6-42
îš‹ Limiting Motor Torque (Torque Limit Function)
The motor torque limit function is enabled only with open-loop torque control.
In the open-loop vector control method, the user-set value is applied to the torque limit by calculating inter-
nally 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 Parameters
Multi-function Analog Input (H3-05, H3-09)
Note The forward torque limit is the limit value when the analog input signal generates forward torque. This torque limit setting is enabled even when the
analog input signal generates forward torque while the motor is operating (regeneration).
Parame-
ter
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
L7-01
Forward
Torque
Limit
Sets the torque limit value as a percentage
of the motor rated torque. Four individual
quadrants can be set.
0 to 300 200% No No No A A A
Torq Limit
Fwd
L7-02
Reverse
Torque
Limit
0 to 300 200% No No No A A A
Torq Limit
Rev
L7-03
Forward
Regenera-
tive Torque
Limit
0 to 300 200% No No No A A A
Torq Lmt
Fwd Rgn
L7-04
Reverse
Regenera-
tive Torque
Limit
0 to 300 200% No No No A A A
Torq Lmt
Rev Rgn
Setting
Value
Function Contents (100%)
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
10 Positive torque limit Motor's rated torque No No Yes Yes Yes
11 Negative torque limit Motor's rated torque No No Yes Yes Yes
12 Regenerative torque limit Motor's rated torque No No Yes Yes Yes
15 Positive/negative torque limit Motor's rated torque No No Yes Yes Yes
Output torque
Positive torque
Reverse
Negative torque
No. of
motor
rotations
Regenerative
state
Regenerative
state
Forward
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