Practice Test Geeks(FANUC) Fuji Automatic Numerical Control Robotics Certification Practice Test
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Safety Standards & Compliance in Robotics Flashcards

7 cards from real FANUC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Safety Standards & Compliance in Robotics flashcards as text

  1. Under NFPA 79 (Electrical Standard for Industrial Machinery), what color must the emergency stop actuator (push button) be on a FANUC robot control panel?

    Answer: Red with yellow background

    NFPA 79 requires the emergency stop actuator to be red with a yellow background to provide maximum visual contrast and immediate identification.

  2. Which safeguarding method defined in ISO 10218-2 uses robot force and power limiting to make physical contact with a human inherently safe?

    Answer: Power and force limiting (PFL)

    Power and Force Limiting (PFL) is the collaborative method where the robot's hardware or control system inherently limits contact forces to safe levels, allowing direct human contact.

  3. A FANUC robot's emergency stop circuit must be designed to which safety circuit category per IEC 60204-1 to achieve a safety-rated stop?

    Answer: Category 4 — redundant, self-monitoring with high diagnostic coverage

    E-stop circuits on industrial robots typically require IEC 60204-1 Category 4 safety relay architecture with dual-channel redundancy and high diagnostic coverage to achieve PLe/SIL 3.

  4. When a FANUC robot is operated in 'Automatic mode' with the safeguarding in place, what additional device is required before the robot can be restarted after a safety stop?

    Answer: A deliberate manual reset of the safety circuit is required

    After a safety stop in automatic mode, ANSI/RIA R15.06 and ISO 10218 require a deliberate manual reset action to prevent unintended automatic restart.

  5. In ISO 13849-1, what does 'CCF' (Common Cause Failure) refer to in the context of a FANUC dual-channel safety circuit?

    Answer: Failures in both channels caused by the same root cause, defeating the redundancy

    CCF is when a single cause (e.g., overvoltage, temperature, EMI) simultaneously fails both channels of a redundant safety system, eliminating the protection that redundancy is designed to provide.

  6. According to ANSI/RIA R15.06-2012, which personnel qualification is required before someone can perform maintenance inside a FANUC robot's safeguarded space?

    Answer: Qualified person trained in the specific robot system's hazards and lockout/tagout procedures

    ANSI/RIA R15.06 requires that personnel entering the safeguarded space be 'qualified persons' — specifically trained and authorized for the robot system's hazards and applicable energy control (LOTO) procedures.

  7. What is the key functional difference between a 'safety-rated monitored stop' and a 'protective stop' in ISO/TS 15066 collaborative robot applications?

    Answer: Safety-rated monitored stop cuts power; protective stop maintains power and position

    A safety-rated monitored stop (SRMS) removes drive power while monitoring that the robot has not moved; a protective stop (Category 2) keeps power applied and maintains position hold for quick restart.