5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual 233
■ L6-13: Motor Underload Protection Selection
Sets the Motor Underload Protection (UL6) based on motor load.
Selects the operation of underload detection function UL6. Underload is detected when the output current falls below the
underload detection level defined by L6-14 and L2-02. Parameter L6-13 defines what the level of L6-02 refers to, either
fbase or fmax.
Setting 0: Fbase Motor load Enabled
Setting 1: Fmax base Motor load Enabled
Figure 5.80
Figure 5.80 Motor Underload Protection
■ L6-14: Motor Underload Protection Level at Minimum Frequency
Sets the UL6 detection level at minimum frequency by percentage of drive rated current.
◆ L8: Drive Protection
■ L8-02: Overheat Alarm Level
Sets the overheat alarm (oH) detection level.
The drive will output an alarm when the heatsink temperature exceeds the alarm level set in parameter L8-02. If the
operation when this alarm occurs is set for continued operation (L8-03 = 4) and the temperature reaches the overheat
fault level, the drive will trigger an oH1 fault and stop operation.
When an output terminal is set for the oH pre-alarm (H2- = 20), the switch will close when the heatsink temperature
rises above L8-02.
No. Name Setting Range Default
L6-13 Motor Underload Protection Selection 0 to 1 0
No. Name Setting Range Default
L6-14 Motor Underload Protection Level at Minimum Frequency 0 to 300% 15%
No. Name Setting Range Default
L8-02 Overheat Alarm Level 50 to 150 °C Determined by o2-04
UL Detection Level
L6-02
(0~300%)
0 Fmin Fbase
1/f
Fmax
Output Frequency
L6-14
Motor Under-Load
Protection Level at Fmin
SIEP_C710616_35.book 233 ページ ２０１５年１１月３０日 月曜日 午後２時２分
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