YASKAWA GA700 Technical Manual page 870

11.9 L: Protection Function
The drive performs deceleration to the level set in L8-19 [Freq Reduct Rate During OH Pre-Alarm] and continues
operation. FAn flashes on the keypad. Refer to "L8-03: Overheat Pre-Alarm Ope Selection" for more information
on drive derating operation.
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L8-35: Installation Method Selection
No.
Name
(Hex.)
L8-35 Installation Method
Selection
(04EC)
Note:
• This parameter is not initialized by A1-03 [Initialize Parameters].
• 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 enclosure panel.
The overload protection detection level for the drive is automatically adjusted to the optimal value in accordance
with the setting value. Change this setting when drives are installed Side-by-Side or when mounting a standard
drive with the heatsink outside the enclosure panel.
0 : IP20/Open-Chassis enclosure
Select this setting when installing the IP20 open type enclosure drive.
Ensure that there is at least 30 mm of space between drives or between the drive and side of the enclosure panel.
1 : Side-by-Side mounting
Select this setting when multiple drives are installed Side-by-Side.
When installing drives Side-by-Side, the minimum space between drives can be as small as 2 mm.
2 : IP20/UL Type 1/IP55
Select this setting when installing UL Type 1 enclosed wall-mounted type drives or IP55 drives.
3 : Finless/Fin Ext
Select this setting when installing finless type drives or when the cooling fin (heatsink) is external to the enclosure
panel.
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L8-38: Carrier Frequency Reduction
No.
Name
(Hex.)
L8-38 Carrier Frequency
Reduction
(04EF)
As lowering the carrier frequency raises the overload tolerance, the overload capacity is increases temporarily for
oL2 [Drive Overloaded], allowing the drive to run through transient load peaks without tripping.
0 : Disabled
No carrier frequency reduction at high current.
1 : Enabled below 6 Hz
The carrier frequency is reduced at speeds below 6 Hz when the current exceeds 100% of the drive rated current.
The drive returns to the normal carrier frequency when the current falls below 88% or the output frequency
exceeds 7 Hz.
2 : Enabled for the EntireSpeedRange
The carrier frequency is reduced at the following speeds:
• Output current is at least 100% of the drive rated current while the frequency reference is lower than 6 Hz.
• Output current is at least 109% of the drive rated current while ND rating is selected and the frequency
reference is 7 or more Hz.
• Output current is at least 112% of the drive rated current while HD rating is selected and the frequency
reference is 7 or more Hz.
The drive uses the delay time set in L8-40 [CarrierFreqReduct Off DelayTime] and a hysteresis of 12% when
switching the carrier frequency back to the set value.
870
V/f CL-V/f OLV CLV AOLV
Selects the type of drive installation.
V/f CL-V/f OLV CLV AOLV
Selects the operation of the carrier frequency reduction function. The carrier
frequency is reduced when the output current exceeds a specific level.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
Determined by o2-04
(0 - 3)
Default
(Range)
Determined by A1-
02, C6-01, and o2-04
(0 - 2)