12.8 L: PROTECTION
672 SIEPCYEUOQ2V01A Q2V Technical Manual
■ L8-29: LF2 Unbalance Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-29
(04DF)
LF2 Unbalance Selection
Sets the function to detect LF2.
1
(0, 1)
This function prevents damage to PM motors. Current unbalance can heat a PM motor and demagnetize the
magnets. When the current is unbalanced, the drive will detect LF2 to stop the motor and prevent damage to the
motor.
0 : Disabled
1 : Enabled
■ L8-31: LF2 Detect Time
No.
(Hex.)
Name Description
Default
(Range)
L8-31
(04E1)
LF2 Detect Time
Sets the LF2 [Output Current Imbalance] detection time.
3
(1 – 100)
When the output current is unbalanced for longer than the time set in L8-31, the drive detects LF2.
Note:
• Set L8-29 = 1 [LF2 Unbalance Selection = Enabled] to enable L8-31.
• If the drive incorrectly detects LF2, increase L8-31 in 5-unit increments.
• The keypad shows L8-31 when E9-01 = 1 [Motor Type Selection = PM] in EZ Vector Control.
■ L8-35: Installation Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-35
(04EC)
Installation Selection
Sets the type of drive installation.
0
(0 - 3)
Note:
• Parameter A1-03 [Init Parameters] does not initialize this parameter.
• This parameter is set to the correct value when the drive is shipped. Side-by-Side installation
–Change the value only in these conditions:
–When you install a UL Type 1 kit on an IP20/UL Open Type drive to convert the drive to an IP20/UL Type 1 drive.
–Mounting a standard drive with the heatsink outside the enclosure panel.
The overload protection detection level for the drive is automatically adjusted to the optimal value in accordance
with the setting value. Refer to Derating Depending on Ambient Temperature on page 303 for information about
derating as specified by ambient temperature.
0 : IP00/IP20/Open-Chassis
Use this setting to install IP20/UL Open Type drives.
Make sure that there is 30 mm (1.18 in) minimum of space between drives or between the drive and side of the
enclosure panel.
1 : Side-by-Side Mounting
Use this setting to install more than one drive side-by-side.
2 : UL Type 1
Use this setting to install IP20/UL Type 1 or IP55 drives.
3 : Ext. Heatsink
Use this setting when the heatsink (cooling fin) is outside the control panel.
■ L8-40: Carrier Red Off-Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L8-40
(04F1)
Carrier Red Off-Delay Time
Sets the length of time until the automatically reduced carrier frequency returns to the condition
before the reduction.
Determined by A1-02
(0.00 - 2.00 s)
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