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Torque biases (Pr. 840 to Pr. 848)
(1) Parameter details
1) Pr. 840 "torque bias selection"
Select the setting method of the torque bias amount.
<Operation diagrams>
• When Pr. 840 = 0
Set the torque bias values (Pr. 841 to Pr. 843) in the following table according to the combination of the contact
signals (DI1 to DI4).
(Example) 25% when Pr. 841 = 1025, -25% when Pr. 842 = 975, -75% when Pr. 843 = 925
• When Pr. 840 = 1
Calculate the torque bias from the analog input value of the terminal 3 as shown below and set the gain and bias
(Pr. 904, Pr. 905) of the torque command.
• When Pr. 840 = 2
Pr. 840 Setting Description
0 Set the torque bias amount based on the contact signals (DI1 to DI4) in Pr. 841 to Pr. 843.
1
To raise the cage when the motor runs in forward rotation direction.
Set the terminal 3-based torque bias amount as desired in Pr. 904 and Pr. 905.
2
To raise the cage when the motor runs in reverse rotation direction.
Set the terminal 3-based torque bias amount as desired in Pr. 904 and Pr. 905.
3
The terminal 3-based torque bias amount can be set automatically in Pr. 904, Pr. 905 and Pr. 846
according to the load.
9999 No torque bias
Torque Bias Selection 1
(X42 Terminal)
Torque Bias Selection 2
(X43 Terminal)
Torque Bias (Pr. 841 to Pr. 843)
OFF OFF No selection
ON OFF
Pr.841 1000 to 1400%: Positive value
600 to 999%: Negative value
OFF ON
Pr.842 1000 to 1400%: Positive value
600 to 999%: Negative value
ON ON
Pr.843 1000 to 1400%: Positive value
600 to 999%: Negative value
Rise (Motor Forward Rotation) Fall (Motor Reverse Rotation)
Rise (Motor Reverse Rotation) Fall (Motor Forward Rotation)
Torque
command
terminal 3 gain,
Pr. 905
Torque
command
terminal 3 bias,
Pr. 904
Voltage for
max. load
Voltage for
balanced load
Pr.846
Terminal 3
input
Bias amount (Pr. 841, Pr. 842, Pr. 843)
Fall-time
torque bias
terminal 3 gain,
Pr. 848
Fall-time
torque bias
terminal 3 bias,
Pr. 847
Voltage for
max. load
Voltage for
balanced load
Pr.846
Terminal 3
input
Bias amount (Pr. 841, Pr. 842, Pr. 843)
Torque
command
terminal 3 gain,
Pr. 905
Torque
command
terminal 3 bias,
Pr. 904
Voltage for
max. load
Voltage for
balanced load
Pr.846
Terminal 3
input
Bias amount (Pr. 841, Pr. 842, Pr. 843)
Fall-time
torque bias
terminal 3 bias,
Pr. 848
Fall-time
torque bias
terminal 3 gain,
Pr. 847
Voltage for
max. load
Voltage for
balanced load
Pr.846
Terminal 3
input
Bias amount (Pr. 841, Pr. 842, Pr. 843)