Siemens SIMATIC S7-1500 System Manual page 155

Application planning
6.3 Configuration versions
Not recommended configuration variants
The following configuration variants are not recommended:
Configuration variant 1
The H-CPUs are each configured in a separate PROFINET ring 1 and 2. Some or all R1 devices
are connected to these PROFINET rings via 2 switches. The R1 devices themselves are
connected via a line topology.
In this configuration variant, the availability of the media redundancy of the PROFINET rings is
limited, since the R1 devices in the lower-level line topology do not benefit from the
PROFINET ring.
①
②
③
④
⑤
⑥
⑦
⑧
Figure 6-16
154
CPU 1
CPU 2
Two fiber-optic cables (redundancy connections)
PROFINET cable (PROFINET ring 1)
PROFINET cable (PROFINET ring 2)
Switch
PROFINET cable (line topology)
IO device ET 200SP (with system redundancy R1)
Configuration variant 1
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF