YASKAWA OYMC V1000, Programming Manual

Page: 222 / 408

1.8 L: Protection Functions
222 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
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L8-18: Software CLA Selection
The Software CLA (software current limit) is a drive protection function that prevents
output transistor failures by too high current. Parameter L8-18 enables or disables this
function.
NOTICE: This setting should not be changed unless absolutely necessary. For proper drive protection and
operation leave the Software CLA function enabled.
Setting 0: Disabled
The drive may trip on an OC fault if the load is too heavy or the acceleration is too short.
Setting 1: 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.
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L8-29: Current Unbalance Detection (PM OLV only)
Current unbalance can heat up a PM motor and lead to demagnetization of the magnets from
heat. The current imbalance detection function prevents such motor damage by monitoring
output currents and triggering a LF2 fault is case of current unbalance.
Setting 0: Disabled
The drive does not protect the motor.
Setting 1: Enabled
When an output current imbalance is detected, a LF2 fault is triggered, the output is
switched off, and the motor coasts to stop.
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L8-35: Installation Method Selection
Selects the type of installation and changes the drive overload (OL2) limits accordingly.
Refer to the Basic Manual for a temperature derating curve with L8-35 dependencies.
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. Name Setting Range Default
L8-18 Software Current Limit Selection 0 or 1 1
No. Name Setting Range Default
L8-29 Current Unbalance Detection (LF2) 0 or 1 1