Siemens sinumerik 840D sl Function Manual page 169

The NCK sets the following as a confirmation in the axis block of axis 1:
DB31, ... DBB101:
The PLC user program sets the following for the axis data block of axis 3:
DB31, ... DBX29.4 = 0
The NCK sets the following as a confirmation in the axis block of axis 3:
DB31, ... DBB101:
Special functions: Gantry Axes (G1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
4.2 Setting of NCK PLC interface
Example
37