Siemens SINUMERIK 828D Commissioning Manual page 902

Setting up OPC UA components
2.2 Setup
Note
If you want to change the administrator password later, you can do this via the OPC UA method
"ChangeMyPassword".
Figure 2-3
Then choose "OK". If you enter a different port from the standard OPC UA TCP port (4840),
you will receive a safety note.
10
OPC UA configuration dialog (with corresponding changes)
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3