Creating Cfc Charts; Assigning Parameters To And Interconnecting F-Blocks - Siemens SIMATIC PCS 7 Operating Manual

Configuring the safety program
7.2 Creating the safety program
7.2.2

Creating CFC charts

Inserting CFC charts
Individual CFC charts are added to the chart folder or plant hierarchy (PH) in the same way
as for standard user programs:
● In the chart container "Insert New Object > CFC" in the SIMATIC Manager
● Directly in the PH or process object view in the relevant hierarchy folder "Insert New
Object > CFC"
Inserting F blocks
Blocks are dragged from the "S7 F Systems Lib V1_3" library ("Failsafe Blocks (V1_2)" > "F-
User Blocks") and dropped into the chart. There is no limit on the number of times a block
can be dragged and dropped.
Note
If a block type has been dragged and dropped from the library before, the process can be
completed more quickly the next time by using the "CFC block catalog", "Blocks" tab.
7.2.3

Assigning parameters to and interconnecting F-blocks

F block inputs and outputs are parameterized and interconnected using the standard CFC
procedure.
Note
You are not permitted to interconnect EN/ENO connections of F blocks and F runtime
groups. You may not assign a value of 0 (FALSE) to EN I/Os either.
Special F data types in a safety data format are used for fail-safe block connections. The
safety data format enables data and address errors to be detected.
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB