Siemens SIMATIC ET 200AL, System Manual

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Communications services
3.6 Secure Communication
Communication
76
Function Manual, 05/2021, A5E03735815-AJ
To set up a secure TCP connection to a TLS client, follow these steps:
1.
Create a global data block in the project tree.
2. Define a tag of the data type TCON_QDN_SEC in the global data block.
The example below shows the global data block "Data_block_1" in which the tag
"DNS ConnectionSEC" of the data type TCON_FDL_SEC is defined.
Figure 3-21 TCON_QDN_SEC_Server
3. Set the connection parameters of the TCP connection in the "Start value" column. Enter, for
example, the local ID of the TCP connection for "ID".