What is a safety-rated monitored stop and how is it used in a robot cell?

• A. A safety-rated monitored stop that halts robot motion when a safety device is triggered, ensuring the robot remains in a safe state while the area is assessed.
• B. A stop that only reduces speed but keeps motion.
• C. A stop that resets robot to home position automatically.
• D. A stop that allows manual override by operator.

Answer: (A)

A safety-rated monitored stop is a safety function that instantly stops all robot motion when a safety device is triggered and keeps the robot in a safe, non-moving state until a deliberate, safety-approved restart is performed after the area has been checked and cleared. This guarantees that no unexpected movement occurs while someone verifies that the workspace is safe, and it requires a restart through safety-rated logic so the system cannot resume automatically. In a robot cell, this is used during hazardous events (like a gate opening or a light curtain being interrupted) to pause operations and preserve safety until the area is confirmed safe and a proper restart sequence is carried out. The other options describe behaviors that either continue motion, reset automatically, or allow easy override, which do not provide the verified stop-and-wait safety this function ensures.