5-32
Protection Function Constants: L
Motor Overload: L1
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
MEMO-
BUS
Register
Page
L1-01
Motor protection
selection
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay.
0: Disabled
1: General-purpose motor
protection (fan cooled motor)
When several motors are con-
nected to one Inverter, set to 0 and
ensure that each motor is installed
with a protection device.
0 or 1 1 No Q 480H 6-33
L1-02
Motor protection
time constant
Sets the electric thermal detection
time in seconds units.
Usually changing this setting is not
necessary.
The factory setting is 150% over-
load for one minute.
When the motor's overload capabil-
ity is known, also set the overload
resistance protection time for when
the motor is hot started.
0.1 to
5.0
1.0 min No A 481H 6-33
L1-03
Alarm operation
selection during
motor overheating
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: Emergency stop using the
deceleration time in C1-09.
3: Continue operation (oH3 on the
Operator flashes).
0 to 3 3 No A 482H 6-35
L1-04
Motor overheat-
ing operation
selection
Selects the operation when the
motor temperature (thermistor)
input exceeds the overheating
detection level (2.34 V) (H3-09
must be set to E).
0: Decelerate to stop
1: Coast to stop
2: Emergency stop using the
deceleration time in C1-09.
0 to 2 1 No A 483H 6-35
L1-05
Motor tempera-
ture input filter
time constant
Sets H3-09 to E and sets the delay
time constant for the motor temper-
ature (thermistor) input in seconds.
0.00 to
10.00
0.20 s No A 484H 6-35
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