Mitsubishi Electric FR-A700 Instruction Manual page 284

Speed control by real sensorless vector control, vector control
Setting torque bias amount with terminal 1 (Pr. 840 = 1 or 2)
● Calculate torque bias from the load input from terminal 1 as shown in the diagram below
and provide torque bias.
● When torque bias amount is set from terminal 1, set "6" in Pr. 868 "Terminal 1 function
assignment".
Pr. 840
1
2
Tab. 6-19: Setting torque bias amount with terminal 1
Example Pr. 841 = 1025 for 25%
Pr. 842 = 975 for −25%
Pr. 843 = 925 for −75%
6 - 104
Rise (Motor Forward Rotation)
Bias amount
Torque command
terminal 1 gain
C18, C19 (Pr. 920)
Torque command
terminal 1 bias
C16, C17 (Pr. 919)
Voltage for
balanced load
Pr. 846
Bias amount
Voltage for
Torque command
balanced load
terminal 1 bias
Pr. 846
C16, C17 (Pr. 919)
Torque command
terminal 1 gain
C18, C19 (Pr. 920)
terminal 1 bias
Terminal 1
input
Voltage for
max. load
terminal 1 gain
I001513E
terminal 1 bias
Voltage for
max. load
Terminal 1
input
terminal 1 gain
I001515E
Fall (Motor Reverse Rotation)
Bias amount
Fall-time
torque bias
Pr. 848
Terminal 1
input
Voltage for
Fall-time
max. load
torque bias
Pr. 847
Voltage for
balanced load
Pr. 846
Bias amount
Voltage for
Fall-time
balanced load
torque bias
Pr. 846
Voltage for
Pr. 847
max. load
Terminal 1
input
Fall-time
torque bias
Pr. 848
Parameter
I001514E
I001516E