Data Exchange Between The F User Program And Standard User Program - Siemens SIMATIC PCS 7 Operating Manual

Configuring the safety program
7.2 Creating the safety program
7.2.7

Data exchange between the F user program and standard user program

The standard program and the F-program use different data formats. Accordingly, special
conversion blocks have to be used for data exchange.
Converting F-data types to standard data types
If you need the standard user program to process data from the F-program further (for
monitoring on the PCS 7 OS, for example), a block for F_FDatatype_Datatype data
conversion will have to be interconnected in the user program so that the F-data types can
be converted into standard data types. This converter blocks must be called in the standard
user program (standard runtime group).
Extract from a process tag chart; converting the "QBAD" signal from F_BOOL to BOOL:
Note
The figure is available in its original size as appendix to the manual in the ZIP download of
the checklists.
Standard and F-blocks are in different runtime groups.
As shown here, some F-blocks have outputs (depicted in gray), which can be directly
interconnected with standard PCS 7 blocks.
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB