Which statement best describes the relationship between a fault and the need to reset?

• A. A fault never requires a reset.
• B. Both faults and warnings always require restart.
• C. A fault typically stops motion and requires a reset, while a warning may not.
• D. Warnings always require a complete rebuild of the program.

Answer: (C)

In robot control, faults are safety-critical conditions that halt motion to protect people and equipment. When a fault occurs, you must clear it with a reset after investigating and addressing the cause, so the system can be rearmed and moved again. Warnings, on the other hand, are advisory notices that don’t necessarily block operation; you can often continue working after acknowledging them, though they may call for attention or specific actions. So the statement that a fault typically stops motion and requires a reset, while a warning may not, best captures this practical distinction. The other options conflict with how safety faults are handled, or mischaracterize warnings as always requiring restart or program rebuild.