Siemens SINUMERIK 840D sl Operating Manual page 474

Create MyConfig - Topo
6.4 Topo - operation
Figure 6-9 Local DO list - display of linked and unlinked DO variables
Note
DO variables are no longer needed in Expert
Packages can be deployed without requiring a DO list.
Preferably, use the DO variables from the topology file.
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SINUMERIK Integrate Create MyConfig - Diff, Expert, Topo
Operating Manual, 12/2017, A5E36537479B-AE