Safety-Related Communication - Siemens SIMATIC S7 F Manual

Safety Mechanisms
3.9

Safety-Related Communication

Communication Overview
The following figure shows the communication options available to an F-system:
F-CPU F-CPU
Standard Standard program
F-Programm Safety Program
F-run-time group
F-run-time group F-Ablaufgruppe
Number
1
2
3
4
5
6
Fail-Safe Systems
A5E00085588-03
1 1 2 2
F-Ablaufgruppe
3 3
F driver F-Treiber
4 4
F-I/O F-SM
Communication Between
Safety Program in F-CPU
Standard program
F-run-time group (RTG)
Safety Program in F-CPU
Safety Program in F-CPU
Standard program in standard
or F-CPU
Standard or F-CPU
Standard program
6 6
F-CPU F-CPU
F-Programm Safety Program
5 5
Legend:
Safety-related
Non-safety-related
And Safety-Related
Standard program No
Safety Program No
F-run-time group (RTG) Yes
F-I/O Yes
Safety Program in F- Yes
CPU
Standard program in No
standard or F-CPU
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