Mitsubishi Electric 800 Series Instruction Manual page 280

• Use C40 to set the torque to the 20 mA input of the torque command current (4 to 20 mA).
400
150
Bias
C38
0 20
0 4
Torque setting signal
C39
Calibration example of terminal 4
• There are three methods to adjust the bias/gain for torque setting current (voltage).
Adjustment by applying current (voltage) between terminals 4 and 5 to set the current (voltage) at the bias/gain torque.
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Adjustment by selecting the current (voltage) at the bias/gain torque without applying current (voltage) between terminals
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4 and 5.
Adjustment by changing the torque without adjusting the current (voltage).
NOTE
• Always calibrate the input after changing the voltage/current input signal with 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), the units of the displayed values of C39 and C41
change as shown below:
Analog command (via terminal 4)
(depending on the Pr.267 setting)
0 to 5 V input
0 to 10 V input
0 to 20 mA input
 Torque setting current (voltage) bias/gain adjustment method
 Adjustment by applying current (voltage) between terminals 4 and 5 to set the current (voltage)
at the bias/gain torque
Operating procedure
1.
Turning ON the power of the inverter
The operation panel is in the monitor mode.
2.
Changing the operation mode
Press the PU/EXT key to choose the PU operation mode. The PU LED turns ON.
3.
Selecting the parameter setting mode
Press the MODE key to choose the parameter setting mode. (The parameter number read previously appears.)
4.
Calibration parameter selection
Turn the setting dial or press the UP/DOWN key until "C..." appears. Press the SET key to display "C---".
5.
Selecting a parameter
Turn the setting dial or press the UP/DOWN key until "C41" (C41 Terminal 4 gain (torque/magnetic flux)) appears.
Gain
C40
Initial value
100%
20mA
C41
Pr.241 = "0" (initial value)
0% to 100% (0.1%)
0% to 100% (0.1%)
0% to 100% (0.1%)
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0 to 5 V (0.01 V)
0 to 10 V (0.01 V)
0 to 20 mA (0.01 mA)
12. (T) Multi-Function Input Terminal Parameters
12.5 Torque (magnetic flux) setting current (voltage) bias and gain
Pr.241 = "1"
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