Program Blocks - Siemens SIMATIC S7-300 Equipment Manual

3.3

Program blocks

Program blocks
For some communications services, there are preprogrammed program blocks (FCs / FBs)
available as the interface in your STEP 7 user program.
Please note the documentation of the program blocks in the online help of STEP 7 or in the
manual /10/ (Page 76).
Note
Current block versions
We recommend that you always use the latest block versions for all module types.
You will find information on the current block versions and the current blocks for download
on the Internet under:
Link: (https://support.industry.siemens.com/cs/ww/en/ps/15342/dl)
With older module types, this recommendation assumes that you are using the latest
firmware for the particular module type.
CP 343-1 Lean
Equipment Manual, 01/2023, C79000−G8976−C198−09
Requirements for use
3.3 Program blocks
27