Rockwell Automation 1302 575v AC Drive - Canada Only - Manual (Page 76)

8–18 Programming
Publication 1302-5.0 — January, 1998
FĆ26 AutoĆRestart 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 FĆ26 ≠ 0, the Drive will attempt to restart automatically after
autoĆrestartable drive faults (see Table 8.B) have shut down the Drive. When this feature is
enabled, the you must ensure that automatic restart of the driven equipment will not cause
injury to operating personnel or damage to the driven equipment. This parameter may only be
used as outlined in NFPA79, paragraph 6-14 (exceptions 1-3) for specialized applications.
If FĆ26 ≠ 0, the Drive logs and resets certain faults (called autoĆrestartable faults and listed in table 8.2) it
detects while running. The Drive then waits the amount of time specified in FĆ27 (AutoĆRestart Retry Wait
Time) and restarts the Drive automatically.
While the Drive counts down the autoĆrestart 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 autoĆrestart 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 FĆ26.
If the fault occurs again, the Drive decrements the number of autoĆrestart attempts, counts down the
autoĆrestart time again, and continues the autoĆrestart 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 autoĆrestart procedure is cancelled and the
fault is latched.
If a fault occurs that is autoĆrestartable and other faults are active that are not autoĆrestartable, the
autoĆrestart function will be disabled until all faults are cleared.
When FĆ26 ≠ 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.B lists the autoĆrestartable faults.
Table 8.B - Auto-Restartable Faults
FaultCode Description
HU High bus voltage
LU Low bus voltage
OC Overcurrent
OH Thermostat/drive overload
OL Electronic thermal overload