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Protection Function Parameters: L
The following settings are made with the protection function parameters (L parameters): Motor selection func-
tion, power loss ridethrough function, stall prevention function, frequency detection, torque limits and hard-
ware protection.
„
Motor Overload: L1
Parame-
ter
LCD Display
Number
Motor protec-
tion selection
L1-01
MOL Fault Sel
Motor protec-
parameter
L1-02
MOL Time
Alarm opera-
tion selection
during motor
overheating
L1-03
Mtr OH Alarm
Motor over-
heating opera-
tion selection
L1-04
Mtr OH Fault
Motor temper-
ature input fil-
parameter
L1-05
Mtr Temp Filter
-26
5
Name
Description
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay.
0: Disabled
1: General-purpose motor protec-
tion
In some applications 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.
Sets the electric thermal detection
tion time
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 resis-
Const
tance is known, also set the over-
load resistance protection time for
when the motor is hot started.
Set H3-09 to E and select the
operation when the input motor
temperature (thermistor) input
exceeds the alarm detection level
(1.17 V).
0: Decelerate to stop
1: Coast to stop
Sel
2: Emergency stop using the
deceleration time in C1-09.
3: Continue operation (OH3 on
the Operator flashes).
Set H3-09 to E and select the
operation when the motor temper-
ature (thermistor) input exceeds
the operation detection level (2.34
V).
0: Decelerate to stop
Sel
1: Coast to stop
2: Emergency stop using the
deceleration time in C1-09.
Set H3-09 to E and set the primary
ter time
delay time parameter for motor
temperature (thermistor) inputs in
seconds.
Change
Setting
Factory
during
Access
Range
Setting
Opera-
Level
tion
0 or 1
1
No
Q
0.1 to
1.0 min
No
A
5.0
0 to 3
3
No
A
0 to 2
1
No
A
0.00 to
0.20 s
No
A
10.00
RS-422A/
485
Page
Register
4-7
480H
6-33
481H
6-33
482H
6-35
483H
6-35
484H
6-35
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Troubleshooting
