YASKAWA CIPR-GA50C series Technical Manual page 707

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L8-29: Output Unbalance Detection Sel
No.
Name
(Hex.)
L8-29 Output Unbalance
Detection Sel
(04DF)
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
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L8-31: LF2 Detection Time
No.
Name
(Hex.)
L8-31 LF2 Detection Time
(04E1)
When the output current is unbalanced for longer than the time set in L8-31, the drive detects LF2.
Note:
• Set L8-29 = 1 [Output Unbalance Detection Sel = 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 = Permanent Magnet (PM)] in EZ Vector Control.
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L8-35: Installation Method Selection
No.
Name
(Hex.)
L8-35 Installation Method
Selection
(04EC)
Note:
• Parameter A1-03 [Initialize 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 as specified by ambient temperature.
0 : IP20/UL Open Type
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 : IP20/UL Type 1
Use this setting to install IP20/UL Type 1 or IP55 drives.
3 : External Heatsink
Use this setting when the heatsink (cooling fin) is outside the control panel.
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L8-40: Carrier Freq Reduction Off-Delay
No.
Name
(Hex.)
L8-40 Carrier Freq Reduction Off-
Delay
(04F1)
YASKAWA SIEPC71061753A GA500 Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the function to detect LF2.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the LF2 [Output Current Imbalance] detection time.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the type of drive installation.
Derating Depending on Ambient Temperature on page 324
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the length of time until the automatically reduced carrier frequency returns to the condition
before the reduction.
12.9 L: Protection Functions
Description
Description
Description
Description
Default
(Range)
1
(0, 1)
Default
(Range)
3
(1 – 100)
Default
(Range)
0
(0 - 3)
for information about
Default
(Range)
Determined by A1-02
(0.00 - 2.00 s)
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