7 Advanced Settings
7 - 54
High-function General-purpose Inverter RX2 Series User’s Manual
This function is used when torque command values are increased during the operation start and the lift-
ing.
The torque bias function operates by enabling torque bias mode selection at the time of speed control.
The torque bias function will be enabled when the [AA121] control method is set to the sensorless vec-
tor control, sensorless vector control in the zero speed area, and sensor vector control.
The torque bias function operates in either speed control or torque control.
When the 068 [TBS] torque bias enable function is set to the input terminal, the torque bias function will
be enabled, only when [TBS] is turned ON. When it is OFF, the torque bias setting will be disabled and
the torque addition will be 0.
In the torque bias function, switching forward/reverse can switch the adding direction.
(a) When it is per the sign [±] of [Ad-14] = 00
Regardless of the operation direction, torque will be added to the forward direction, when the torque
bias value is (+), and to the reverse direction, when the torque bias is (-).
(b) When it is dependent on the operation direction [Ad-14] = 01
The sign of torque bias value and the direction of action of torque bias change based on the direc-
tion of operation command.
Forward command: Adds torque in the same direction as the torque bias value.
Reverse command: Adds torque in the reverse direction as the torque bias value.
Precautions for Correct Use
• The torque bias function increases the current because torque command is added.
• In the case of setting torque bias, values corresponding to analog inputs are as follows.
• Input to Ai1/Ai2 Terminal
• Input to Ai3 Terminal
• The setting of the ratio above can be changed by adjusting the analog input start end func-
tion.
See 8-10-5 Analog Input on page 8-163.
(e.g.) In the case of setting 0.0 to 50.0% to the torque command addition value for 0-10
(V)/0-20 (mA) input as [Ai1], set 10.0% for [Cb-04] to make it 50.0% against maximum
500.0%. ([Cb-03]=0.0,[Cb-04]=10.0,[Cb-05]=0.0,[Cb-06]=100.0)
7-3-6 Torque Bias Function
0 to 10 (V)/0 to 20 (mA) corresponding value
Torque command addition 0.0 to 500.0(%)
-10 to 10 (V) corresponding value
Torque command addition -500.0 to 500.0(%)
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