Mitsubishi Electric FR-A700 Instruction Manual page 262

Speed control by real sensorless vector control, vector control
Torque limit block diagram
Speed command
Fig. 6-7: Torque limit block diagram
Selection of torque limit input method (Pr. 810)
Set Pr. 810 "Torque limit input method selection" to select the method to limit output torque dur-
ing speed control. Torque limit by parameter setting is initially set.
Pr.
810
Tab. 6-10: Torque limit input
Torque limit level by parameter setting (Pr. 810 = 0, Pr. 812 to Pr. 814)
● In the initial setting, limit is made on all quadrants on the Pr. 22 "Stall prevention operation
level (torque limit level)" .
● When you want to set the level on a quadrant basis, set the torque limit level in Pr. 812
Torque limit level (regeneration), Pr. 813 "Torque limit level (3rd quadrant)", Pr. 814 "Torque
limit level (4th quadrant)". When "9999" is set, Pr. 22 is the torque limit level.
Fig. 6-8: Torque limit level by parameter setting
6 - 82
<Vector control>
Setting Range
0 (initial value)
1
Reverse
regeneration
Reverse
rotation
Torque limit
Speed control
Torque Limit Input
Method
Internal torque limit
External torque limit
Torque limit
quad4 quad1
(Pr. 814) (Pr. 22)
quad3 quad2
(Pr. 813) (Pr. 812)
Reverse
driving
Rated speed
Iq current control
Description
Parameter-set torque limit operation is per-
formed. Changing the torque limit parameter
value by communication enables torque limit to
be input by communication.
Torque limit using the analog voltage (current)
from terminal 1 or terminal 4 is made valid.
Forward
driving
Forward
rotation
Speed
Forward
regeneration
Parameter
M
3~
Encoder
I001501E
I001502E