Siemens SIMATIC S7-1500 Function Manual page 101

Open User Communication
6.11 Secure Open User Communication
4. Set the parameters for secure communication in the "Start value" column.
– "ActivateSecureConn": Activation of secure communication for this connection. If this
– "TLSServerReqClientCert ": Request for an X.509-V3 certificate from the TLS client.
– "TLSServerCertRef": ID of the own X.509-V3 certificate.
– "TLSClientCertRef": Enter the value 2 (reference to the CA certificate of the TIA Portal
5. Create one of the instructions TSEND_C, TRCV_C or TCON in the program editor.
6. Interconnect the CONNECT parameter of one of the instructions TSEND_C, TRCV_C or
TCON with the tags of the data type TCON_IP_V4_SEC.
In the example below, the CONNECT parameter of the TSEND_C instruction is
interconnected with the "SEC connection 1 TLS client" tags (data type TCON_IP_4_SEC).
Figure 6-21
Additional information
You can find more information about the system data types TCON_IP_4_SEC in the STEP 7
online help.
For additional information on secure communication, refer to the section Secure
Communication (Page 34).
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parameter has the value FALSE, the subsequent security parameters are irrelevant.
You can set up a non-secure TCP or UDP connection in this case.
Enter the value "true".
project (SHA256) or the value 1 (reference to the CA certificate of the TIA Portal
project (SHA1)). If you use a different CA certificate, enter the corresponding ID from
the certificate manager of the global security settings.
TSEND_C
Function Manual, 11/2019, A5E03735815-AH
Communication