10.11 L: Protection Functions
568 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
10.11 L: Protection Functions
◆ L1: Motor Protection
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L1-01
(0480)
Motor Overload
(oL1) Protection
Sets the motor overload protection with electronic thermal
protectors.
0 : Disabled
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)
277
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)
280
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)
281
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)
281
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)
944
L1-08
(1103)
oL1 Current Level
Sets the reference current for the motor 1 thermal overload
detection.
Note:
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)
944
L1-09
(1104)
oL1 Current Level
for Motor 2
Sets the reference current for the motor 2 thermal overload
detection.
Note:
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)
945
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)
945
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