Mitsubishi Electric 800 Series Instruction Manual page 157

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
Selecting the torque limit input method (Pr.810)
• Use Pr.810 Torque limit input method selection to select which method to use to limit the output torque during speed
control.
Torque limit input
Pr.810 setting
0 (Initial value) Internal torque limit 1
1 External torque limit
2 Internal torque limit 2
Torque limit level using parameter settings (Pr.810 = "0", Pr.812 to
Pr.814)
• The torque is limited by parameter setting. (Internal torque limit 1)
• In the initial value, a limit is applied to all quadrants with Pr.22 Stall prevention operation level (Torque limit level).
• To set individually for each quadrant, use 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 setting is regarded as torque limit level in
all the quadrants.
Torque limit
+
Reverse
regeneration
Reverse
quad4
rotation
(Pr.814)
quad3
(Pr.813)
Reverse
driving
Rated speed
156
PARAMETERS
method
Perform the torque limit operation using the parameter (Pr.22, Pr.812 to Pr.814) settings.
If changing the torque limit parameters via communication is enabled, the torque limit
input can be performed via communication.
Torque limit using analog voltage (current) to terminal 1 or terminal 4 is valid.
The torque limit by communication option (FR-A8NC/FR-A8NCE) is enabled.
Forward
driving
Forward
quad1
(Pr.22) rotation
Speed
quad2
(Pr.812)
Forward
regeneration
-
Operation