Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 697
When L1-09 ≠ 0.0 A, the set value is the reference for motor overload protection.
Note:
• Display is in these units:
–0.01 A: B001 to B018, 2001 to 2042, 4001 to 4023
–0.1 A: 2056 to 2082, 4031 to 4060
• When the current level > 0.0 A, you cannot set this value < 10% of drive rated current.
■ L1-13: Motor Overload Memory Selection
No.
(Hex.)
Name Description
Default
(Range)
L1-13
(046D)
Motor Overload Memory
Selection
Sets the function that keeps the current electronic thermal protector value when the drive stops
receiving power.
1
(0, 1)
0 : Disabled
1 : Enabled
Sets if the drive will calculate the motor again when the drive is energized again.
■ L1-22: Leakage Current Filter Time1
No.
(Hex.)
Name Description
Default
(Range)
L1-22
(0768)
RUN
Leakage Current Filter
Time1
Sets the leakage current detection reduction filter time constant during constant speed run.
Determined by C6-02
(0.0 - 60.0 s)
Note:
You can set this parameter when C6-02 = B [Carrier Frequency Selection = Leakage Current Detection Reduction Rate PWM].
If incorrect detection of alarms, for example oL1 [Motor Overload], occur or errors occur in the values on the
current monitor because of a leakage current, increase the setting value.
■ L1-23: Leakage Current Filter Time2
No.
(Hex.)
Name Description
Default
(Range)
L1-23
(0769)
RUN
Leakage Current Filter
Time2
Sets the leakage current detection reduction filter time constant during acceleration/deceleration.
Determined by C6-02
(0.0 - 60.0 s)
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 will start up slowly. Examine the relevant sequence for problems.
If errors occur in the values on the current monitor during acceleration/deceleration, increase the setting value.
◆ L2: Power Loss Ride Through
L2 parameters set the drive operation during momentary power loss and the KEB Ride-Thru function method of
operation.
■ KEB Ride-Thru Function
KEB is an acronym for Kinetic Energy Backup. If the drive detects a power loss or momentary power loss, it will
quickly decelerate the motor. The drive uses regenerative energy from the motor to keep the main circuit
operating. When you return power during motor deceleration, the drive returns operation to the status before the
power loss. The KEB Ride-Thru function is different than other functions for continuous operation. If the drive
detects momentary power loss, the motor will ramp to stop. It will not coast to stop. This function is applicable for
applications in which it is necessary to prevent materials from running out, for example control for film and fiber
lines.
The KEB Ride-Thru function has 4 methods of operation. Parameter L2-29 [Kinetic Energy Backup Method] sets
the method.
When you use the KEB Ride-Thru function with one drive, set L2-29 = 0, 1 [Single Drive KEB Ride-Thru 1,
Single Drive KEB Ride-Thru 2].
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