Mitsubishi Electric 800 Series, Instruction Manual, Page: 176 / 727

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
PARAMETERS
175
5
5.3.8
Torque bias
 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 Pr.919 and
Pr.920 . (When the squirrel cage rises during forward motor
rotation.)
2
Set the torque bias amount using terminal 1 in any of Pr.919 and
Pr.920 . (When the squirrel cage rises during reverse motor
rotation.)
3
The torque bias amount using terminal 1 can be set automatically
in
Pr.919, Pr.920 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. (Fixed to 0 V/0%.)
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 (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 (Pr.920) .
Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Vector Vector Vector
Speed command
Torque bias selection 1
Torque bias selection 2
[ Pr. 846 ]
[ Pr. 919 ]
[ 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
+
+