Allen-Bradley PowerFlex 70 Reference Manual page 39

The auto-reset/run feature provides 2 status bits in [Drive Status 2] – an active
status, and a countdown status.
210 [Drive Status 2]
Present operating condition of the drive.
x x 0 0 0 0
15 14 13 12 11 10
Bit #
The typical steps performed in an Auto-Reset/Run cycle are as follows:
1. The drive is running and an auto-resettable fault occurs, tripping the drive.
2. After the number of seconds in [Auto Rstrt Delay], the drive will
automatically perform an internal Fault Reset, resetting the faulted condition.
3. The drive will then issue an internal Start command to start the drive.
4. If another auto-resettable fault occurs the cycle will repeat itself up to the
number of attempts set in [Auto Rstrt Tries].
5. If the drive faults repeatedly for more than the number of attempts set in
[Auto Rstrt Tries] with less than five minutes between each fault, the
auto-reset/run is considered unsuccessful and the drive remains in the faulted
state.
6. Aborting an Auto-Reset/Run Cycle (see
for details).
7. If the drive remains running for five minutes or more since the last reset/run
without a fault, or is otherwise stopped or reset, the auto-reset/run is
considered successful. The entire process is reset to the beginning and will
repeat on the next fault.
Beginning an Auto-Reset/Run Cycle
The following conditions must be met when a fault occurs for the drive to begin
an auto-reset/run cycle.
• The fault must be defined as an auto-resettable fault
• [Auto Rstrt Tries] setting must be greater than zero.
• The drive must have been running, not jogging, not autotuning, and not
stopping, when the fault occurred. (Note that a DC Hold state is part of a
stop sequence and therefore is considered stopping.)
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
1 =Condition True
0 0 0 0 0 0 0 0 0 0
0 =Condition False
9 8 7 6 5 4 3 2 1 0
x =Reserved
* Vector firmware 3.001 & later
Aborting an Auto-Reset/Run Cycle
Auto Restart (Reset/Run)
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