Monitoring Safe operating halt

What does F502 mean?

The DIAX04 SSE-03VRS drive's integrated safety function 'Safe Operating Halt' (SOH) is active and being monitored. This fault indicates that the SOH condition, which allows the motor to maintain torque at zero speed but prevents position changes, is being violated. A violation typically means the axis moved beyond an allowed standstill window while SOH was active.

• The motor or axis moved beyond its allowed standstill window while Safe Operating Halt (SOH) was active.
• Faulty encoder or feedback system providing incorrect position data to the safety function.
• Insufficient holding torque from the motor or brake, allowing creep or drift of the axis.
• Incorrect configuration of the Safe Operating Halt parameters or safety input signals (e.g., S-0-0007, S-0-0008) in the DIAX04 SSE-03VRS drive.
• External force or mechanical issue causing the axis to move when SOH should maintain position.

Click steps to track your progress.

1. 1

   Verify that the motor and machine axis maintain position within the allowed tolerance when Safe Operating Halt is active.

2. 2

   Inspect the motor encoder and its wiring for proper function and accurate position feedback to the DIAX04 SSE-03VRS drive.

3. 3

   Check the configuration of Safe Operating Halt parameters (e.g., S-0-0007, S-0-0008) and associated safety input signals in the DIAX04 SSE-03VRS for correctness.

4. 4

   Ensure the motor holding brake (if present) is functioning correctly and providing sufficient holding torque.

5. 5

   Monitor the actual motor position feedback via diagnostics to determine if unintended movement is present. If the fault persists, consider a fault with the DIAX04 SSE-03VRS drive's internal safety module.