YASKAWA Z1000 User Manual page 177

Output frequency
f
ref
f × (L8-19)
ref
f × (L8-19)
2
ref
f × (L8-19)
3
ref
f × (L8-19)
4
ref
oH alarm number
Digital output (4D)
n L8-05: Input Phase Loss Protection Selection
Enables or disables the input phase loss detection.
No.
L8-05
Setting 0: Disabled
Setting 1: Enabled
Enables input phase loss detection. Since measuring the DC bus ripple detects input phase loss, a power supply voltage
imbalance or main circuit capacitor deterioration may also trigger a phase loss fault (PF).
Detection is disabled if:
• The drive is decelerating.
• No Run command is active.
• Output current is less than or equal to 30% of the drive rated current.
n L8-06: Input Phase Loss Detection Level
Sets the Input Phase Loss Detection (PF) Level.
Triggers PF fault when there is an imbalance larger than the value set to L8-06 in the drive input power voltage.
Detection Level = 100% = Voltage Class ×
No.
L8-06
n L8-07: Output Phase Loss Protection Selection
Enables or disables the output phase loss detection.
Note: 1. Output phase loss detection can mistakenly be triggered if the motor rated current is very small compared to the drive rating. Disable
this parameter in such cases.
2. Output phase loss detection is not possible when the drive is running a PM motor with light load.
No.
L8-07
YASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual
10 s 10 s
10 s
oH
Alarm
oH
Alarm
oH
Alarm
Figure 4.36 Output Frequency Reduction During Overheat Alarm
Name
Input Phase Loss Protection Selection
Name
Input Phase Loss Detection Level
Name
Output Phase Loss Protection Selection
4.13 Advanced Drive Setup Adjustments
10 s 10 s 10 s
Reset oH
Alarm Reset oH
Alarm
10 s
oH
etc.
Alarm
time
Setting Range
0, 1
Setting Range
Determined by
0.0 to 50.0%
Setting Range
0 to 2
Default
1
4
Default
o2-04
Default
1
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