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4
DRIVING THE MOTOR
59
Before operation
4.3.4 Increase 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
7.5K or lower
3%
0 to 30%
Motor torque in the low-frequency range can be
adjusted to the load to increase the starting motor
torque.
11K or higher
2%
Changing example
When the motor with a load will not rotate,
increase the Pr. 0 value 1% by 1% unit by looking at
the motor movement. (The guideline is for about 10%
change at the greatest.)
REMARKS
· A too large setting may cause the motor to overheat, resulting in an overcurrent trip (OL (overcurrent alarm) then E.OC1
(overcurrent trip during acceleration)), overload trip (E.THM (motor overload trip), and E.THT (inverter overload trip)).
(When a fault occurs, release the start command, and decrease the Pr. 0 setting 1% by 1% to reset.)
POINT
If the inverter still does not operate properly after the above measures, adjust Pr. 80, Pr. 81 (Advanced magnetic flux
vector control), Pr.800 (Real sensorless vector control). The Pr.0 setting is invalid under Advanced magnetic flux
vector control, Real sensorless vector control and vector control. (Refer to Chapter 4 of the Instruction Manual
(Applied).)
V/F
V/F
V/F
Output
voltage
P
r. 0
P
r.46
Setting
range
Base
frequency
0
100%
Output
frequency
(Hz)
P
r. 11 2
1.Screen at power-ON
The monitor display appears.
Display
Operation
The initial value
differs according
to the capacity.
3.Press to choose the parameter
setting mode.
4. Pr. 0) appears.
Flicker ··· Parameter setting complete!!
7.Press to set.
PU indicator is lit.
2.Press to choose PU operation mode.
· Press to show the setting again.
· Press twice to show the next parameter.
· By turning , you can read another parameter.
The parameter
number read
previously appears.
6.Turn to change it to the set value
" ".
5.Press to read the currently set value.
" "(initial value is 3% for the 5.5K)
appears.