44
Before operation
3.3.4 Increasing the starting torque (Pr. 0)
Set this parameter when "the motor with a load will not rotate", "an alarm [OL] is output, resulting in an inverter trip due to [OC1]," etc.
Parameter
Number
Name Initial Value Setting Range Description
0 Torque boost
0.75K or less 6%
0 to 30%
Motor torque in the low-frequency range can be adjusted
to the load to increase the starting motor torque.
1.5K to 3.7K 4%
5.5K, 7.5K 3%
11K, 15K 2%
Changing
example
When the motor will not rotate, increase the Pr. 0 value by 1% by
looking at the motor movement. (The guideline is for about 10%
change at the greatest.)
Operation Display
1.
Screen at powering ON
The monitor display appears.
2. Press to choose the PU operation mode.
PU indication is lit.
3. Press to choose the parameter setting
mode.
PRM indication is lit.
(The parameter number read previously appears.)
4. Turn until (Pr. 0) appears.
5. Press to read the currently set value.
" " (6.0%(initial value)) appears for the 0.75K
or less.
(The initial value differs according to the capacity.)
6. Turn to change the set value to " "
(7.0%).
7. Press to set.
Flicker ··· Parameter setting complete!!
Turn to read another parameter.
Press to show the setting again.
Press twice to show the next parameter.
NOTE
The amount of current flows in the motor may become large according to the conditions such as the motor
characteristics, load, acceleration/deceleration time, wiring length, etc. After overcurrent trip, E.OC1 (overcurrent trip
during acceleration)), overload trip (E.THM (motor overload trip), or E.THT (inverter overload trip) may occur.
(When a fault occurs, release the start command, and decrease the Pr. 0 setting by 1% to reset.) (Refer to page 96.)
POINT
If the inverter still does not operate properly after the above measures, set Pr. 80 (General-purpose magnetic flux
vector control). The Pr. 0 setting is invalid under General-purpose magnetic flux vector control.
( Refer to
Chapter 4 of the Instruction Manual (Applied)).
V/F
V/F
Output voltage
r. 0
r. 46
Setting range
Output
frequency
(Hz)
Base
frequency
0
100%
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