Programming
Fail-Safe Systems
A5E00085588-03
5-45
Procedure
1. Create the CFC chart in a separate S7 program assigned to an F-capable
CPU.
2. Open the chart you want.
3. Choose the Chart > Compile > Chart as Block menu command. A dialog box
for entering the block properties appears.
4. Enter the properties of the new block type. Select the options "Compile for PLC
- S7 400" and "Optimize Code for - Downloading Changes in RUN Mode" and
confirm with OK.
Result: A new block type is created that can be used in safety programs.
5. Insert the new block type in a Safety Program and test it there.
6. Accept the Safety Program of the new F-Block type.
Using a New Block Type in the Safety Program
If you use a fail-safe block of a newly created type, you must recompile the Safety
Program and download the whole program or the changes to the CPU.
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