Increase The Starting Torque (Pr. 0) - Mitsubishi Electric FR-F700 Series Instruction Manual

Increase the starting torque (Pr. 0)

4.2 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
Name
Number
0 Torque boost
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.)
1.
Screen at powering on
The monitor display appears.
2.
Press to choose the PU operation mode.
3.
Press to choose the parameter
setting mode.
4.
5.
Press to read the currently set value.
" "(initial value is 6% for the
FR-F740-00023) appears.
6.
Turn to change it to the set value
of " ".
7.
Press to set.
REMARKS
· A too large setting will cause the motor to overheat, resulting in an overcurrent trip (OL (overcurrent alarm) then E.OC1
(overcurrent shutoff during acceleration)), thermal trip (E.THM (Motor overload shutoff), and E.THT (Inverter overload shutoff)).
When an error (E.OC1) occurs, release the start command, and decrease the Pr. 0 value 1% by 1% to reset. (Refer to page 67.)
POINT
If the inverter still does not operate properly after the above measures, adjust Pr. 80 "Simple magnetic vector
control" [extended mode]. (Refer to the Instruction Manual (applied).)
52
Initial Value
200V class (400V class)
00046 (00023)
00077 to 00167 (00038 to 00083)
00250, 00340 (00126, 00170)
00490 to 01540 (00250 to 00770)
01870, 02330 (00930, 01160)
− (01800 or more)
Operation
Pr. 0) appears.
· By turning , you can read another parameter.
· Press to show the setting again.
· Press twice to show the next parameter.
Setting
Range
6%
4%
3%
0 to 30%
2%
1.5%
1%
Output
voltage
Pr.0
Setting
Pr.46
range
Display
PU indication is lit.
Flicker ··· Parameter setting complete!!
Description
Motor torque in the low-
frequency range can be
adjusted to the load to
increase the starting motor
torque.
100%
0 Output frequency(Hz)
The parameter
number read
previously appears.
The initial value
differs according
to the capacity.
Base
frequency