Yaskawa AC Drive Z1000 Bypass Technical Manual - Manual (Page 174)

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 ( Refer to b3: Speed Search on
page 122 for details).
Note: 1. The wiring sequence should remove the Forward/Reverse command when a fault is triggered and output is shut off.
2. When the Forward/Reverse command is removed, the drive can perform a self-diagnostic check and attempt to restart the fault
automatically.
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.
Fault Name
GF Ground Fault
LF Output Open Phase
oC Overcurrent
oH1 Drive Overheat
oL1 Motor Overload
oL2 Drive Overload
oL3 Overtorque 1
oL4 Overtorque 2
Fault Name
ov DC Bus Overvoltage
PF Input Phase Loss
rH Braking Resistor Fault
rr Braking Transistor Fault
Uv1 DC Bus Undervoltage <1>
STo Pull-Out Detection
<1> When L2-01 is set to 0 through 2 (continue operation during momentary power loss).
Use parameters L5-01 to L5-05 to set up automatic fault restart.
Set H2-01, H2-02, or H2-03 to 1E. to output a signal during fault restart
<1> .
<1> Details on this function can be found in the standard Z1000 Programming Manual (SIEPC71061645) at
www.yaskawa.com.
n L5-01: Number of Auto Restart Attempts
Sets the number of times that the drive may attempt to restart itself.
Parameter L5-05 determines the method of incrementing the restart counter. When the counter reaches the number set to L5-01,
the operation stops and the fault must be manually cleared and reset.
The restart counter is incremented at each restart attempt, regardless of whether the attempt was successful. When the counter
reaches the number set to L5-01, the operation stops and the fault must be manually cleared and reset.
The number of fault restarts is reset to zero when:
• The drive operates normally for 10 minutes following a fault restart.
• A fault is cleared manually after protective functions are triggered.
• The power supply is cycled.
No. Name Setting Range Default
L5-01 Number of Auto Restart Attempts 0 to 10 Times 0 Times
n L5-02: Auto Restart Fault Output Operation Selection
Determines if a fault output is triggered (H2-oo = E) when the drive attempts to restart.
No. Name Setting Range Default
L5-02 Auto Restart Fault Output Operation Selection 0, 1 0
5.9 L: Protection Functions
174 YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual