F7481 fault in siemens sinamics V90 drive indicates the Axis position is less than the software limit switch minus. This means the actual position of the motor has physically drifted past the configured negative software limit.
Cause:
The actual position of the axis is less than the position of the software limit switch minus.
Remedy:
- Correct the target position.
- Change software limit switch minus (CI: p2580).
