In Auto mode, the front door safety switch is monitored.

• A. False
• B. True
• C. Only during maintenance
• D. Depends on mode

Answer: (B)

In automatic operation, guarding interlocks are actively checked to prevent starting or running with a door open. The front door safety switch feeds the safety circuit so the controller knows the door status. If the door is opened, the safety circuit trips and the machine stops; when the door is closed, normal control resumes. Because Auto mode relies on continuous protection from these devices, monitoring the front door safety switch is required. This makes the statement true. The other options would imply the monitoring isn’t always active in Auto, or that it only applies in maintenance or varies by mode, which doesn’t align with standard automatic-mode safety practice.