7 Advanced Settings
7-3-7
Switching Function of Torque Control/Speed Control (ATR)
This function is used so that speed control and torque control are switched with contact positioning con-
trol, etc.
When turning on the input terminal function 067 [ATR] terminal, the motor is controlled by torque, and
when turning off, the motor is controlled by speed.
Precautions for Correct Use
If the torque command changes in a step manner when switching from speed control to torque
control, the current may rise instantaneously.
Parameter
Item
Switching time of
Speed control to
Torque control
Input Terminal Function
Item
Input terminal 1 to 9, A
or B selection
7-3-8
Torque Command
In the case of using [AA121] control method in sensorless vector control, and sensor vector control, this
drives the motor based on torque command.
This function can be used not only in speed control/pulse train position control but also in torque con-
trol. It can also be applied to a winding machine.
Using the torque bias function at the time of torque control adds a torque bias amount to torque com-
mand.
In the case of operating by torque control, assign 067 [ATR] to any of the input terminals. Turning ON
the [ATR] terminal switches from speed control to torque control.
Torque command handles the input value selected in the torque command setting [Ad-01] as a com-
mand.
To calculate the motor rated torque (100%) in this function, use the following formula.
Motor rated torque = 79.58 × Motor capacity × Number of poles/Base frequency
Example: Motor rated torque = 79.58 × 5.5 (kW) × 4 (P)/50 (Hz) ≈ 35 Nm
7 - 56
Parameter
Data
[Ad-04]
0 to 1000(ms)
Parameter
[CA-01] to
[CA-11]
High-function General-purpose Inverter RX2 Series User's Manual
Description
This function is used to switch the speed control
to the torque control moderately in accordance
with the set time.
Data
067
[ATR]: Torque command input approval
Default
data
100
Description