L5: Fault Restart - YASKAWA A1000 Series Technical Manual

Figure 5.100
To have a digital output trigger when frequency reference loss occurs, set H2-01, H2-02, or H2-03 to C.
C: Frequency reference loss on page 228
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No.
L4-05
Setting 0: Stop
Drive follows the frequency reference (which is no longer present) and simply stops the motor.
Setting 1: Continue operation with reduced frequency reference
The drive will continue operation at the frequency reference value set in parameter L4-06. When the external frequency
reference value is restored, the operation is continued with the frequency reference.
L4-06: Frequency Reference at Reference Loss
■
Sets the frequency reference level the drive runs with when L4-05 = 1 and a reference loss was detected. The value is set
as a percentage of the frequency reference before the loss was detected.
No.
L4-06
L4-07: Speed Agreement 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

◆ L5: Fault Restart

After a fault has occurred, this function attempts to automatically restart the motor and continue operation instead of
stopping.
The drive can be set up to 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
to b3: Speed Search on page 146
DANGER! Never use the fault restart function in hoist-type applications.
The drive can attempt to restart itself following the faults listed below.
Fault
GF
LF
oC
oH1
oL1
oL2
oL3
<1> When L2-01 is set to 1 through 4 (continue operation during momentary power loss)
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Analog
frequency
reference
400 ms
Loss of
Reference
OFF
output
Figure 5.100 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 Agreement Detection Selection
for details).
Name
Ground Fault
Output Open Phase
Overcurrent
Drive Overheat
Motor Overload
Drive Overload
Overtorque 1
100%
10%
ON
common_TMonly
time
Setting Range
Setting Range
0.0 to 100.0%
Setting Range
Fault
oL4
ov
PF
rH
rr
Uv1
Sto
5.8 L: Protection Functions
Refer to Setting
Default
0 or 1 0
Default
80.0%
Default
0 or 1 0
Name
Overtorque 2
DC Bus Overvoltage
Input Phase Loss
Braking Resistor Fault
Braking Transistor Fault
DC Bus Undervoltage
<1>
Pull-Out Detection
5
(Refer
263