n
L8-19: Frequency Reduction Rate during Overheat Pre-Alarm
Specifies the output frequency reduction when L8-03 is set to 4 and an oH alarm is present.
No.
Name
Setting Range
Default
L8-19
Frequency Reduction Rate During Overheat Pre-Alarm
0.1 to 0.9
0.8
n
L8-27: Overcurrent Detection Gain
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.
Note:
The drive detects the lowest overcurrent from the overcurrent level of the drive, the setting value of this parameter, and the overcurrent
level determined from the motor rated current.
No.
Name
Setting Range
Default
L8-27
Overcurrent Detection Gain
0.0 to 400.0%
300.0%
n
L8-29: Current Unbalance Detection (LF2)
Enables and disables output current unbalance detection in OLV/PM, AOLV/PM, or CLV/PM. Current unbalance can heat a
PM motor and demagnetize the magnets. The current unbalance detection function monitors output current and triggers the
LF2 fault to prevent such motor damage.
No.
Name
Setting Range
Default
L8-29
Current Unbalance Detection (LF2)
0, 2
2
Setting 0: Disabled
Motor protection with LF2 is disabled.
Setting 2: Enabled
LF2 fault is triggered when an output current imbalance is detected. Drive output shuts off and the motor coasts to stop.
n
L8-32: Cooling Fan Failure Selection
Determines drive operation when a FAn fault occurs.
No.
Name
Setting Range
Default
L8-32
Cooling Fan Failure Selection
0 to 2
1
Setting 0: Ramp to Stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to Stop
The drive output is switched off and the motor coasts to a stop.
Setting 2: Fast Stop
The drive stops the motor using the Fast stop time set in parameter C1-09.
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 mounting a standard drive with the
heatsink outside the cabinet.
No.
Name
Setting Range
Default
L8-35
Installation Method Selection
0, 2, 3
Determined by
o2-04
Setting 0: IP00/Open-Chassis Enclosure
For an Open Type enclosure drive installed with at a minimum of 30 mm space to the next drive or a cabinet wall.
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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5
Parameter Details
Summary of Contents for U1000 iQpump Drive
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