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

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
" ".
7.
Press to set.
REMARKS
· A too large setting may cause the motor to overheat, resulting in an overcurrent trip (OL (overcurrent alarm) then E.OC1 (Overcurrent
shut-off during acceleration)), thermal trip (E.THM (Motor overload shut-off), and E.THT (Inverter overload shut-off)).
When an error (E.OC1) occurs, release the start command, and decrease the Pr. 0 value 1% by 1% to reset. (Refer to page 95.)
POINT
If the inverter still does not operate properly after the above measures, adjust Pr. 80 Motor capacity(simple magnetic
flux vector control) [extended mode]. (Refer to
Initial Value
00023
00038 to 00083
00126, 00170
00250 to 00770
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.
Instruction Manual (applied).)
Increase the starting torque (Pr. 0)
Setting
Range
6%
4%
3%
0 to 30%
2%
1.5%
1%
100%
Output
voltage
Pr.0
Setting
Pr.46
range
Display
PU indication is lit.
The parameter
number read
previously appears.
Flicker ··· Parameter setting complete!!
Description
Motor torque in the low-
frequency range can be
adjusted to the load to increase
the starting motor torque.
Output
0 Base
frequency
frequency
(Hz)
The initial value
differs according
to the capacity.
4
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