Communication Via S7 Connections - Siemens SIMATIC PCS 7 System Manual

Supplementary information

16.9 Communication via S7 connections

16.9 Communication via S7 connections
Communication with standard systems
There is no fault-tolerant communication between a fault-tolerant system and a standard
CPU. The following examples illustrate the actual availability of the communicating systems.
Configuration
S7 connections are configured in STEP 7.
Programming
If S7 communication is used on a fault-tolerant system, all communication functions can be
used for this.
The communication SFBs are used in STEP 7 to program communication.
Note
The START and STOP communication functions act on exactly one CPU or on all CPUs of
the fault-tolerant system. More detailed information is available in Reference Manual
Software for S7-300/400 System and Standard Functions
Note
Downloading the connection configuration during operation
If you download a connection configuration during operation, established connections may
be terminated.
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CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB
System