Open User Communication
6.11 Secure Open User Communication
Communication
100 Function Manual, 12/2017, A5E03735815-AF
4. Set the parameters for secure communication in the "Start value" column.
– "ActivateSecureConn": Activation of secure communication for this connection. If this
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.
– "TLSServerCertRef": Enter the value 2 (reference to the CA certificate of the
TIA Portal 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.
– "TLSClientCertRef": ID of the own X.509-V3 certificate.
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.
Settings at the TLS server
To set up a secure TCP connection in the TLS server, follow these steps:
1. Create a global data block in the project tree.
2. Define a tag of the data type TCON_IP_4_SEC in the global data block.
The example below shows the global data block "Data_block_1" in which the tag "SEC
connection 1 TLS-Server" of the data type TCON_IP_V4_SEC is defined.
Figure 6-20 IP_V4_SEC_Server
3. Set the connection parameters of the TCP connection in the "Start value" column. Enter
the IPv4 address of the TLS client, for example, for the "RemoteAddress".
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