Speed Limit (Pr. 807 To Pr. 809) - Mitsubishi Electric FR-A760 Series Instruction Manual

4.5.5

Speed limit (Pr. 807 to Pr. 809)

Set the speed limit value to prevent overspeed of the motor in case the load torque becomes less than the torque
command value, etc. during torque control operation.
Parameter
Name
Number
807 Speed limit selection
Forward rotation speed
808
limit
Reverse rotation speed
809
limit
(1) Control block diagram
Same method
as speed command input
Parameter(Pr. 808, Pr. 809)
Forward/reverse rotation speed limit
Sensorless Sensorless Sensorless
Initial Value
0
60Hz
9999
Speed estimated value < speed limit value
Torque command
Pr. 807 Speed limit selection
0
1
+
2
Speed estimated value
-
Real sensorless vector control
Torque control by real sensorless vector
Vector Vector Vector
Setting
Range
Use the speed command value during speed
0
control as speed limit.
According to Pr. 808 and Pr. 809 , set the speed limit
1 in forward and reverse rotation directions
individually.
Forward/reverse rotation speed limit
The analog voltage of the terminal 1 input is used to
2 make speed limit.
The speed limit of the forward rotation and reverse
rotation is switched according to the polarity.
0 to120Hz Set the speed limit for the forward rotation direction.
0 to120Hz Set the speed limit of the reverse rotation side.
9999 As set in Pr. 808 .
+
-
Speed control
(proportional control)
speed limit value
Speed estimator
Vector control
control, vector control
Description
Motor
Torque control
Encoder
113
4