YASKAWA Varispeed G7 Series Instruction Manual page 369

Torque Reference Adjustment
Consider the following information when adjusting the torque.
Torque Reference Delay Time: d5-02
The time constant of the primary filter in the torque reference section can be adjusted. This constant is used to
eliminate noise in the torque reference signal and adjust the responsiveness to the host controller. Increase the
setting if oscillation occurs during torque control.
Setting the Torque Compensation
Set multi-function analog input A2 or A3 to torque compensation (setting 14). When the amount of torque loss
for mechanical loss or other factor at the load is input to one of these terminals, it is added to the torque refer-
ence to compensate for the loss. The direction of torque will be as follows:
Positive voltage (current): Torque compensation reference for forward motor rotation (counterclockwise as
•
viewed from the motor output axis).
Negative voltage: Torque compensation reference for reverse motor rotation (clockwise as viewed from
•
the motor output axis).
Since the polarity of the voltage input determines the direction, only forward torque compensation can be
input when the 0 to 10 V or 4 to 20 mA signal level has been selected. If you want to input reverse torque com-
pensation, be sure to select the -10 to 10 V signal level.
Speed/Torque Control Switching Function
It is possible to switch between speed control and torque control when one of the multi-function inputs (H1-01
to H1-10) is set to 71 (Speed/Torque Control Change). Speed control is performed when the input is OFF and
torque control is performed when the input is ON. Set d5-01 to switch speed/torque control.
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