Siemens SINUMERIK 840D sl Function Manual page 1155

Zero mark selection
If during the reference point approach of the axis or spindle several zero marks of the
measuring system are detected (e.g. measuring gear between the motor and encoder), then
the specific zero mark must be selected with an additional BERO signal.
● Connection
The BERO must be connected to a fast digital input on the NCU X122 or X132 interface.
● Activation
In order that the BERO signal is evaluated, the digital input to which the BERO is connected
must be selected in drive parameter p0493 for the axis/spindle.
Equivalent zero mark
If the used measuring system does not provide a zero mark signal, an equivalent zero mark
can be created via a BERO signal.
● Connection
The BERO must be connected to a fast digital input on the NCU X122 or X132 interface.
● Activation
In order that the BERO signal is evaluated, the digital input to which the BERO is connected
must be selected in drive parameter p0494 or p0495 for the axis/spindle.
Overview
Signal
Reference cam
Zero mark selection
External zero mark or equivalent
zero mark
References
● NCU interfaces: SINUMERIK 840D sl Manual, NCU7x0.3 PN,
Section "Connecting" > "Digital I/Os"
● Drive parameters: SINAMICS S120/S150 List Manual
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
15.5 Referencing with incremental measurement systems
Connection: Dig. input via
Ext. PLC I/O module or NCU:
X142
NCU: X122 or X132
NCU: X122 or X132
R1: Referencing
Set
PLC user program:
DB31, ... DBX12.7
Drive parameter: p0493
Drive parameter: p0494 or p0495
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