YASKAWA U1000 - L9: Drive Protection 2

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L8-94: LSo Detection Level at Low Speed
Determines the detection level of Sto at low speed. Set as a percentage of the maximum frequency (E1-04).
No. Name Setting Range Default
L8-94 LSo Detection Level at Low Speed 0 to 10% 3%
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L8-95: Average LSo Frequency at Low Speed
Sets the average number of times LSo can occur at low speed.
No. Name Setting Range Default
L8-95 Average LSo Frequency at Low Speed 1 to 50 times 10 times
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L9: Drive Protection 2
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L9-03: Carrier Frequency Reduction Level Selection
Selects start or clear current level for automatic carrier frequency reduction. There is normally no need to change this parameter
from the default value.
No. Name Setting Range Default
L9-03 Carrier Frequency Reduction Level Selection 0, 1 0
Setting 0: Reduces the Carrier Frequency Based on the Drive Rated Current that Is Not Derated
Setting 1: Reduces the Carrier Frequency Based on the Drive Rated Current that Is Derated by the Carrier Frequency
and Temperature with C6-02 Selection
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L9-12: SoH Alarm Selection during bb
Sets the SoH (Snubber Discharge Resistor Overheat) alarm to output a fault or a minor fault during baseblock (bb). There is
normally no need to change this parameter from the default value.
Note: This parameter is available in drive software versions PRG: 1015 and later.
No. Name Setting Range Default
L9-12 SoH Alarm Selection during bb 0, 1 0
Setting 0: Outputs a Fault for an SoH Alarm during Baseblock (bb)
Setting 1: Outputs a Minor Fault for an SoH Alarm during Baseblock (bb)
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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Parameter Details