Siemens SINUMERIK 840D sl Configuration Manual page 23

Note
This setting cannot be undone
Please note that once set, the DP address of an NX cannot be subsequently changed.
The NX modules must be connected to the DRIVE-CLiQ socket of the NCU in the real
wiring that corresponds to the permanently assigned DP address.
If you have incorrectly set the DP address of an NX, delete this NX from the project and
add a new one.
The DP address of the NX module is specified in accordance with your setting and the
appropriate I/O addresses of the telegrams are set automatically.
Note
Default I/O addresses of the telegrams
Depending on the set DP address, the appropriate I/O addresses of the telegrams are set
automatically.
Change this setting only when the I/O addresses of your telegrams differ from the default
setting!
You can also find information on the wiring between NCU and NX in the properties of the
DP Integrated interface on the NCU and NX under "PROFIBUS address".
Result
The NX module has been inserted into the project and connected to an NCU.
SINUMERIK STEP 7 Toolbox V14 SP1
Configuration Manual, 05/2017, A5E41846325
Configuring the NCU
2.2 Insert NX module
23