10-8
Param-
eter
No.
Ref-
er-
ence
page
Changes
during
opera-
tion
Default
setting
Unit
of
set-
ting
Set-
ting
range
DescriptionNameRegis-
ter No.
(Hex)
n037 0125 Motor protec-
tion charac-
teristics
Used to set the motor overload detec-
tion (OL1) for the electronic thermal
characteristics of the motor.
0: Protection characteristics for gen-
eral-purpose induction motors
1: Protection characteristics for
inverter-dedicated motors
2: No protection
* If a single Inverter is connected to
more than one motor, set the
parameter to 2 for no protection.
The parameter is also disabled by
setting n036 for rated motor to 0.0.
0 to 2 1 0 No 6-39
n038 0126 Motor protec-
tive time
Used to set the electric thermal char-
acteristics of the motor to be con-
nected in 1-minute increments.
* The default setting does not
require any changes in normal
operation.
* To set the parameter according to
the characteristics of the motor,
check with the motor manufacturer
the thermal time constant and set
the parameter with some margin.
In other words, set the value
slightly shorter than the thermal
time constant.
* To detect motor overloading
quicker, reduce the set value, pro-
vided that it does not cause any
application problems.
1 to 60 1 min 8 No 6-39
n039 0127 Cooling fan
operation
Used to operate the Cooling Fan of
the Inverter while the Inverter is
turned ON or only while the Inverter is
in operation.
0: Rotates only while RUN command
is input and for 1 minute after
Inverter stops operating
1: Rotates while Inverter is turned ON
* This parameter is available only if
the Inverter incorporates a Cooling
Fan.
* If the operation frequency of the
Inverter is low, the life of the fan
can be prolonged by setting the
parameter to 0.
0, 1 1 0 No 6-40
n040 0128 Motor rotation
direction
0: A forward command rotates the
motor counterclockwise when
viewed from the load.
1: A forward command rotates the
motor clockwise when viewed from
the load.
0, 1 1 0 No ---
List of Parameters Chapter 10
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