YASKAWA L1000A Technical Manual page 214

5.8 L: Protection Functions
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L8-12: Ambient Temperature Setting
If the temperature where the drive is mounted is above the specified values, the drive rated current must be reduced for
optimal performance life. By setting the ambient temperature to parameter L8-12 and adjusting the installation method
setting in L8-35, the drive rating automatically adapts to safe values.
No.
L8-12
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L8-15: oL2 (Drive Overload) Characteristics Selection at Low Speeds
Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds in order to prevent
premature output transistor failures.
Note: Contact Yaskawa for consultation first before disabling this setting.
No.
L8-15
Setting 0: Protection disabled at low speed
The overload protection level is not reduced. Frequently operating the drive with high output current at low speed can
lead to premature drive faults.
Setting 1: protection enabled at low speed
The overload protection level (oL2 fault detection level) is automatically reduced at speeds below 6 Hz.
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L8-27: Overcurrent Detection Gain
Adjusts the overcurrent detection level when running in CLV/PM. A setting of 100% is equal to the motor rated current.
When the drive rated current is considerably higher than the motor rated current, use this parameter to decrease the
overcurrent level in order to prevent motor demagnetization by too high current.
Overcurrent detection will use whichever value is the lowest: the overcurrent level for the drive, or the motor rated
current multiplied by L8-27.
No.
L8-27
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L8-29: Current Unbalance Detection (LF2)
Enables or disables output current imbalance detection when running in CLV/PM. Current unbalance can heat up a PM
motor and lead to demagnetization of the magnets. The current imbalance detection function prevents such motor damage
by monitoring output current and triggering the LF2 fault when current unbalance occurs.
No.
L8-29
Setting 0: Disabled
No current unbalance protection is provided to the motor.
Setting 1: Enabled
The LF2 fault is triggered if an output current imbalance is detected. Drive output shuts off and the motor coasts to stop.
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L8-35: Installation Selection
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly.
Note: This parameter is not reset when the drive is initialized.
No.
L8-35
214
Name
Ambient Temperature Setting
Name
oL2 Characteristics Selection at Low Speed
Name
Overcurrent Detection Gain
Name
Current Unbalance Detection (LF2)
Name
Installation Selection
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Setting Range
-10 to 50 °C
Setting Range
0 or 1
Setting Range
0.0 to 300.0%
Setting Range
0 or 1
Setting Range
0 or 2 Determined by o2-04
Default
40 °C
Default
1
Default
300.0%
Default
1
Default