5
-24
Torque Compensation: C4
User constants for torque compensation are shown in the following table.
* The factory setting will change when the control method is changed. The open-loop vector 1 factory settings are given.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
Display
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
C4-01
Torque com-
pensation
gain
Sets torque compensation
gain as a ratio.
Usually setting is not neces-
sary.
Adjust in the following cir-
cumstances:
• When the cable is long;
increase the set value.
• When the motor capacity is
smaller than the Inverter
capacity (Max. applicable
motor capacity), increase
the set values.
• When the motor is oscillat-
ing, decrease the set val-
ues.
Adjust the output current
range at minimum speed rota-
tion so that it does not exceed
the Inverter rated output cur-
rent.
Do not alter the torque com-
pensation gain from its
default (1.00) when using the
open-loop vector 1 control
method.
0.00 to
2.50
1.00
Yes
A
A
A
No
No
215H
4-18
6-39
Torq Comp
Gain
C4-02
Torque com-
pensation
primary
delay time
constant
The torque compensation
delay time is set in ms units.
Usually setting is not neces-
sary.
Adjust in the following cir-
cumstances:
• When the motor is oscillat-
ing, increase the set values.
• When the responsiveness
of the motor is low,
decrease the set values.
0 to
10000
20 ms
*
No
A
A
A
No
No
216H
4-18
6-39
Torq Comp
Time
C4-03
Forward
starting
torque
Sets the forward starting
torque as a percentage of the
motor rated torque.
0.0 to
200.0
0.0%
No
No
No
A
No
No
217H
-
F
TorqCmp@
start
C4-04
Reverse
starting
torque
Sets the reverse starting
torque as a percentage of the
motor rated torque.
-200.0
to 0.0
0.0%
No
No
No
A
No
No
218H
-
R
TorqCmp@
start
C4-05
Starting
torque time
constant
Sets the delay time in ms for
starting torque. The filter is
disabled if the time is set to 0
to 4 ms.
0 to
200
10 ms
No
No
No
A
No
No
219H
-
TorqCmp
DelayT
