YASKAWA T1000A Technical Manual page 232

5.8 L: Protection Functions
Setting 0: Software CLA disabled
The drive may trip on an oC fault if the load is too heavy or the acceleration is too short.
Setting 1: Software CLA enabled
When the soft CLA current level is reached, the drive reduces the output voltage in order to reduce the current. If the
current level drops below the Software CLA level, then normal operation will continue.
n
L8-27: Overcurrent Detection Gain
Adjusts the overcurrent detection level when running in OLV/PM, AOLV/PM, or 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
n
L8-29: Current Unbalance Detection (LF2)
Enables or disables output current imbalance detection when running in OLV/PM, AOLV/PM, or 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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L8-32 Main Contactor and Cooling Fan Power Supply Failure Selection
Determines drive operation when a FAn fault occurs.
No.
L8-32
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time1 set in parameter C1-02.
Setting 1: Coast to stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Fast stop
The drive stops the motor using the Fast stop time set in parameter C1-09.
Setting 3: Alarm only
The operation is continued and a FAn alarm is displayed on the digital operator.
Note: FAn is detected as an error when setting 0 to 2 is selected. It is detected as an alarm when setting 3 is selected.
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L8-35: Installation Method Selection
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly.
Note: 1. This parameter is not reset when the drive is initialized.
2. The value is preset to the appropriate value when the drive is shipped. Change the value only when using Side-by-Side installation or
when mounting a standard drive with the heatsink outside the cabinet.
No.
L8-35
232
Name
Overcurrent Detection Gain
Name
Current Unbalance Detection (LF2)
Name
Main Contactor and Cooling Fan Power Supply Failure Selection
Name
Installation Method Selection
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Setting Range
0.0 to 300.0%
Setting Range
0 or 1
Setting Range
0 to 3
Setting Range
0 to 3 Determined by o2-04
Default
300.0%
Default
1
Default
1
Default