Siemens SIMATIC ET 200AL, System Manual

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Open User Communication
6.6 Setting up communication over FDL
Communication
Function Manual, 05/2021, A5E03735815-AJ
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Setting up an FDL connection in the user program
For communication via FDL, you need to create the data block of the TCON_FDL system data
type yourself in each case, assign parameters and call it directly at the instruction. Follow
these steps:
1.
Create a global data block in the project tree.
2. In the global data block, define a tag of the data type TCON_FDL.
The example below shows the global data block "FDL_connection" in which the tag
"FDL_connection" of the data type TCON_FDL is defined.
Figure 6-7 Programming an FDL connection
3. Program the parameters of the FDL connection (e.g. the PROFIBUS addresses) in the tag of
the data type TCON_FDL.
4. Create a TCON instruction in the program editor.
5. Interconnect the CONNECT parameter of the TCON instruction with the tag of the data type
TCON_FDL.
In the example below, the CONNECT parameter of the TCON instruction is interconnected
with the tag "FDL_Connection" (data type TCON_FDL).
Figure 6-8 Example: TCON Instruction for FDL connection