YASKAWA AC Drive-A1000 Technical Manual page 266

5.8 L: Protection Functions
n L8-18: Software Current Limit Selection
Enables or disables the Software Current Limit (CLA) protection function to prevent main circuit transistor failures caused
by high current.
Note: Do not change this setting unless absolutely necessary. Leave the Software CLA enabled for proper drive protection and operation.
No.
L8-18
Setting 0: Software CLA disabled (gain = 0)
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 Software CLA current level is reached, the drive reduces the output voltage to reduce the current. Normal operation
continues when the current level drops below the Software CLA level.
n L8-27: Overcurrent Detection Gain
Note: PM motor control modes are not available on 600 V class drives, CIMR-Ao5oooooooo.
Adjusts the overcurrent detection level 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 and prevent motor demagnetization from high current.
Overcurrent detection uses the lower value between the overcurrent level for the drive and the motor rated current multiplied
by L8-27.
No.
L8-27
n L8-29: Current Imbalance Detection (LF2)
Note: PM motor control modes are not available on 600 V class drives, CIMR-Ao5oooooooo.
Enables or disables output current imbalance detection in OLV/PM, AOLV/PM, or CLV/PM. Current imbalance can heat a
PM motor and demagnetize the magnets. The current imbalance detection function monitors output current and triggers the
LF2 fault to prevent such motor damage.
No.
L8-29
Setting 0: Disabled
No current imbalance 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.
n
L8-35: Installation Method Selection
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly.
Note: 1. Initialization does not reset this parameter.
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
Setting 0: IP00 Enclosure
For an IP00 enclosure drive installed with at a minimum of 30 mm space to the next drive or a cabinet wall.
Setting 1: Side-by-Side mounting
For drives mounted according to Yaskawa Side-by-Side specifications (requires 2 mm between drives).
Setting 2: IP20 or NEMA Type 1
For drives compliant with IP20 or NEMA Type 1 enclosure specifications.
266
Name
Software Current Limit Selection
Name
Overcurrent Detection Gain
Name
Current Imbalance Detection (LF2)
Name
Installation Method Selection
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Setting Range
0, 1
Setting Range
0.0 to 300.0%
Setting Range
0, 1
Setting Range
Determined by
0 to 3
C6-01 and o2-04
Default
0
Default
300.0%
Default
1
Default