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The ratio of the voltage to the frequency can be adjusted to the motor capacity. Setting
at enables the inverter to prevent the output voltage from increasing with the
input voltage when the operation frequency is higher than the base frequency.
[=
: no voltage compensation/not limited] [=: voltage compensation/not limited]
, ,
[
=: no voltage compensation/limited
] [
=: voltage compensation/limited
]
, ,
6.13.7 Prohibiting the reverse operation
Reverse-run prohibition
[Parameter setting]
Title Function Adjustment range Default setting
Reverse-run
prohibition
: Permitted, : Reverse run prohibited : Forward run prohibited,
: Direction designated by command permitted(
*1)
(*1): Top priority is given to the command specifying the direction of rotation (forward run or reverse
run command).In preset-speed operation mode or forced jog run mode, you can prevent the motor
from rotating in the opposite direction to that specified by the forward run or reverse run command.
Caution!
This parameter is invalid in positioning mode. In addition, if the motor runs in a prohibited direction in
preset-speed mode or forced jog run, operation commands become invalid irrespective of the control mode.
If the motor constant is not set optimally in vector-control, automatic-torque boost mode, the motor may
slightly run in reverse direction because of the slip frequency. Before using this parameter, set parameter
(stop frequency) at a frequency close to the slip frequency. When the inverter is in sensor vector
control mode (
=
and
=
), depending on the setting of
, the motor may rotates in the
opposite direction to that prohibited when it is turned off and then on again, regardless of the setting of this
parameter.
Function
The function prevents the direction of operation from being reversed in case an in
correct operation signal is given.
Rated volta
g
e
1: no voltage higher than
the input voltage is put out.
Output
voltage
[V]
Output frequency
0
high
low
Input voltage
[V]
0
high
low
Input
voltage
Output
voltage
Output frequency
Rated voltage
1, no voltage higher than
the input voltage is put out.
The output voltage can exceed
if the output
frequency is higher than the base frequency ##,
even when
is lower than the input voltage.
high
low
Input voltage
Rated voltage
input
voltage
[V]
0
Output
voltage
Output frequency
Input voltage
[V]
high
low
0
Output frequency
Output
voltage
Rated voltage
input
voltage