Siemens SINUMERIK 828D Commissioning Manual page 903

Figure 2-4
Checking the HMI time
You must correctly set the HMI time so that the secure OPC UA communication functions.
Note
The certificate needed for secure OPC UA communication (../siemens/sinumerik/hmi/miniweb/
System/Cert/servercerts/MiniWeb_OPCUA.crt) is automatically created during the first run-up.
The start date of the validity period is set to the current date. The validity period is 30 years.
If the time is subsequently changed so that it lies outside the validity period, the secure OPC
UA communication does not function (BadCertificateTimeInvalid).
Performing a restart
Perform a hardware restart on the target systems NCU and PPU. A restart of the
SINUMERIK Operate is necessary on the PCU 50.
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
Security message for opening the TCP port
Setting up OPC UA components
2.2 Setup
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