YASKAWA GA800 Programming Manual page 480

2.9 L: Protection Functions
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 Open-chassis type (IP20) drive to convert the drive to an Enclosed wall-mounted type (UL Type
1).
The overload protection detection level for the drive is automatically adjusted to the optimal value in accordance with
the setting value.
0 : IP20/OpenChassis Enc/Ex Heatsink
Use this setting to install an open-chassis type (IP20) drive or when the heatsink (cooling fin) is outside of the
enclosure panel.
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.
Make sure that there is 2 mm (0.08 in) minimum of space between drives.
2 : IP20/NEMA Type 1/IP55
Use this setting to install UL Type 1 enclosed wall-mounted type drives or IP55 drives.
3 : Finless
Use this setting to install a finless drive (no heatsink).
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L8-38: Carrier Frequency Reduction
No.
Name
(Hex.)
L8-38 Carrier Frequency Reduction
(04EF)
If you decrease the carrier frequency, it increases the overload tolerance. The overload capacity increases temporarily
for oL2 [Drive Overloaded] and lets the drive operate through transient load peaks and not trip.
0 : Disabled
The drive will not decrease the carrier frequency at high current.
1 : Enabled below 6 Hz
The drive decreases the carrier frequency at speeds less than 6 Hz when the current is more than 100% of the drive
rated current.
When the current is less than 88% or the output frequency is more than 7 Hz, the drive goes back to the usual carrier
frequency.
2 : Enabled for All Speeds
The drive decreases the carrier frequency at these speeds:
• Output current is a minimum of 100% of the drive rated current and the frequency reference is less than 6 Hz.
480
V/f CL-V/f OLV CLV AOLV
Sets the type of drive installation.
V/f CL-V/f OLV CLV AOLV
Sets the carrier frequency reduction function. The drive reduces the carrier frequency when the
output current is more than a specified level.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
Determined by the drive
(0 - 3)
Default
(Range)
Determined by A1-02, C6-
01 and o2-04
(0 - 2)