YASKAWA T1000V Technical Manual page 203

■ L8-18: Software Current Limit Selection
The Software Current Limit (CLA) is a drive protection function that prevents output transistor failures caused by high
current. Parameter L8-18 enables or disables this function.
Note: This setting should not be changed unless absolutely necessary. For proper drive protection and operation leave the Software
CLA function enabled.
No.
L8-18
<1> Default setting depends on the control mode selection in parameter A1-02. The value shown here is for V/f Control.
Dependent Parameter Default Values on page
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.
L8-29: Current Unbalance Detection (LF2)
■
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 in case of
current unbalance.
No.
L8-29
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.
L8-35: Installation Method Selection
■
Selects the type of installation 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 heatsink-cooled drive with the heatsink outside the cabinet.
No.
L8-35
Setting 0: Heatsink-Cooled Drive
Must be selected if IP20/IP00 heatsink-cooled drives are installed with minimal 30 mm space to the next drive or a
cabinet wall.
Setting 1: Side-by-Side Mounting
Must be selected if drives are Side-by-Side mounted with a minimum space of 2 mm.
Setting 2: IP20/NEMA Type 1 Drive
Must be selected if the drive has a IP20/NEMA Type 1 enclosure.
Setting 3: Finless Drive or External Heatsink Installation
Must be selected for finless drives or if a heatsink-cooled drive is mounted with the heatsink outside the cabinet.
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Name
Software Current Limit Selection
364.
Name
Current Unbalance Detection (LF2)
Name
Installation Method Selection
5.8 L: Protection Functions
Setting Range
0 or 1
Refer to Control Mode
Setting Range
0 or 1
Setting Range
Determined by
0 to 3
Default
1
<1>
Default
1
Default
o2-04
5
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