F7490 fault in siemens sinamics V90 drive indicates the Enable signal was withdrawn while traversing. This means the drive lost its run permit or safety enable signal while the motor was actively moving.
Cause:
- For a standard assignment, another fault may have occurred as a result of withdrawing the enable signals.
- The drive is in the “switching on inhibited” state (for a standard assignment).
Remedy:
- Set the enable signals or check the cause of the fault that first occurred and then result (for a standard assignment).
- Check the assignment to enable the basic positioning function.
