Parameter List
11
11.11 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 419
11.11 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 : No
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)
200
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)
202
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
3 : Alarm Only
3
(0 - 3)
203
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
1
(0 - 2)
203
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)
696
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)
696
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)
696
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)
697
L1-22
(0768)
RUN
Leakage Current Filter
Time1
Sets the leakage current detection reduction filter time constant during constant speed
run.
Note:
You can set this parameter when C6-02 = B [Carrier Frequency Selection =
Leakage Current Detection Reduction Rate PWM].
Determined by C6-02
(0.0 - 60.0 s)
697
L1-23
(0769)
RUN
Leakage Current Filter
Time2
Sets the leakage current detection reduction filter time constant during acceleration/
deceleration.
Note:
• You can set this parameter when C6-02 = B [Carrier Frequency Selection =
Leakage Current Detection Reduction Rate PWM].
• When the setting value increases, the current monitor also starts up slowly.
Examine the relevant sequence for problems.
Determined by C6-02
(0.0 - 60.0 s)
697
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