“A” Group: Standard Functions
Configuring
Drive Parameters
3–14
NOTE: When the inverter is in SLV (sensorless vector) mode, use B83 to set the carrier
frequency greater than 2.1 kHz for proper operation. When the data of the H Group
parameters does not match that of the motor, satisfactory characteristics may not be
obtained during sensorless vector operation. Also, the stabilization adjustment (H06) is
effective for V/F settings (00 and 01). The full performance may not be achieved if the
rating of a motor used is more than one frame size smaller than the maximum applicable
rating when the sensorless vector function is used. You must disable sensorless vector
operation when two or more motors are connected. For the motor stabilization, set this
data properly for the H03 (H203) parameter according to the motor used if its rating is
not the same as the maximum applicable rating in V/F operation.
The following table shows the methods of torque control selection.
“A” Function
Run-
time
Edit
Defaults DOP,DRW,DOP+
Func.
Code
Name Description
EU/
US
Units
Func.
Code
Name
A41 Torque boost method
selection
Two options:
00...Manual torque boost
01...Automatic torque boost
✘
00 — F-50 V-BOOST
MODE
A241 Torque boost method
selection, 2nd motor
Two options (for 2nd motor):
00...Manual torque boost
01...Automatic torque boost
✘
00 — F-50 2V-
BOOST
MODE
A42 Manual torque boost
value
Can boost starting torque
between 0 and 99% above
normal V/F curve, from 0 to
1/2 base frequency
✔
11 — F-50 V-BOOST
CODE
A242 Manual torque boost
value, 2nd motor
Can boost starting torque
between 0 and 99% above
normal V/F curve, from 0 to
1/2 base frequency
✔
11 — F-50 2V-
BOOST
CODE
A43 Manual torque boost
frequency adjustment
Sets the frequency of the V/F
breakpoint A in graph (top of
previous page) for torque boost
✔
10 % F-50 V-BOOST
F
A243 Manual torque boost
frequency adjustment,
2nd motor
Sets the frequency of the V/F
breakpoint A in graph (top of
previous page) for torque boost
✔
10 % F-50 2V-
BOOST F
A44 V/F characteristic
curve selection
Two available V/F curves;
three select codes:
00...Constant torque
01...Reduced torque
02...Sensorless vector control
✘
0 — F-04 Control
A244 V/F characteristic
curve selection, 2nd
motor
Two available V/F curves;
three select codes:
00...Constant torque
01...Reduced torque
02...Sensorless vector control
✘
0 — F-04 2Control
A45 V/F gain setting Sets voltage gain of the inverter
from 20 to 100%
✔
100 % Mon. V-GAIN
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