F7420 fault in Siemens V70 Drive indicates Drive: Current setpoint filter natural frequency > Shannon frequency. This means the configured filter frequency is too high for the drive’s sampling rate and must be reduced.
Cause: One of the filter natural frequencies is greater than the Shannon frequency (2KHz).
Filter 1 (p1658, p1660)
Filter 2 (p1663, p1665)
Filter 3 (p1668, p1670)
Filter 4 (p1673, p1675)
Remedy:
- Reduce the numerator or denominator natural frequency of the current setpoint filter involved at the control system side.
- Switch out the filter involved (p1656).
