Adjustment With Bero - Siemens SINUMERIK 840D sl Function Manual

15.9.5

Adjustment 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.
Parameterization
NC: Referencing mode
The referencing mode should be set to "Referencing of incremental, rotary or linear measuring
systems: Zero pulse on the encoder track":
MD34200 $MA_ENC_REFP_MODE[<axis>] = 1
NC: Reference point value
The reference point value is parameterized via:
MD34100 $MA_REFP_SET_POS[<axis>] = <reference point value>
Drive: Equivalent zero mark
The digital input on the NCU interface to which the BERO is connected must be set in
parameter p0494 or p0495.
Execution
Reference point approach can be started manually in JOG-REF mode or in AUTOMATIC or
MDA mode via a part program (G74).
After successful completion of the reference point approach, the absolute encoder is adjusted
and the actual-value system of the machine axis is synchronized.
As feedback for the PLC user program, the NC sets the NC/PLC interface signal for the
machine axis, depending on the active measuring system:
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 re-parameterized to "Referencing with absolute encoder".
MD34200 $MA_ENC_REFP_MODE[<axis>] = 0
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
15.9 Referencing with absolute encoders
R1: Referencing
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