6
-34
Related Constants
* These are values for a 200 V Class Inverter. Values for a 400 V Class Inverter are double.
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
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
L3-11
Overvoltage
inhibit selec-
tion
0: Disabled
1: Enabled
Used to enable or disable the
function for inhibiting main cir-
cuit overvoltages 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 regenerative torque less
than the set value.
0 or 1
0
No
No
No
A
A
4C7H
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 overvoltages
occur even with the overvoltage
inhibit function enabled, reduce
this setting.
350 to
390
*
380V
*
No
No
No
A
A
4C8H