Rockwell Automation 1302 575v AC Drive - Canada Only User 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

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

High bus voltage

Low bus voltage

Overcurrent

Thermostat/drive overload

Electronic thermal overload