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îš‹ Limiting Motor Torque (Torque Limit Function)
The motor torque limit function is enabled with flux vector control and open-loop vector control.
In the open-loop vector control and flux vector control, the user-set value is applied to the torque limit by cal-
culating internally the torque output by the motor. Enable this function if you do not want a torque above a
specified amount to be applied to the load, or if you do not want a regeneration value above a specified
amount to occur.
îš„Related Constants
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
L7-01
Forward
drive torque
limit
Sets the torque limit value as a percentage
of the motor rated torque.
Four individual regions can be set.
0 to 300 200% No No No A A A
Torq Limit
Fwd
L7-02
Reverse
drive torque
limit
0 to 300 200% No No No A A A
Torq Limit
Rev
L7-03
Forward
regenerative
torque limit
0 to 300 200% No No No A A A
Torq Lmt
Fwd Rgn
L7-04
Reverse
regenerative
torque limit
0 to 300 200% No No No A A A
Torq Lmt
Rev Rgn
L7-06
Integral time
setting for
torque limit
Set the integral time for the torque limit.
When integral control is set for the torque
limit, reduce this setting to increase the
change in frequency for the torque limit.
*Normally handled with PRG: 103.
5 to
10,000
200 ms No No No A No No
Torq Limit
Time
L7-07
Control
method
selection for
torque limit
during
accelera-
tion and
deceleration
Select the control method for the torque
limit during acceleration and deceleration.
0: Proportional control (integral control
during constant speed)
1: Integral control
Normally, this constant does not need to be
set.
*Normally handled with PRG: 103.
0, 1 0 No No No A No No
Torque
Limit Sel
Output torque
Positive torque
Reverse
Negative torque
No. of
motor
rotations
Regenerative
state
Regenerative
state
Forward
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