L5: Fault Restart - YASKAWA A1000 HHP Programming Manual

1.8 L: Protection Functions
n L4-05: Frequency Reference Loss Detection Selection
The drive can detect a loss of an analog frequency reference from input A1, A2, or A3. Frequency reference loss is detected
when the frequency reference drops below 10% of the reference or below 5% of the maximum output frequency within 400
ms. Restoring the analog frequency reference to the L4-06 value or higher before loss occurs will clear the frequency reference
loss status.
Set H2-01, H2-02, or H2-03 to C for a digital output to trigger when frequency reference loss occurs.
Frequency Reference Loss on page 109
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No.
L4-05
Setting 0: Operate following the frequency reference
Setting 1: Continue operation with reduced frequency reference
The drive will continue operation at the frequency reference value set to parameter L4-06. When the external frequency
reference value is restored, the operation is continued with the frequency reference.
n
L4-06: Frequency Reference at Reference Loss
Sets the frequency reference level at which the drive runs when L4-05 = 1 and when detecting a reference loss. The value is
set as a percentage of the frequency reference before the loss was detected.
No.
L4-06
n L4-07: Speed Agree Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
No.
L4-07
Setting 0: No Detection during baseblock
Setting 1: Detection always enabled
u

L5: Fault Restart

After a fault has occurred, Fault Restart attempts to automatically restart the motor and continue operation instead of stopping.
The drive can perform a self-diagnostic check and resume the operation after a fault has occurred. If the self-check is successful
and the cause of the fault has disappeared, the drive restarts by first performing Speed Search
page 27 for details).
WARNING! Sudden Movement Hazard. Do not use the fault restart function in lifting applications. Fault restart may cause the machine to
drop the load, which could result in death or serious injury.
The drive can attempt to restart itself following the faults listed below.
146
Analog
frequency
reference
400 ms
Loss of
OFF
Reference
output
Figure 1.100 Loss of Reference Function
for details on setting the output function.
Name
Frequency Reference Loss Detection Selection
Name
Frequency Reference at Reference Loss
Name
Speed Agree Detection Selection
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Ratio of analog
frequency reference
before loss
100%
L4-06 (%)
10%
ON
time
Setting Range
Setting Range
Setting Range
Refer to Setting C:
0, 1
0.0 to 100.0%
0, 1
(Refer to b3: Speed Search on
Default
0
Default
80.0%
Default
0