Mitsubishi Electric FR-A700 Instruction Manual page 286

Speed control by real sensorless vector control, vector control
Torque bias operation
● When a value other than 9999 is set in Pr. 844 "Torque bias filter", you can slow the rise of
torque. At this time, the torque rises according to the time constant of the primary delay filter.
● Set the time for output torque be maintained with the torque bias command value alone in
Pr. 845 "Torque bias operation time".
Fig. 6-21: Torque output
When pre-excitation is not made, the torque bias functions simultaneously with the start
signal.
NOTES When torque bias is made valid and "6" is set in Pr. 868, terminal 1 serves as torque com-
mand not as frequency setting auxiliary. When override compensation is set by Pr. 73 and
terminal 1 acts as main speed, no main speed (main speed = 0Hz) is slected.
Changing the terminal assignment using Pr. 178 to Pr. 189 "Input terminal function
selection" may affect the other functions. Make setting after confirming the function of each
terminal.
6 - 106
Speed
Torque bias
Torque bias filter primary
delay time constant
Output torque
Time when torque is generated by
torque bias setting
Pre-excitation LX /
Servo lock
Start signal
Pr. 844
Pr. 845
Parameter
I001517E