Mitsubishi Electronics FR-A700 Manual De Usuario
114
4.4.6
Torque biases (Pr. 840 to Pr. 848)
(1) Block diagram
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 .
signals or analog signals .
Parameter
Number
Name
Initial Value
Setting Range
Description
840
Torque bias selection
9999
0
Set the torque bias amount with the contact signal
(X42, X43) using Pr. 841 to Pr. 843.
(X42, X43) using Pr. 841 to Pr. 843.
1
Set the terminal 1-based torque bias amount as
desired in C16 to C19 . (in the case a cage goes up
when a motor runs reversely)
desired in C16 to C19 . (in the case a cage goes up
when a motor runs reversely)
2
Set the terminal 1-based torque bias amount as
desired in C16 to C19 . (in the case a cage goes up
when a motor runs forward)
desired in C16 to C19 . (in the case a cage goes up
when a motor runs forward)
3
The terminal 1-based torque bias amount can be
set automatically in C16 to C19, Pr. 846 according
to the load.
set automatically in C16 to C19, Pr. 846 according
to the load.
9999
Without torque bias, rated torque 100%
841
Torque bias 1
9999
600 to 999%
Negative torque bias amount (-400% to -1%)
842
Torque bias 2
1000 to 1400%
Positive torque bias amount (0% to 400%)
843
Torque bias 3
9999
Without torque bias setting
844
Torque bias filter
9999
0 to 5s
Time until torque rises.
9999
Same operation as when 0s is set.
845
Torque bias operation
time
time
9999
0 to 5s
Time for maintaining torque equivalent to the
torque bias amount.
torque bias amount.
9999
Same operation as when 0s is set.
846
Torque bias balance
compensation
compensation
9999
0 to 10V
Set the voltage under balanced load.
9999
Same operation as when 0V is set.
847
Fall-time torque bias
terminal 1 bias
terminal 1 bias
9999
0 to 400%
Set the bias value of the torque command.
9999
Same as at a rise time (C16, C17 (Pr. 919)).
848
Fall-time torque bias
terminal 1 gain
terminal 1 gain
9999
0 to 400%
Set the gain value of the torque command.
9999
Same as at a rise time (C18, C19 (Pr. 920)).
The above parameters can be set when the FR-A7AP/FR-A7AL (option) is mounted.
Vector
Vector
Vector
Internal parameters
[
Pr. 840 = 0
]
IM
CW
-
-
+
X42
X43
+
+
+
0
Integration cleared to 0
+
+
Speed command
Torque bias selection 1
Torque bias selection 2
Speed command
[Pr. 841]
[Pr. 842]
[Pr. 843]
[Pr. 842]
[Pr. 843]
Speed
control
P gain
Speed
control
integral time
Torque
control
[Pr. 840
=
1, 2, 3]
C16, C17
[Pr. 919]
C18, C19
[Pr. 920]
[Pr. 846]
[Pr. 845]
[Pr. 826]
Torque setting filter 1
Torque setting filter 1
Terminal 1
Encoder
Cage
Load
detector
CW Cage
CW > Cage