YASKAWA FSDrive-MV1000 Parameter Manual page 219

Figure 2.80
Output frequency
f
ref
f × (L8-19)
ref
f × (L8-19)
ref
f × (L8-19)
ref
f × (L8-19)
ref
oH alarm number
Contact ouput (4D)
L8-19: Frequency Diminution Rate During Overheat Pre-Alarm
n
Specifies how much the output frequency is reduced when L8-03 is set to 4 and an overheat pre-alarm is triggered. Set as
a factor for the maximum output frequency.
No.
Frequency Reduction Rate during Overheat
L8-19
L8-07: Output Phase Loss Protection Selection
n
Enables or disables the output phase loss detection, which is triggered when the output current falls below 5% of the
drive rated current.
Note: 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.
No.
L8-07 Output Phase Loss Protection Selection
Setting 0: Disabled
Setting 1: Fault when one phase is lost
An output phase loss fault (LF) is triggered when one output phase is lost. The output shuts off and the motor coasts to a
stop.
Setting 2: Fault when two or more phases are lost
An output phase loss fault (LF) is triggered when two or more output phases are lost. The output shuts off and the motor
coasts to a stop.
L8-09: Output Ground Fault Detection Selection
n
Enables or disables the output ground fault detection.
No.
L8-09 Output Ground Fault Detection Selection
Setting 0: Disabled
Ground faults are not detected.
Setting 1: Enabled
A ground fault (GF) is triggered when high leakage current or a ground short circuit occurs in one or two output phases.
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
10 s
10 s
oH
Alarm
oH
Alarm
2
3
4
Figure 2.80 Output Frequency Reduction during IGBT Overheat Pre-Alarm
Name
Pre-Alarm
Name
Name
10 s 10 s 10 s
Reset oH
Alarm Reset oH
oH
Alarm
Setting Range
0.1 to 0.9
Setting Range
0 to 2
Setting Range
0, 1
2.8 L: Protection Functions
10 s 10 s
Alarm
etc. oH
Alarm
common_TMonly
0.8
2
1
time
ON (closed)
Default
Default
Default
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