Compiling The F-Program; Password Protection For Safety-Related Functions And Settings - Siemens SIMATIC PCS 7 Operating Manual

7.8

Compiling the F-program

If an S7 program contains charts with F blocks, these will be compiled when the CFC charts
are compiled. Measures for eliminating errors will also be expanded and additional safety-
relevant checks carried out.
7.8.1

Password protection for safety-related functions and settings

A password protects the fail-safe program and the parameters of the F-modules against
unauthorized changes. The password is requested when you attempt to access fail-safe
parts of the system, for example, when opening a fail-safe CFC, when compiling changes in
the safety program, or when opening the properties of a fail-safe module of the runtime
editor from a standard CFC.
If the password is entered, it remains valid for one hour. If you have finished your work, reset
the password's period of validity.
To do this, in the SIMATIC Manager select the CPU that contains the safety program and
use the "Options > Edit Safety Program" menu command to open the relevant dialog.
There you can find the "Password" button that opens the "Create Password for Safety
Program" window. The "Clear" button sets the validity period to "0".
You also have the option of changing the password.
If a standard user program and a fail-safe program are running in one CPU, changes to the
standard part can be compiled without the need to enter the F-password. This assumes that
no changes have been made to the safety program.
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB
Configuring the safety program
7.8 Compiling the F-program
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