YASKAWA GA800 Programming Manual page 476

2.9 L: Protection Functions
The output turns off and the motor coasts to stop. Fault relay output terminal MA-MC turns ON, and MB-MC turns
OFF.
2 : Fast Stop (Use C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. Fault relay output terminal MA-MC
turns ON, and MB-MC turns OFF.
3 : Alarm Only
The keypad shows oH and the drive continues operation. 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. oH flashes
on the keypad.
oH flashes on the keypad. When the alarm is output, the drive decelerates each 10 seconds. If the drive decelerates 10
times and the alarm continues to be output, the output terminal set for oH Pre-Alarm Reduction Limit [H2-01 to H2-
03 = 4D] activates. When the alarm is not output during deceleration, the drive accelerates until it is at the frequency
reference that was applicable before the alarm was turned off.
drive operation at a decreased output frequency.
Figure 2.142 Drive Operation at a Decreased Output Frequency when the Overheat Alarm is Output
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L8-05: Input Phase Loss Protection Sel
No.
Name
(Hex.)
L8-05 Input Phase Loss Protection
Sel
(04B1)
0 : Disabled
1 : Enabled
The drive measures ripples in DC bus voltage to detect input phase loss.
The drive detects phase loss when power supply phase loss occurs or the main circuit capacitor becomes unusable,
which causes PF [Input Phase Loss] to show on the keypad.
Disable the detection of the input power supply phase loss function in these conditions:
• During deceleration
• The run command is not input
• The output current is less than 30% of the drive rated current.
476
V/f CL-V/f OLV CLV AOLV
Sets the function to enable and disable input phase loss detection.
Figure 2.142 shows the output of the alarm and the
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
1
(0, 1)