YASKAWA HV600 Manual page 384

2.9 L: Protection Functions
H2-xx = 4D:
L8-19:
Figure 2.107 Drive Operation at a Decreased Output Frequency when the Overheat Alarm is Output
*1 If the oH alarm continues after 10 reduction cycles, the terminal set for H2-xx = 4D [oH Pre-Alarm Reduction Limit] will activate.
Note:
• The drive will use the largest value of Y1-06 [Minimum Speed], Y4-12 [Thrust Frequency], or d2-02 [Frequency Reference Lower Limit] as
the lower limit for output frequency.
• Parameter L8-97 [Carrier Freq Reduce during OH] enables and disables the carrier frequency reduction during oH pre-alarm.
■
L8-05: Input Phase Loss Protection Sel
No.
Name
(Hex.)
L8-05 Input Phase Loss Protection
Sel
(04B1)
0 : Disable
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.
■
L8-07: Output Phase Loss Protection Sel
No.
Name
(Hex.)
L8-07 Output Phase Loss
Protection Sel
(04B3)
Note:
The drive can incorrectly start output phase loss detection in these conditions:
• The motor rated current is very small compared to the drive rating.
• The drive is operating a PM motor with a small load.
384
V/f OLV/PM EZOLV OLV/PM
Sets the function to enable and disable input phase loss detection.
V/f OLV/PM EZOLV OLV/PM
Sets the function to enable and disable output phase loss detection. The drive starts output phase loss
detection when the output current decreases to less than 5% of the drive rated current.
oH Alarm:
Description
Description
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
Default
(Range)
1
(0, 1)
Default
(Range)
1
(0 - 2)