Acceleration and Deceleration Characteristics
6-25
Related Constants
* These values are for a 200 V Class Inverter. For a 400 V Class Inverter, double the values.
Setting Precautions
When this function is enabled, if the main circuit voltage rises, the regenerative torque limit will decrease to a
value less than its set value and so the motor will not rotate at the speed specified by the speed reference.
Therefore, in applications where it is necessary to rotate the motor at the speed specified by the speed refer-
ence, disable this function and use a converter, a dynamic braking resistor, or a power regenerative unit to sup-
press rises in the main circuit voltage.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
L3-11
Overvoltage
inhibit selec-
tion
0: Disabled
1: Enabled
Used to enable or disable the func-
tion for inhibiting main circuit over-
voltages by reducing the
regenerative torque limit according
to the main circuit overvoltage
level.
If this function is enabled, when the
main circuit voltage rises, operation
will be performed with the regener-
ative torque less than the set value.
0 or 1 0 No No No A A A
OV Inhibit
Sel
L3-12
Overvoltage
inhibit volt-
age level
Sets the main circuit voltage level
for which the regenerative torque
limit is restricted to 0.
Usually, there is no need to change
this setting. If main circuit overvolt-
ages occur even with the
overvoltage inhibit function
enabled, reduce this setting.
350 to
390
*
380 V* No No No A A A
OV Inhbt
VoltLv1
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