Mitsubishi Electric FR-A800 Series Instruction Manual page 514

• Use C18 (Pr.920) to set the torque to the torque command voltage set by Pr.73 Analog input selection. (The initial value
is 10 V.)
• Set the bias torque of the terminal 4 input using C38 (Pr.932). (The initial value is the torque for 4 mA.)
• Use C40 (Pr.933) to set the torque to the 20 mA input of the torque command current (4 to 20 mA).
(-5V)
(-10V)
C16(Pr.919)
-100%
∗1
Calibration example of terminal 1
*1 A negative voltage (0 to -10 V (-5 V)) is valid as a torque command. However, when a negative voltage is input as a torque limit value, the torque
limit is regarded as "0".
• There are three methods to adjust the bias/gain torque setting voltage (current).
Adjustment by applying voltage (current) between terminals 1 and 5 (4 and 5) to set the voltage (current) at the bias/gain
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level.
Adjustment by selecting the voltage (current) at the bias/gain level without applying voltage (current) between terminals 1
and 5 (4 and 5).
Adjustment by changing the torque 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), the unit of the displayed value of C17 (Pr.919), C19
(Pr.920), C39 (Pr.932), and C41 (Pr.933) changes as shown below:
Analog command (via terminal 1 or 4)
(depending on the settings of Pr.73
(Pr.267))
0 to 5 V input
0 to 10 V input
0 to 20 mA input
 Torque setting voltage (current) bias/gain adjustment method
 Adjustment by applying voltage (current) between terminals 1 and 5 (4 and 5) to set the voltage
(current) 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
3.
Selecting the parameter setting mode
Press
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400
150
Bias
Initial value
0
0
Torque setting signal
0
C17(Pr.919)
-150
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0 to 100% (0.1%)
0 to 100% (0.1%)
0 to 100% (0.1%)
to choose the PU operation mode. [PU] indicator turns ON.
to choose the parameter setting mode. (The parameter number read previously appears)
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400
Gain
150
C18(Pr.920)
100%
Bias
5V
C38
10V
(Pr.932)
C19(Pr.920)
Pr.241 = "0" (initial value)
Initial value
0 20
0 4
Torque setting signal
C39(Pr.932)
Calibration example of terminal 4
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Pr.241 = "1"
0 to 5 V (0.01 V)
0 to 10 V (0.01 V)
0 to 20 mA (0.01 mA)
5.12 (T) Multi-function input terminal parameters
1
2
3
Gain
C40
(Pr.933)
4
100%
20mA
5
C41(Pr.933)
6
7
8
9
10
513
5. PARAMETERS