Speed for SLS exceeded

What does A01692 mean?

The motor speed has exceeded the configured Safe Limited Speed (SLS) threshold, either upon entering SLS or exceeding its tolerance. This triggers a controlled deceleration (SS1), followed by a Safe Torque Off (STO) and a drive fault, indicating a potential safety violation due to excessive speed that could lead to injury or damage.

• Actual motor speed exceeding the configured Safe Limited Speed (SLS) limit (P0951 or similar parameter) when the SLS function is active.
• Incorrectly configured SLS speed threshold (P0951) that is lower than the actual process operating speed.
• Malfunctioning speed encoder or feedback system providing inaccurate speed measurement to the drive's safety function.
• Overshoot of motor speed during deceleration into SLS due to insufficient braking torque or excessively short ramp times (P1121).
• Internal safety function monitoring fault detecting an erroneous overspeed condition, even if the actual speed is within limits.

Click steps to track your progress.

1. 1

   1. Read the actual motor speed (r0063 or equivalent) and compare it to the configured SLS speed limit (P0951) when the SLS function is active.

2. 2

   2. Verify the configuration of the SLS speed threshold (P0951) and adjust it appropriately to allow for safe operation while respecting the limit.

3. 3

   3. Inspect the motor encoder connections (e.g., X104, X105 terminals) for damage or loose wiring, and verify encoder signal integrity using an oscilloscope.

4. 4

   4. Increase the deceleration ramp time (e.g., P1121) to allow for a smoother transition into the SLS speed range, preventing overshoot.

5. 5

   5. Check parameter P0952 (SLS tolerance window) and ensure it is adequately set to account for minor speed fluctuations without triggering the warning.