What is the difference between a fault and a warning alarm?

• A. A fault typically stops motion and requires a reset, while a warning alerts but may not stop operation.
• B. A fault has no impact, while a warning stops motion.
• C. There is no difference between fault and warning.
• D. Warning alarms always require reset before continuing.

Answer: (A)

Alarm handling in FANUC robots distinguishes faults from warnings by how severe the condition is and what it forces you to do. A fault is a serious condition that stops motion and safety functions, so you can’t resume normal operation until you clear the fault and perform the appropriate reset. A warning is an advisory message that indicates something to check but doesn’t automatically block the cycle; you can often continue operating with caution, or with reduced performance, while you address the issue.

That’s why the best description is that a fault stops motion and requires a reset, while a warning alerts you but may not stop operation. The other statements don’t fit because they either claim faults have no impact, claim there’s no difference, or insist that all warnings always require a reset.