Siemens SINUMERIK 840D sl Function Manual page 354

Detailed Description
2.1 General functionality
Course of values
Course of values of system variables $VA_FXS[ ] with values 1 to 5
Figure 2-2
18
Diagram for FXS with a digital drive (611 digital)
Basic logic functions: Travel to fixed stop (F1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0