Siemens SIMATIC S7-300 Getting Started page 84

Programming
5.3 Editing the safety program
Step Activity
8 In the "Safety program" dialog box, click "Generate".
Note
Because the automatically created blocks have no fixed numbers, errors may occur during compilation of
the safety program. In this case, you need to check the addresses of the accesses to the F-I/O in the
function blocks of the program and adapt them if necessary.
Then compile the safety program again.
9 When compiling is completed without error, there is always a consistent safety program in the block
container, consisting of all F-blocks with an F-attribute.
The collective signature of all F-blocks with the F-attribute in the block container and the collective
signature of the safety program are identical (as highlighted in the picture). In other words, there is now a
consistent safety program ready for an acceptance procedure.
10 Click "Download" to load the safety program to the CPU.
A prompt appears offering you the option of downloading the standard user program along with the
safety program.
11 Confirm with "Yes".
Note: If you only download the F-blocks, the block in which the F-CALL block is called (cyclic interrupt
OB 35 in the example here) will not be loaded. You will then have to download the OB separately as in the
standard.
Note: You can only download the complete safety program only in STOP mode.
84
Result
The safety program is compiled and the
results will be displayed in a separate
window.
CPU 317TF-3PN/DP: Controlling a SINAMICS S120 with Safety Functions
Getting Started, 10/2013, A5E02982990-04