Siemens SIMATIC S7 F Manual page 33

Product Overview
9. Press the New Version... Button to import.
10. Recompile the program.
Important Note
You must Import the new Block Type after upgrading the library to insure all blocks
are up to date. Failure to Import new block types may result in a failed compile.
Important Note
Unplaced F-Blocks from the block container are automatically deleted when the
safety program is compiled.
Important Note
Run-time groups containing F-Blocks in task OB1 must be moved to OB3x
because OB1 is no longer supported.
Fail-Safe Systems
A5E00085588-03
1-17