Industrial Engineer · phase 14 of 16 · noun
Auto Restart
Configured function that attempts to resume operation after selected faults and must be evaluated for machine safety.
The Explain card
- Plain English
- Auto restart is a setting that lets the drive reset itself after certain faults and try to run again, a set number of times with a set delay. It is meant for remote fans and pumps that nobody is watching.
- Example
- A pump drive trips on undervoltage during a storm. Auto restart waits ten seconds, resets, and the pump is running again before anyone knew it stopped.
- Why it matters
- A drive that restarts on its own is a motor that starts with nobody near the start button. On any machine an operator can reach, auto restart is a hazard, and it must be evaluated against the machine's safety assessment before it is enabled.
- Hook
- The motor may start itself, and someone should have decided that.
Word knowledge
How the word is built, where it came from, and what it sits beside in memory.
In a sentence
During VFD commissioning, the technician disables Auto Restart before testing the motor overload input and verifying the drive's fault-reset wiring.
Why these words
- Auto Greek autos, self modifies Restart to indicate action performed automatically
- Restart English re-, again, plus start, begin names a new start following an interruption
Where it came from
- Origin
- English technical compound formed from auto, shortened from automatic, and restart
- Entered the language
- 20th century
- What changed
- Auto developed from a self-related prefix into shorthand for automatic operation, while restart narrowed in controls usage to a programmed operating event.
How it is spelled
- Pattern
- restart is written as a closed compound with the prefix re-
- Pattern
- auto functions as a separate attributive word in the phrase
Spelled like
- reset
- reconnect
- auto reset
- auto tuning
Broken into chunks
-
auto
- automatic
- automation
-
re
- reset
- reconnect
-
start
- starter
- startup
What it sits beside
Same subject
- fault reset
- restart delay
- flying start
- motor overload
Same shape
- auto reset
- auto tuning
- auto acknowledgment
VFD recovery settings
- Auto Restart
- restart delay
- flying start
Where it sits in the deck
Phase 14: VFD Safety, Faults, and Diagnostics
What a drive does when it trips, what the fault codes are telling you, and how safe torque off stops the motor without killing the panel.
