Siemens SINUMERIK 840D sl Configuration Manual page 31

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".
SINUMERIK STEP 7 Toolbox V15.1
Configuration Manual, 12/2018, A5E46279635B AA
Configuring the NCU
3.2 Insert NX module
31