Mitsubishi FR-A800

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
202
PARAMETERS
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Parameters referred to
Pr.820 Speed control P gain 1, Pr.830 Speed control P gain 2 page 192
Pr.821 Speed control integral time 1, Pr.831 Speed control integral time 2 page 192
Pr.788 Low speed range torque characteristic selection page 176
5.3.8 Torque bias
The parameters above can be set when FR-A8AP (option) is installed.
Block diagram
The torque bias function can be used to make the starting torque start-up faster. At this time, the motor starting torque
can be adjusted with a contact signal or analog signal.
Pr. Name
Initial
value
Setting
range
Description
840
G230
Torque bias selection
9999
0
Set the torque bias amount using contact signals (X42, X43) in
Pr.841 to Pr.843.
1
Set the torque bias amount using terminal 1 in any of C16 to C19.
(When the squirrel cage rises during forward motor rotation.)
2
Set the torque bias amount using terminal 1 in any of C16 to C19.
(When the squirrel cage rises during reverse motor rotation.)
3
The torque bias amount using terminal 1 can be set automatically
in C16 to C19 and Pr.846 according to the load.
24
Torque bias command via PROFIBUS-DP communication (FR-
A8NP) (-400% to 400%)
25
Torque bias command via PROFIBUS-DP communication (FR-
A8NP) (-327.68% to 327.67%)
9999 No torque bias, rated torque 100%
841
G231
Torque bias 1
9999
600 to
999%
Negative torque bias amount (-400% to -1%)
842
G232
Torque bias 2
1000 to
1400%
Positive torque bias amount (0 to 400%)
843
G233
Torque bias 3
9999 No torque bias setting
844
G234
Torque bias filter
9999
0 to 5 s The time until the torque starts up.
9999 The same operation as 0 s.
845
G235
Torque bias operation
time
9999
0 to 5 s The time for retaining the torque of the torque bias amount.
9999 The same operation as 0 s.
846
G236
Torque bias balance
compensation
9999
0 to 10 V Set the voltage for the balanced load.
9999 The same operation as 0 V.
847
G237
Fall-time torque bias
terminal 1 bias
9999
0 to 400% The bias value setting in the torque command.
9999 The same as during rising (C16, C17 (Pr.919)).
848
G238
Fall-time torque bias
terminal 1 gain
9999
0 to 400% The gain value setting in the torque command.
9999 The same as during rising (C18, C19 (Pr.920)).
Vector
Vector
Vector
Speed command
Torque bias selection 1
Torque bias selection 2
[Pr. 846]
C16, C17
[Pr. 919]
C18, C19
[Pr. 920]
Internal parameters
[Pr. 841]
[Pr. 842]
[Pr. 843]
Speed command
CW Cage
CW > Cage
[Pr. 840 = 1, 2, 3][Pr. 840 = 0]
Speed
control
P gain
Torque
control
IM
PLG
CW
Cage
Load
detector
Terminal 1
-
+
-
+
X42
X43
SD
[Pr. 826]
Torque setting filter 1
+
[Pr. 845]
Speed
control
integral time
+
0
Integration cleared to 0
+
+