Torque Biases (Pr. 840 To Pr. 848) - Mitsubishi Electric FR-A700 Instruction Manual

Speed control by real sensorless vector control, vector control
6.3.5

Torque biases (Pr. 840 to Pr. 848)

This function accelerates the rise of the torque at a start. Adjust the torque at a motor start using
the contact signals or analog signals.
Pr.
Name
No.
840
Torque bias selection
841
Torque bias 1
842
Torque bias 2
843
Torque bias 3
844
Torque bias filter
Torque bias operation
845
time
Torque bias balance
846
compensation
Fall-time torque bias
847
terminal 1 bias
Fall-time torque bias
848
terminal 1 gain
The above parameters can be set when the FR-A7AP (option) is mounted.
6 - 102
Initial
Setting Range Description
Value
Set the torque bias amount with the
0 contact signal (X42, X43) using
Pr. 841 to Pr. 843.
Set the terminal 1-based torque bias
amount as desired in C16 to C19.
1
(in the case a cage goes up when a
motor runs reversely)
Set the terminal 1-based torque bias
9999 amount as desired in C16 to C19.
2
(in the case a cage goes up when a
motor runs forward)
The terminal 1-based torque bias
amount can be set automatically in
3
C16 to C19, Pr. 846 according to the
load.
Without torque bias, rated torque
9999
100%
Negative torque bias amount
600–999%
(−400% to −1%)
Positive torque bias amount
9999
1000–1400%
(0 % to 400 %)
9999 Without torque bias setting
0–5s Time until torque rises.
9999
9999 Same operation as when 0s is set.
Time for maintaining torque equiva-
0–5s
lent to the torque bias amount.
9999
9999 Same operation as when 0s is set.
0–10V Set the voltage under balanced load.
9999
9999 Same operation as when 0V is set.
Set the bias value of the torque
0–400%
command.
9999
Same as at a rise time (C16, C17
9999
(Pr. 919)).
Set the gain value of the torque
0–400%
command.
9999
Same as at a rise time (C18, C19
9999
(Pr. 920)).
Vector Vector Vector
Parameters referred to
73
178–189
C16–C19
Parameter
Refer to
Section
Analog input selec- 6.20.2
tion
Input terminal 6.14.1
function selection)
Torque setting 6.20.6
voltage (current)
bias and gain