174 auto rstrt tries – Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty User Manual

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LiquiFlo 1.5 AC Drive, Software Reference Version 1.2

Important: The drive will re-start after a reset if the start input is still asserted.

Specifies the maximum number of times the drive attempts to reset a fault and restart
when the auto restart feature is enabled.

The auto restart feature provides the ability for the drive to automatically perform a
fault reset followed by a start attempt without user or application intervention. Only
certain faults are permitted to be reset, see chapter 12 for more information.

When the auto restart feature is enabled (that is, Auto Rstrt Tries is set to a value
greater than zero), and an auto-resettable fault occurs, the drive will stop. After the
number of seconds in Auto Restrt Delay (175) has elapsed, the drive will automatically
reset the faulted condition. The drive will then issue an internal start command to start
the drive.

If another auto-resettable fault occurs, the cycle will repeat up to the number of
attempts specified in Auto Rstrt Tries.

If the drive faults repeatedly for more than the number of attempts specified in Auto
Rstrt Tries with less than five minutes between each fault, the drive will remain in the
faulted state. The fault Auto Rstrt Tries will be logged in the fault queue.

The auto restart feature is disabled when the drive is stopping and during autotuning.
Note that a DC Hold state is considered stopping.

The following conditions will abort the reset/run process:

Issuing a stop command from any control source. (Note that removal of a 2-wire
run-fwd or run-rev command is considered a stop command.)

Issuing a fault reset command from any active source.

Removing the enable input signal.

174

Auto Rstrt Tries

Range:

0 to 9 [1]

Default:

0 (Disabled)

Access:

0

Path: Dynamic Control>Restart Modes

See also:

175

!

ATTENTION: Equipment damage and/or personal injury may result if
parameter 174 is used in an inappropriate application. Do not use this
function without considering applicable local, national, and international
codes, standards, regulations, or industry guidelines.

ATTENTION: The drive may start immediately after a fault is auto-reset
when LevelSense Start (168) is set to Enabled.

When LevelSense Start is enabled, the user must ensure that automatic
start up of the driven equipment will not cause injury to operating
personnel or damage to the driven equipment. In addition, the user is
responsible for providing suitable audible or visual alarms or other
devices to indicate that this function is enabled and the drive may start at
any moment. Failure to observe this precaution could result in severe
bodily injury or loss of life.

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