Parameter List
3
3.11 L: Protection Functions
YASKAWA TOEPYAIGA8001B GA800 Drive Maintenance & Troubleshooting 225
3.11 L: Protection Functions
◆ L1: Motor Protection
No.
(Hex.)
Name Description
Default
(Range)
L1-01
(0480)
Motor Overload (oL1)
Protection
Sets the motor overload protection with electronic thermal protectors.
0 : Disable
1 : Variable Torque
2 : Constant Torque 10:1 Speed Range
3 : Constant Torque 100:1 SpeedRange
4 : PM Variable Torque
5 : PM Constant Torque
6 : Variable Torque (50Hz)
Note:
When only one motor is connected to a drive, set L1-01 = 1 to 6 [Enabled]. External thermal
relays are not necessary in these conditions.
Determined by A1-02
(0 - 6)
L1-02
(0481)
Motor Overload Protection
Time
Sets the operation time for the electronic thermal protector of the drive to prevent damage to the
motor. Usually it is not necessary to change this setting.
1.0 min
(0.1 - 5.0 min)
L1-03
(0482)
Motor Thermistor oH Alarm
Select
Sets drive operation when the PTC input signal entered into the drive is at the oH3 [Motor Overheat
Alarm] detection level.
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
3 : Alarm Only
3
(0 - 3)
L1-04
(0483)
Motor Thermistor oH Fault
Select
Sets the drive operation when the PTC input signal to the drive is at the oH4 [Motor Overheat Fault
(PTC Input)] detection level.
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
1
(0 - 2)
L1-05
(0484)
Motor Thermistor Filter
Time
Sets the primary delay time constant for the PTC input signal entered to the drive. This parameter
prevents accidental motor overheat faults.
0.20 s
(0.00 - 10.00 s)
L1-08
(1103)
oL1 Current Level
Sets the reference current for the motor 1 thermal overload detection. When the current level > 0.0 A,
you cannot set this value < 10% of drive rated current.
0.0 A
(0.0 A or 10% to 150% of
the drive rated current)
L1-09
(1104)
oL1 Current Level for Motor
2
Sets the reference current for the motor 2 thermal overload detection. When the current level > 0.0 A,
you cannot set this value < 10% of drive rated current.
0.0 A
(0.0 A or 10 to150% of the
drive rated current)
L1-13
(046D)
Motor Overload Memory
Selection
Sets the function that keeps the current electronic thermal protector value when the drive stops
receiving power.
0 : Disabled
1 : Enabled
1
(0, 1)
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