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.
C2 (902)
Terminal 2 frequency setting
*1
bias frequency
T200
C3 (902)
Terminal 2 frequency setting
*1
bias
T201
125 (903)
Terminal 2 frequency setting
T202
gain frequency
*1
T022
C4 (903)
Terminal 2 frequency setting
*1
gain
T203
C5 (904)
Terminal 4 frequency setting
*1
bias frequency
T400
C6 (904)
Terminal 4 frequency setting
*1
bias
T401
126 (905)
Terminal 4 frequency setting
T402
gain frequency
*1
T042
C7 (905)
Terminal 4 frequency setting
*1
gain
T403
241 Analog input display unit
M043 switchover
*1 On the LCD operation panel used as the command source, the parameter number in parentheses appears instead of that starting with the letter C.
*2 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).
(C2 (Pr.902) to C7 (Pr.905) settings need not be changed.)
 Analog input bias/gain calibration (C2 (Pr.902) to C7 (Pr.905))
• 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 (Pr.902). (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 (Pr.904). (It is initially set to the frequency at 4 mA.)
282
12.(T) Multi-Function Input Terminal Parameters
12.4 Frequency setting voltage (current) bias and gain
Initial value
Name
Gr.1 Gr.2
0 Hz
0%
60 Hz 50 Hz 0 to 590 Hz Set the gain (maximum) frequency for the terminal 2 input.
100%
0 Hz
20%
60 Hz 50 Hz 0 to 590 Hz Set the gain (maximum) frequency for the terminal 4 input.
100%
0
Bias setting
C5 (Pr.904) Terminal 4 frequency setting bias
frequency
C6 (Pr.904) Terminal 4 frequency setting bias
C38 (Pr.932) Terminal 4 bias command (torque/
magnetic flux)
C39 (Pr.932) Terminal 4 bias (torque/magnetic
flux)
—
*2
Setting
range
0 to 590 Hz Set the bias frequency for the terminal 2 input.
0% to Set the converted % of the bias voltage (current) for the terminal
300% 2 input.
0% to Set the converted % of the gain voltage (current) for the terminal
300% 2 input.
0 to 590 Hz Set the bias frequency for the terminal 4 input.
0% to Set the converted % of the bias current (voltage) for the terminal
300% 4 input.
0% to Set the converted % of the gain current (voltage) for the terminal
300% 4 input.
0 % display
1 V/mA display
page 50).
Calibration parameter
Pr.126 Terminal 4 frequency setting gain
frequency
C7 (Pr.905) Terminal 4 frequency setting gain
C40 (Pr.933) Terminal 4 gain command (torque/
magnetic flux)
C41 (Pr.933) Terminal 4 gain (torque/magnetic
flux)
—
page 274.)
Description
Select the unit for analog input display.
Gain setting