Setting Of Nck Plc Interface; Commencing Start-Up - Siemens SINUMERIK 840D sl Function Manual

3.8.2

Setting of NCK PLC interface

Introduction
An automatic synchronization process during axis referencing must be disabled initially so as
to prevent any damage to grouping axes that are misaligned.
Disabling of automatic synchronization
The PLC user program sets the following for the axis data block of axis 1:
DB31, ... DBX29.4 = 0 (do not start gantry synchronization)
DB31, ... DBX29.5 = 1 (no automatic synchronization process)
The NCK sets the following as a confirmation in the axis block of axis 1:
DB31, ... DBB101.4 = 0 (synchronization process not ready to start)
DB31, ... DBB101.6 = 1 (leading axis LA)
DB31, ... DBB101.7 = 1 (gantry axis)
The PLC user program sets for the axis data block of axis 3:
DB31, ... DBX29.4 = 0 (do not start gantry synchronization)
The NCK sets the following as a confirmation in the axis block of axis 3:
DB31, ... DBB101.4 = 0 (synchronization process not ready to start)
DB31, ... DBB101.6 = 0 (synchronized axis GA)
DB31, ... DBB101.7 = 1 (gantry axis)
3.8.3

Commencing start-up

Referencing
The following steps must be taken:
● Select "REF" operating mode
● Start referencing for axis 1 (master axis)
● Wait until message "10654 Channel 1 Waiting for synchronization start" appears.
At this point in time, the NCK has prepared axis 1 for synchronization and registers this to the
interface signal:
DB31 DB31, ... DBB101.4 = 1 (synchronization process ready to start)
DB31, ... DBB101.6 = 1 (leading axis LA)
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
G1: Gantry axes
3.8 Examples
171