Safely limited speed exceeded

What does C30714 mean?

The Safely Limited Speed (SLS) has been exceeded, meaning the motor is moving faster than the configured safe speed limit. This indicates a failure in speed monitoring or an incorrect speed setpoint from the higher-level control, posing a significant safety risk.

• Motor speed (r0021) exceeded the parameterized Safely Limited Speed (SLS) threshold (P30630).
• Incorrect setting of SLS threshold (P30630) or SLS ramp parameters (P30631, P30632).
• Failure of the speed monitoring function (e.g., encoder feedback issue, internal calculation error).
• External disturbance or load accelerating the motor beyond the safe limit (e.g., overhauling load).
• Encoder signal degradation or noise causing erroneous speed readings (e.g., cable shielding issues, loose connection at X45).

Click steps to track your progress.

1. 1

   Compare the actual motor speed (r0021) with the Safely Limited Speed threshold (P30630) using the drive's diagnostic display.

2. 2

   Verify the encoder feedback signal integrity (e.g., A/B/Z channels) using an oscilloscope at the drive's encoder input terminals (e.g., X45) to check for noise or loss.

3. 3

   Review and adjust the Safely Limited Speed threshold (P30630) and associated ramp parameters (P30631, P30632) to match machine requirements.

4. 4

   Check for external forces or loads (e.g., gravity, kinetic energy from coupled machinery) that could be driving the motor beyond the set limit.

5. 5

   Initiate a speed sensor calibration or offset adjustment (e.g., P0400) if encoder scaling or zero-speed detection is inaccurate.