Yaskawa iQpump Programming Manual - Manual (Page 105)

YASKAWA TM.iQp.02 iQpump Drive Programming Manual 105
◆ L5 Fault Restart
■ 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: 10.0 to 3600.0 sec
<0032>
Factory Default: 180.0 sec
All major faults will cause the iQpump drive to stop. For some faults it is possible to configure the iQpump drive to attempt a restart
automatically. After the fault occurs, the iQpump drive baseblocks for the Maximum Restart Time After Fault programmed in L5-03.
After the baseblock is removed the iQpump drive checks if a fault condition still exists. If no fault condition exists the iQpump drive will
attempt to restart the motor. If the restart is successful, the iQpump 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 iQpump 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 iQpump drive waits the Maximum Restart Time
After Fault (L5-03) before attempting another restart. This parameter is not applicable to Loss of Prime Fault.
Figure 1.90
Figure 95 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 iQpump drive must be without power long enough to let control power dissipate).
• The SHIFT/RESET key is pushed after the last reset attempt.
The setting of parameter L5-02 determines whether the fault output (MA-MB) will be closed during an auto restart attempt. The setting
of L5-02 can be important when interfacing the iQpump drive with other equipment.
The following faults will allow the Auto Restart function to initiate:
• OC (Overcurrent)
• LF (Output Open Phase)
• PF (Input Phase Loss)
• PUF (DC Bus Fuse)
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