Zero Mark Selection With Bero - Siemens SINUMERIK 840D sl Function Manual

R1: Referencing
15.5 Referencing with incremental measurement systems
15.5.2

Zero mark selection with BERO

Function
Referencing of incremental measuring systems is based on the unique position of the encoder
zero mark relative to the overall traversing range of the machine axis. If because of machine-
specific conditions, several encoder zero marks are detected in the traversing range of the
machine axis (for examples, see figure below), a BERO must be mounted on the machine for
clear determination of the reference point. The position of the reference point is then derived
from the combination of BERO signal and encoder zero mark.
Figure 15-1
Parameterization
NC: Referencing mode
"Referencing of incremental, rotary or linear measuring systems: Zero pulse on the encoder
track" should be parameterized as referencing mode:
MD34200 $MA_ENC_REFP_MODE[<axis>] = 1
Drive: Zero mark selection
The digital input on the NCU interface to which the BERO is connected must be set in
parameter p0493.
Note
BERO signal: Zero mark selection
The processing of the BERO signal is performed exclusively in the drive. Connection and
parameterization, see Section "Hardware signals (Page 1154)".
1156
Measuring gear between the motor and encoder or reduction gear between the motor and
spindle
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions