Siemens SIMATIC S7 FH User Manual

Programming
Fail-Safe Systems
A5E00085588-03
5-43
5.4.4 Compiling a Safety Program
There are two compilation options:
• Compile all the CFC charts as a program. The charts are converted into
machine code that you can download to the CPU and run there.
• Compile a chart as a block type in order to use it again.
Note
Use hierarchical CFC charts or create new block types to use existing charts
repeatedly.
At compilation of the Safety Program, the password for the safety program is
requested when changes are detected in fail-safe blocks.
Unplaced F-Blocks from the block container are automatically deleted when the
safety program is compiled.
Password Protection During Compilation of the Safety Program
If changes to fail-safe blocks are detected at compilation, the password for the
safety program is requested.
• If the password entered is correct, the entire Safety Program is compiled or,
alternatively, only the changes. Authorization is valid for an hour after the
password has been entered.
• If authorization is not granted, the entire compilation is terminated with an error
message.
If no changes have to be made to the Safety Program section, compilation is
executed without a password request.

Siemens SIMATIC S7 FH Specifications

General

Brand	Siemens
Model	SIMATIC S7 FH
Category	Controller
Language	English