Mitsubishi Electric FR-A800, Instruction Manual

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Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
FR-A800 5 - 113
5.3.8 Torque bias
The torque bias function can be used to make the starting torque start-up faster. At this time, the mo-
tor starting torque can be adjusted with a contact signal or analog signal.
Block diagram
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. (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 (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)).
I002522E
Fig. 5-31: Block diagram
Sensorless Sensorless Sensorless Vector Vector Vector
CW
-
+
-
+
X42
X43
SD
+
+
0
+
+
Speed command
Torque bias selection 1
Torque bias selection 2
Speed command
Speed
control
P gain
Speed
control
integral time
Internal parameters
[Pr. 840 = 0]
[Pr. 845]
Integration cleared to 0
C16, C17
[Pr. 919]
C18, C19
[Pr. 920]
[Pr. 846]
[Pr. 841]
[Pr. 842]
[Pr. 843]
[Pr. 840 = 1, 2, 3]
[Pr. 826]
Torque setting filter 1
Cage
Cage
Torque
control
Cage
Load
detector
Terminal 1
M
3~
PLG