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5
îš‹ Protection Function Parameters: L
îš„Motor Overload: L1
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Register
Page
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
Display
L1-01
Motor pro-
tection
selection
Sets whether the motor thermal
overload protection function is
enabled or disabled.
0: Disabled
1: General-purpose motor
protection (fan cooled
motor)
2: Inverter motor protection
(externally cooled motor)
3: Vector motor protection
When the Inverter power
supply is turned off, the
thermal value is reset, so
even if this parameter is set
to 1, protection may not be
effective.
When several motors are con-
nected to one Inverter, set to
L1-01 to 0 and ensure that each
motor is installed with a pro-
tection device.
0 to 3 1 No Q Q Q Q 480H
4-5
6-51
MOL Fault
Select
L1-02
Motor pro-
tection time
constant
Sets the electric thermal detec-
tion time in seconds units.
Usually changing this setting is
not necessary.
The factory setting is 150%
overload for one minute.
When the motor's overload
capability is known, also set
the overload resistance protec-
tion time for when the motor is
hot started.
0.1 to
5.0
1.0 min No A A A A 481H 6-51
MOL Time
Const
L1-03
Alarm oper-
ation selec-
tion during
motor over-
heating
Selects the operation when the
input motor temperature (ther-
mistor) input exceeds the alarm
detection level (1.17 V) (H3-09
must be set to E).
0: Decelerate to stop
1: Coast to stop
2: Fast stop using the
deceleration time in C1-09.
3: Continue operation (oH3
on the Operator flashes).
0 to 3 3 No A A A A 482H 6-53
Mtr OH
Alarm Sel
L1-04
Motor over-
heating
operation
selection
Selects the operation when the
motor temperature (ther-
mistor) input exceeds the over-
heating detection level (2.34
V) (H3-09 must be set to E).
0: Decelerate to stop
1: Coast to stop
2: Fast stop using the
deceleration time in C1-09.
0 to 2 1 No A A A A 483H 6-53
Mtr OH
Fault Sel
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