Multi-step Speed Reference 0 Conflicts with Jump Frequency

What does 085 mean?

This warning indicates that Multi-step speed reference 0 (A020) or the output frequency (F001) is set to a value that falls within one of the defined 'jump frequencies' (A063/A065/A067) with its associated width (A064/A066/A068). Operating at such a speed can lead to mechanical resonance in the machine, causing vibration or instability.

• A020 (Multi-step Speed Ref 0) was configured to a frequency value that falls within a defined jump frequency band (e.g., A063 ± A064).
• Jump frequency parameters (A063-A068) were configured such that one of the bands unintentionally overlaps with A020.
• The intended operating frequency for A020 is within a range that needs to be avoided due to mechanical resonance in the system.

Click steps to track your progress.

1. 1

   Access parameter A020 (Multi-step Speed Reference 0) and the jump frequency parameters A063 (Jump Freq 1), A064 (Jump Freq 1 Width), A065 (Jump Freq 2), A066 (Jump Freq 2 Width), A067 (Jump Freq 3), A068 (Jump Freq 3 Width).

2. 2

   Calculate the exact jump frequency bands (e.g., A063 minus A064 divided by 2 to A063 plus A064 divided by 2).

3. 3

   Adjust A020 (Multi-step Speed Reference 0) to a value that falls outside of all defined jump frequency bands.

4. 4

   Alternatively, if A020 cannot be changed, redefine the jump frequency parameters (A063-A068) to ensure their bands do not overlap with A020.

5. 5

   Save the parameter changes and power cycle the drive to confirm the settings are active.

6. 6

   Operate the drive using Multi-step Speed Reference 0 and monitor the output frequency (F001) to confirm it is no longer within a jump frequency band.