequency can be set as desired in relation to the frequency setting signal (0 to 5 VDC, 0
to 10 VDC, or 4 to 20 mA). Use Pr.73 Analog input selection (Pr.267 Terminal 4 input selection) and the voltage/current
input selection switch to switch among input of 0 to 5 VDC, 0 to 10 V, and 0 to 20 mA. (Refer to
Pr. Name
C2 Terminal 2 frequency setting
T200 bias frequency
C3 Terminal 2 frequency setting
T201 bias
125
Terminal 2 frequency setting
T202
gain frequency
T022
C4 Terminal 2 frequency setting
T203 gain
C5 Terminal 4 frequency setting
T400 bias frequency
C6 Terminal 4 frequency setting
T401 bias
126
Terminal 4 frequency setting
T402
gain frequency
T042
C7 Terminal 4 frequency setting
T403 gain
241 Analog input display unit
M043 switchover
*1 Gr.1 and Gr.2 are the parameter initial value groups. (Refer to
 Relationship between the analog input terminal function and the
calibration parameter
• Calibration parameter according to the terminal 4 function
Pr.858
Terminal function
setting
0 (initial
Frequency command
value)
4 Torque limit
9999 No function
 Changing the frequency for the maximum analog input (Pr.125, Pr.126)
• Use Pr.125 (Pr.126) to change the frequency setting (gain) for the maximum analog input voltage (current).
(The C2 to C7 settings need not be changed.)
 Analog input bias/gain calibration (C2 to C7)
• The "bias" and "gain" functions serve to adjust the relationship between a setting input signal and the output frequency. A
setting input signal is such as a 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mADC signal externally input to set the output
frequency.
• Set the bias frequency of the terminal 2 input using C2. (It is initially set to the frequency at 0 V.)
• 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. (It is initially set to the frequency at 4 mA.)
*1
Initial value
Setting
range
Gr.1 Gr.2
0 Hz 0 to 590 Hz Set the bias frequency for the terminal 2 input.
0% to
0%
300%
60 Hz 50 Hz 0 to 590 Hz Set the gain (maximum) frequency for the terminal 2 input.
0% to
100%
300%
0 Hz 0 to 590 Hz Set the bias frequency for the terminal 4 input.
0% to
20%
300%
60 Hz 50 Hz 0 to 590 Hz Set the gain (maximum) frequency for the terminal 4 input.
0% to
100%
300%
0
0
1
Bias setting
C5 Terminal 4 frequency setting bias frequency
C6 Terminal 4 frequency setting bias
C38 Terminal 4 bias command (torque/
magnetic flux)
C39 Terminal 4 bias (torque/magnetic flux)
—
Description
Set the converted % of the bias voltage (current) for the terminal
2 input.
Set the converted % of the gain voltage (current) for the terminal
2 input.
Set the converted % of the bias current (voltage) for the terminal
4 input.
Set the converted % of the gain current (voltage) for the terminal
4 input.
% display
Select the unit for analog input display.
V/mA display
page 82).
Calibration parameter
Pr.126 Terminal 4 frequency setting gain
frequency
C7 Terminal 4 frequency setting gain
C40 Terminal 4 gain command (torque/
magnetic flux)
C41 Terminal 4 gain (torque/magnetic flux)
—
12. (T) Multi-Function Input Terminal Parameters
12.4 Frequency setting voltage (current) bias and gain
page 266.)
Gain setting
11
12
13
14
15
16
17
18
19
20
273