Programming F-Systems
7.3 Structure of the Safety Program in S7 Distributed Safety
Safety Engineering in SIMATIC S7
7-8
System Manual, 04/2006, A5E00109529-05
Block Container
... Contains F-Blocks for Function/F-Blocks
Block container containing the F-system blocks (F-
SBs) and F-shared DB that are automatically
inserted in the safety program
F-system blocks
The F-system blocks (F-SBs) are automatically
inserted by the
S7 Distributed Safety
optional
software when the safety program is compiled in
order to create an executable safety program from
the user's safety program.
The user must not insert F-system blocks from the
F-System Blocks
block container in an
F-PB/F-FB/F-FC. Likewise, the user must not
modify (rename) or delete the F-system blocks in
the
Distributed Safety
F-library (V1) or the block
container of the user project.
F-system blocks
F-shared DB
Fail-safe data block that contains all of the global
data of the safety program and additional
information needed by the F-system. The F-shared
DB is automatically inserted and expanded when
the safety program is compiled. The user can
evaluate certain data of the safety program in the
standard user program using the symbolic name of
the F-shared DB (F_GLOBDB).
See also
