Parameter Details
5
5.8 L: Protection Functions
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference 341
â– L6-13: Motor Underload Curve Select
No.
(Hex.)
Name Description
Default
(Range)
L6-13
(062E)
Motor Underload Curve
Select
Sets the motor underload protection (UL6 [Undertorque Detection 6]) based on motor load and sets
the level of L6-02 [Torque Detection Level 1] to refer to Fbase or Fmax.
0
(0, 1)
0 : Base Frequency Enable
1 : Max Frequency Enable
If the output current is less than the curve for longer than the time set in L6-03 [Torque Detection Time 1], the drive
will detect a fault or an alarm as specified by L6-01 [Torque Detection Selection 1].
L6-02: Torque Detection Level 1
L6-13 = 0: Base Frequency Enable
L6-13 = 1: Max Frequency Enable
L6-14: Motor Underload Level @ Min Freq
Figure 5.87 UL6 Detection Curve
â– L6-14: Motor Underload Level @ Min Freq
No.
(Hex.)
Name Description
Default
(Range)
L6-14
(062F)
Motor Underload Level @
Min Freq
Sets the UL6 [Undertorque Detection 6] detection level at minimum frequency by percentage of
drive rated current.
15%
(0 - 300%)
â—† L8: Drive Protection
L8 parameters set protective functions that prevent faults such as overheating, phase loss, and ground faults.
â– L8-02: Overheat Alarm Level
No.
(Hex.)
Name Description
Default
(Range)
L8-02
(04AE)
Overheat Alarm Level Sets the oH detection level temperature. Determined by o2-04
(50 - 150 °C)
If the heatsink temperature is more than the temperature set in this parameter, the drive detects an overheat pre-alarm.
To enable this function, set one of H2-01 to H2-03 [MFDO Function Select] to 20 [Drive Overheat Pre-Alarm (oH)].
If the temperature increases to the overheat fault level, the drive will trigger an oH1 [Heatsink Overheat] fault and
stop operation.
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