L5: Automatic Fault Reset - YASKAWA L1000A Technical Manual

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L4-05: Speed Reference Loss Detection Selection
The drive can detect a loss of an analog speed reference from input A1and A2. Speed reference loss is detected when the
speed reference drops below 10% of the reference before or below 5% of the maximum output speed within 400 ms.
Figure 5.35
Parameter L4-05 selects the operation when a speed reference loss is detected.
No.
L4-05
Setting 0: Stop
Drive follows the speed reference (which is no longer present) and simply stops the motor.
Setting 1: Continue operation with reduced speed reference
The drive will continue operation at the speed reference value set in parameter L4-06. When the external speed reference
value is restored, the operation is continued with the speed reference.
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L4-06: Speed Reference at Reference Loss
Sets the speed 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 speed reference before the loss was detected.
No.
L4-06
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L4-13: Door Zone Level
Sets the speed level for the car door to open. Once the car slows to the speed set in L4-13, a multi-function output terminal
set for "Door zone reached" will close (H2-
No.
L4-13

◆ L5: Automatic Fault Reset

After a fault has occurred, Fault Restart attempts to automatically restart the motor and continue operation instead of
stopping. The inverter can reset faults automatically. The maximum number of resets can be selected as well as the
operation mode of the fault relay.
WARNING! Sudden Movement Hazard. Do not use the fault reset function in lifting applications. Fault reset may cause the machine to
drop the load, which could result in death or serious injury.
Faults Allowing for Automatic
The drive attempts to reset itself after one of the faults listed below has occurred. All other faults will need to be reset
externally.
Fault
GF
LF
oC
oH1
oL1
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Analog
speed
reference
400 ms
Figure 5.35 Loss of Reference Function
Name
Speed Reference Loss Detection Selection
Name
Speed Reference at Reference Loss
= 52).
Name
Door Zone Level
Reset
Name
Ground Fault
Output Phase Loss
Overcurrent
Heatsink Overheat
Motor Overload
5.8 L: Protection Functions
100%
10%
common_TMonly
Setting Range
0 or 1
Setting Range
0.0 to 100.0%
Setting Range
0.0 to 100.0%
Fault
ov
rr Braking Transistor Fault
UL3 Undertorque Detection 1
UL4 Undertorque Detection 2
SE1
Default
0
Default
80.0%
Default
0.0%
Name
DC Bus Overvoltage
Sequence Error 1
5
207