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F Technology CPU 300/400 -- Operation and maintenance -- Technical data
What are the requirements for the proof test interval?
S7-300F/S7-400F: fail-safe input flickers
S7-400F: area for user blocks must be large enough
Password protection in fail-safe systems
Detailed analysis of STOP of the S7-400F/FH CPUs
Programming with F/FH systems -- Changing parameters on fail-safe I/Os
S7-400F: area for user blocks must be large enough
Part number:

QUESTION:
What can be the reason for the CPU going into STOP after transfer of the user program and reboot, although the program was compiled without errors?

ANSWER:
In the Properties of the CPU you must select a user area that is large enough for the functions and function blocks.
If, for example, it is only set to FC200, then FC301 (DB_RES) is not inserted automatically into the block folder after compilation of the CFC chart.
Since upon rebooting, this FC301 is required to initialize F-relevant instance data blocks, the CPU then goes into "STOP" state.
The dialog is in the CFC. Go to: "Tools > Settings > Compilation".

Remedy:
Select an area that is large enough for the user blocks!



Keywords:
System configuration, Download

 Entry ID:9612783   Date:2001-12-07 
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