Siemens SINUMERIK 840D sl Function Manual page 1587

2.6.5 Calibration with BERO
Function
For adjustment using BERO, a reference point approach to a defined machine position is
performed the same as for incremental measuring systems. In this case the BERO replaces
the encoder zero mark that the absolute encoder does not have. After successful completion
of reference point approach, the NC automatically calculates the reference point offset from
the difference between the encoder absolute value and the parameterized reference point
value.
Procedure
Proceed as follows for adjustment with BERO:
1. Set referencing mode to "Referencing with BERO":
2. Assign reference point value:
3. Start reference point approach.
Basic logic functions: Reference Point Approach (R1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
MD34200 $MA_ENC_REFP_MODE = 2
MD34100 $MA_REFP_SET_POS =
Reference point approach can be started manually in JOG-REF mode or in AUTOMATIC
or MDA mode from a part program (G74).
After a successful reference point approach, the absolute encoder is calibrated, the
actual value system of the machine axis is synchronized, and the machine axis is
referenced.
To identify this, the NC sets an interface signal for the measuring system that is currently
active:
DB31, ... DBB60.4 / 60.5 (referenced/synchronized 1 / 2) = 1
Note
If the BERO is removed after adjustment of the absolute encoder, the referencing mode
must be assigned to "Referencing with absolute encoder".
MD34200 $MA_ENC_REFP_MODE = 0
2.6 Referencing with absolute value encoders
Reference point value
Detailed description
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