5.8 L: Protection Functions
5
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SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
229
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, regardless 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
■
L5-03: Time to Continue Making Fault Restarts (enabled only when L5-05 = 0)
Although the drive will continue to execute fault restarts, this parameter will cause a fault if a fault restart cannot occur
after the time in L5-03 passes.
All major faults will cause the drive to stop. For some faults it is possible to configure the drive to attempt a restart
automatically. After the fault occurs, the drive baseblocks for L2-03 seconds. After the baseblock is removed the drive
checks if a fault condition still exists. If no fault condition exists the drive will attempt to restart the motor. If the restart is
successful, the drive performs a Speed Search (Regardless of the status of b3-01 “Speed Search Selection”) from the set
speed command and the Auto Restart Attempts count is increased by one. Even if the restart fails the restart count is
increased by one as long as the drive attempted to rotate the motor. The restart count will not be incremented if the restart
is not attempted due to a continuing fault condition, (i.e. an ov fault). The drive waits L5-03 seconds before attempting
another restart.
Fault
Name
Fault
Name
GF Ground
Fault
oL3 Overtorque
1
LF Output
Open
Phase
ov
DC Bus Overvoltage
oC Overcurrent
PF Input
Phase
Loss
oH1 Drive
Overheat
Uv1
<1> When L2-01 is set to 1 through 4 (continue operation during momentary power loss).
DC Bus Undervoltage
oL1 Motor
Overload
Sto
Pull-Out Detection
oL2 Drive
Overload
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
L5-03
Time to Continue Making Fault Restarts
0.0 to 600.0 s
180.0 s
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