Safety-Related Communication Between F-Cpus; Public Network Safety F-Cpu Communication Not Allowed - Siemens SIMATIC S7 F Manual

Safety Mechanisms
See Also
Interconnecting F-Driver Blocks and Driver Blocks for F-Signal Modules
3.9.4

Safety-Related Communication Between F-CPUs

Communication Options
S7 FH Systems
S7-400FH
Safety-related communication between CPUs takes place via configured standard or
fault-tolerant S7 connections.
Number Communication
From...
1 S7 FH Systems
2 S7 F/FH Systems
3 S7 F Systems
The fail-safe blocks F_SENDBO <-> and F_RCVBO or F_SENDR <-> F_RCVR are
available for safety-related communication between safety programs on different F-
CPUs. This means a fixed number of parameters of BOOLs or REALs can be safely
.
transferred
Safety Note – Public Network Safety F-CPU Communication Not Allowed
!
Safety-related communication between F-CPUs is not permissible via public
networks.
3-12
1
3
S7 F Systems
2
To
S7 FH Systems
S7 F Systems
S7 F Systems
S7 FH Systems
S7-400FH
2
S7 F Systems
Connection Type
S7 connection, fault-tolerant Yes
S7 connection, fault-tolerant Yes
S7 connection
Safety-
Related
Yes
Fail-Safe Systems
A5E00085588-03