# ID 70400

Axis lost its reference.
Description | With active reference monitoring, the bitwise AND-conjunction of the input data configured with P-AXIS-00426 and the checkmask set up with P-AXIS-00425 results in the value zero. This means the axis has lost its reference see [FCT-M1].
Response | Class | 7 | Error message output, stop of axis.
Solution | Class | 6 | Remove cause for reference loss and reference axis again. Possible reasons are:

- Reference loss caused by a change of drive parameters during drive start-up.→ Re-home axis after completion of parameterisation.
- Undervoltage of the buffer battery for absolute encoders with battery buffering.→ Replace battery.
- The encoder limit frequency of the encoder used by the drive was exceeded.→ Reduce axis velocity.

Parameter | %1: | Logical axis number [-]
%2: | Error value [-]
Value of the reference signal supplied by the drive (value of the input process date set in P-AXIS-00426).
%3: | Current value [-]
Checkmask calculated from P-AXIS-00425 .
Error type | -