Parameter Details
11
11.9 L: Protection Functions
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 983
The drive uses the deceleration time set in C1-09 [Fast Stop Time] to stop the motor. Fault relay output terminal
MA-MC will activate, and MB-MC will deactivate.
3 : Alarm Only
oH is shown on the keypad and operation continues. The output terminal set for Alarm [H2-01 to H2-03 = 10]
activates.
4 : Operate at Reduced Speed (L8-19)
The drive decelerates to the level set in L8-19 [Freq Reduction @ oH Pre-Alarm] and continues operation. FAn
flashes on the keypad. Refer to “L8-03: Overheat Pre-Alarm Ope Selection” for more information about drive
derating operation.
■ L8-35: Installation Method Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-35
(04EC)
Installation Method
Selection
Sets the type of drive installation.
Determined by the
drive model
(0 - 3)
Note:
• Parameter A1-03 [Initialize Parameters] does not initialize this parameter.
• This parameter is set to the correct value when the drive is shipped. Change the value only in these conditions:
–Side-by-Side installation
–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
Use this setting to install an IP20 Open Type enclosure drive.
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 : IP21/NEMA Type 1/IP55
Use this setting to install UL Type 1 enclosed wall-mounted type drives or IP55 drives.
3 : Finless / External Heatsink
Use this setting to install finless type drives or when the heatsink (cooling fin) is outside the enclosure panel.
■ L8-38: Carrier Frequency Reduction
No.
(Hex.)
Name Description
Default
(Range)
L8-38
(04EF)
Carrier Frequency
Reduction
Sets the carrier frequency reduction function. The drive reduces the carrier
frequency when the output current is more than a specified level.
Determined by A1-
02, C6-01, and o2-04
(0 - 2)
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:
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