Mitsubishi Electric 800 Series Instruction Manual page 161

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
Second torque limit level (TL signal, Pr.815)
• For Pr.815 Torque limit level 2, when the Torque limit selection (TL) signal is ON, the setting value of Pr.815 is the limit
value regardless of the setting of Pr.810 Torque limit input method selection.
• To assign the TL signal, set "27" in any of Pr.178 to Pr.189 (Input terminal function selection).
NOTE
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Setting the torque limit values during acceleration/deceleration
individually (Pr.816, Pr.817)
• The torque limit during acceleration and deceleration can be set individually.
Torque limit using the setting values of Pr.816 Torque limit level during acceleration and Pr.817 Torque limit level
during deceleration is shown below.
• If 1 s elapses while the difference between the set speed and rotation speed is within ±2 Hz, the torque limit level during
acceleration/deceleration (Pr.816 or Pr.817) changes to the torque control level during constant speed (Pr.22).
• When the difference between the set speed and rotation speed is -2 Hz or less, the torque limit level during
deceleration (Pr.817) activates.
Output
frequency
(Hz)
Set
frequency
Torque limit
level
Pr.816
Pr.817
NOTE
• The Pr.816 and Pr.817 settings are invalid under position control.
160
PARAMETERS
Torque limit
Reverse
regeneration
Pr.815
quad4
-
Pr.815
quad3
Reverse
driving
Reverse
rotation
Rated speed
-2 Hz < set speed - rotation speed < 2 Hz
Acceleration
1s
Torque limit level
during acceleration
Forward
driving
Pr.815
quad1
+
Speed
Pr.815
quad2
Forward
regeneration
Forward
rotation
-2 Hz
Constant speed
Torque limit set to Pr.810
Torque limit level
during deceleration
set speed - rotation speed
Time
Deceleration