Rockwell Automation Reliance SP500, Installation And Operation Manual

Page: 84 / 122

8-16
SP500 AC Drive Installation and Operation Manual Version 3.1
If F-26
≠
0, the drive logs and resets certain faults (called auto-restartable faults and
listed in table 8.2) it detects while running. The drive then waits the amount of time
specified in F-27 (Auto-Restart Retry Wait Time) and restarts the drive automatically.
While the drive counts down the auto-restart time period, the display flashes the
countdown period (in seconds) in the following format:
“Ar30 .. Ar29 .. Ar28 ...... Ar01 .. Ar00”
This shows the amount of time remaining before the auto-restart takes effect.
Once the drive restarts, it must run for 5 minutes in order to reset the number of fault
reset attempts to the value in F-26.
If the fault occurs again, the drive decrements the number of auto-restart attempts,
counts down the auto-restart time again, and continues the auto-restart process. If the
drive faults on all of these attempts, it remains in the faulted state and displays the
fault code for the fault it is trying to clear.
If the Stop/Reset input is asserted during the countdown, the auto-restart procedure is
cancelled and the fault is latched.
If a fault occurs that is auto-restartable and other faults are active that are not auto-
restartable, the auto-restart function will be disabled until all faults are cleared.
When F-26
≠
0, the drive logs the first occurrence of a fault in the fault log. Any
subsequent occurrence of that fault while attempting to restart the drive will not be
logged.
Table 8.2 lists the auto-restartable faults.
F-26 Auto-Restart Number of Attempts
This parameter selects
the number of times
the drive will attempt to
restart after certain
faults have shut down
the drive. Parameter Range:
Default Setting:
Step Size:
0 to 10
0
N/A
!
ATTENTION: If parameter F-26
≠
0, the drive will attempt to restart
automatically after auto-restartable drive faults (see table 8.2) have shut
down the drive. When this feature is enabled, the user must ensure that
automatic restart of the driven equipment will not cause injury to
operating personnel or damage to the driven equipment
Table 8.2 –
Auto-Restartable Fault
s
Fault Code Description
HU High bus voltage
LU Low bus voltage
OC Overcurrent
OH Thermostat/drive overload
OL Electronic thermal overload