FANUC Safety Standards & Compliance in Robotics 4

Question 1

What is the maximum allowable transient contact force per ISO/TS 15066 for the hand/finger area when a cobot makes unintended contact?

Accepted Answer

140 N

Answer

ISO/TS 15066 Annex A specifies a quasi-static force limit of 140 N for the hand/finger body region during unintended collaborative robot contact.

Question 2

In FANUC DCS, a 'Position Check' violation triggers which type of robot stop by default?

Accepted Answer

Category 0 (power removed immediately)

Answer

A DCS Position Check violation triggers a Category 0 stop — immediate removal of servo power — because it indicates the robot has exceeded its defined safe working envelope.

Question 3

Which body administers the RIA (Robotic Industries Association) standards that FANUC robots must comply with in the US?

Accepted Answer

A3 (Association for Advancing Automation)

Answer

RIA is now part of A3 (Association for Advancing Automation), which develops and administers the ANSI/RIA R15.06 standard for industrial robot safety in the US.

Question 4

When validating a safety-rated monitoring function on a FANUC robot, what must be verified per ISO 13849-1 to confirm the achieved Performance Level (PL)?

Accepted Answer

MTTFd, DCavg, CCF measures, and system architecture (category)

Answer

ISO 13849-1 PL validation requires calculating MTTFd (mean time to dangerous failure), DCavg (diagnostic coverage), applying CCF (common cause failure) measures, and verifying the architectural category.

Question 5

A FANUC robot cell uses a safety-rated door interlock. According to ANSI/RIA R15.06, what must happen before the safeguarding device can be muted to allow material transfer?

Accepted Answer

A muting function with defined time limits and additional safeguards must be in place

Answer

Muting (temporarily suspending) a safeguarding device is only permitted when a properly designed muting function with time/position limits and supplemental safeguards is implemented per ANSI/RIA R15.06.

(FANUC) Fuji Automatic Numerical Control Robotics Certification Practice Test

(FANUC) Fuji Automatic Numerical Control Robotics Certification Practice Test

FANUC Safety Standards & Compliance in Robotics 4