Mitsubishi Electric FR-A700 Instruction Manual page 142

Simple mode parameter list
Selection method of torque control
● Torque control is exercised to develop torque as set in the torque command.
● The motor speed becomes constant when the motor output torque and load torque are
balanced. For torque control, therefore, the speed is determined by the load.
● For torque control, the motor gains speed as the motor output torque becomes greater than
the motor load. To prevent overspeed, set the speed limit value so that the motor speed
does not increase too high. (Speed control is exercised during speed limit and torque control
is disabled.)
● When speed limit is not set, the speed limit value setting is regarded as 0Hz to disable torque
control.
according as required. (Pr. 80, Pr. 81) (Refer to page 5-13.)
Perform offline auto tuning as required. (Pr.96) (Refer to section 5.1.9.)
Select online auto tuning as required. (Pr.95) (Refer to section 5.1.10.)
Select manual input speed control gain adjustment as required. (Refer to page 5-35.)
Fig. 5-12: Selection of torque control
5 - 22
Perform secure wiring.
(Refer to section 3.2)
Set the motor and encoder.
(Pr. 71, Pr. 359, Pr. 369)
Set the motor capacity and the number of motor poles
Select a control method. (Refer to page 5-13.)
Set the torque limit. (Pr. 810)
(Refer to section 6.3.3.)
Set the speed limit. (Pr. 807)
(Refer to section 6.4.5.)
Test run
Mount the FR-A7AP.
Set Pr. 71 "Applied motor", Pr. 359 "Encoder rotation direction" and Pr.
369 "Number of encoder pulses" according to the motor and encoder
used. (Refer to page 3-42.)
Set the motor capacity (kW) in Pr. 80 "Motor capacity" and set the
number of motor poles (number of poles) in Pr. 81 "Number of motor
poles". (V/f control is performed when the setting is "9999" (initial value).
Set either "1" (torque control), "2" (speed-torque switchover) or "5"
(position-torque switchover) in Pr. 800 and make torque control valid.
Basic settings