Security > "S7 Communication - Siemens SIMATIC S7-400 Operating Instructions Manual

Configuration and operation
4.8 Configuration of the CP in STEP 7 Professional
Certificate validation
For information on the certificate validation, refer to the relevant table of the OPC UA server
above.
Note
Special features for the client application
The value of the parameter "CheckServerCertificate" that you programmed in the connection
information (UASessionConnectInfo) for the client program block "UA_Connect" is
overwritten by the settings configured here for the certificate check.
If the client is to check the certificates of the communications partner (server), you can
ignore the parameter in the UDT "UASessionConnectInfo". For the certificate check only the
settings made here are relevant.
"Use symbols"
With the consistency check of STEP 7, you can recognize whether or not you have reached
the maximum permitted number of symbols.
4.8.11 Security > "S7 communication"
S7 communication
Here you make the settings for S7 communication via the CP and for protecting LAN access
to the pages of the S7 special diagnostics.
● Disable S7 communication
If the option is enabled, S7 communication via the CP is blocked.
Note
No loading if S7 communication is disabled
If S7 communication is disabled, you can no longer load the station via the CP.
● Disable diagnostics via LAN
If the option is enabled, access via LAN to the diagnostics pages of the S7 special
diagnostics is blocked.
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Operating Instructions, 01/2017, C79000-G8976-C427-02
CP 443-1 OPC UA