YASKAWA P7, User Manual, Page: 128 / 256

Programming 5 - 44
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L5 Fault Restart
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L5-01 Number of Auto Restart Attempts
Setting Range: 0 to 10
Factory Default: 0
"
L5-02 Auto Restart Operation Selection
"
L5-03 Maximum Restart Time After Fault
Setting Range: 0.5 to 600.0 Seconds
Factory Default: 180.0 Seconds
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 con-
tinuing fault condition, (i.e. an OV fault). The Drive waits L5-03 seconds before attempting another restart.
Fig. 37 Automatic Restart Timing Diagram
The auto restart count is reset back to 0 if any of the following occur:
• No further faults for ten minutes after the last retry.
• The Drives power is turned off (the Drive must be without power long enough to let control power dissipate).
• The SHIFT/RESET key is pushed after the last reset attempt.
Setting Description
0 No Flt Relay (factory default)
1 Flt Relay Active
t
t
t
t
Run
Fault
Attempts
Count
L2-03
OV
trying each
L5-03 seconds
successful
1
OC
L2-03
2
Voltage
remains high
for a long time,
then reset (1)
L2-03
3
OC
OC condition
gone, resets (3)
and runs.
successful
try but failed
Drive trips on OC,
resets (2) and tries
again but motor still
shorted, trips again.
TIME