Programming
Fail-Safe Systems
A5E00085588-03
5-11
5.3.2 Automatically Inserted F-Blocks
When a CFC chart with fail-safe blocks is compiled, the following F-Control blocks
are inserted automatically in the Safety Program:
• F_SHUTDN
• DB_INIT
• RTG_LOGIC
• FAIL_MSG (part of RTG_LOGIC block type)
• DB_RES
• F_CYC_CO
• F_PLK
• F_PLK_O
• F_TEST
• F_TESTC
• F_TESTM
The following F module drivers can be inserted automatically (through generate
module drivers) or manually:
• F_M_DI24
• F_M_DI8
• F_M_AI6
• F_M_DO8
• F_M_DO10
!
Safety Note – Do not change automatically inserted F-Control Blocks.
The automatically inserted F-Control Blocks are visible after compilation. You must
not delete or change these blocks in any way. This may result in errors at the next
compilation.
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