Programming
Fail-Safe Systems
5-6 A5E00085588-03
Notes on Working With CFC
!
Safety Note – Compression Changes Signature
Compressing CFC programs changes the overall signature of the program!
If the program has to be compressed, carry out the compression before it is
accepted.
The fail-safe blocks in the Fail-safe Blocks library are highlighted in color in the
CFC chart. They are colored yellow to indicate that it is a safety program.
The CFC charts and run-time groups with F-Blocks are yellow and marked with an
"F" to differentiate them from the charts and run-time groups of the standard
program.
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