Motor encoder moved beyond parameterized tolerance window during position tracking, causing loss of reference. The manual's first action is: “Reactivate the position tracking function (set p29243 = 1 -> 0 -> 1). Then the fault is acknowledged and, if necessary, adjust the encoder encoder (ABS).”
- Model
- Siemens SINAMICS V90, SIMOTICS S-1FL6
- Display shows
- F7448
- Type
- Fault code
- Source
- Manual p. 292
What F7448 means
Load gear: Position tracking actual position outside tolerance window p. 292
Common causes
- When switched off, the currently effective motor encoder was moved through a distance greater than was parameterized in the tolerance window. It is possible that there is no longer any reference between the mechanical system and encoder. Fault value (r0949, interpret decimal): Deviation (difference) to the last encoder position in increments of the absolute value after the measuring gear - if one is being used. The sign designates the traversing direction. Note: The deviation (difference) window is pre-assigned quarter of the encoder range. p. 292
What to do
- Reactivate the position tracking function (set p29243 = 1 -> 0 -> 1). Then the fault is acknowledged and, if necessary, adjust the encoder encoder (ABS). p. 292
Before you service the product, read the safety instructions in the manual p. 2.
If F7448 is still not resolved
- Contact service / dealer for assistance p. 2 “Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions.”
- Contact service / dealer for assistance p. 13 “NOTICE Property damage due to loose power connections Insufficient tightening torques or vibration can result in loose power connections. This can result in damage due to fire, device defects or malfunctions.”
This page summarises what the manufacturer’s manual says about F7448; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.