5.8 L: Protection Functions
290 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
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.
Refer to b3: Speed Search on page 160 for details.
DANGER! Never use the fault restart function in hoist-type applications.
The drive can attempt to restart itself following the faults listed below.
Use parameters L5-01 to L5-05 to set up automatic fault restart.
To output a signal during fault restart, set H2-01, H2-02, or H2-03 to 1E.
L5-01: Number of Auto Restart Attempts
Sets the number of times that the drive may attempt to restart itself.
The method of incrementing the restart counter is determined by
the setting of parameter L5-05. When the counter
reaches the number set in L5-01, the operation stops and the fault has to be reset manually after correcting the cause.
The restart counter is incremented at each restart attempt, re
gardless of whether the attempt was successful. When the
counter reaches the number set in L5-01, the operation stops and the fault has to be reset manually after correcting the
cause.
The number of fault restarts is reset back to zero when:
• The drive operates normally for ten minutes following a fault restart.
• A fault is cleared manually after
protective functions are triggered.
• The power supply is cycled.
L5-02: Auto Restart Fault Output Operation Selection
Determines if a fault output is triggered (H2- = E) when the drive attempts to restart.
Setting 0: No fault output
Setting 1: Fault output is set
L5-04: Fault Reset Interval Time
Determines the amount of time to wait between restart attempts when parameter L5-05 is set to 1.
Fault Name Fault Name
GF Ground Fault oL4 Overtorque 2
LF Output Open Phase ov DC Bus Overvoltage
oC Overcurrent PF Input Phase Loss
oH1 Drive Overheat rH Braking Resistor Fault
oL1 Motor Overload rr Braking Transistor Fault
oL2 Drive Overload Uv1
<1> When L2-01 is set to 1 through 4 (continue operation during momentary power loss)
DC Bus Undervoltage <1>
oL3 Overtorque 1
Sto
Pull-Out Detection
No. Name Setting Range Default
L5-01 Number of Auto Restart Attempts 0 to 10 Times 0 Time
No. Name Setting Range Default
L5-02 Auto Restart Fault Output Operation Selection 0 or 1 0
No. Name Setting Range Default
L5-04 Fault Reset Interval Time 0.5 to 600.0 s 10.0 s
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