Application planning
6.3 Configuration versions
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
163
Not recommended configuration variant
The following configuration variants are not recommended:
• Integration into the line topology by looping through the R1 device via port 2 of the two
interface modules.
• Direct connection of ports 1 of the two interface modules on the R1 device.
Result: No redundancy of the network available.
IO device ET 200SP (with system redundancy R1)
PROFINET line (connection port 1 to port 1 of the interface modules)
PROFINET line (line topology via port 2 of the interface modules)
Figure 6-22 Not recommended configuration variant
6.3.7.6 Line topology configuration with R1 devices and switches
Introduction
The section below shows you the configuration of the S7-1500H redundant system with R1
devices and switches in a line topology.
Advantages/benefits
• You can use switches to extend the line topology with lower-level R1 devices by two
PROFINET rings.
• In the configuration variant, one PROFINET ring is connected to each switch. Each
PROFINET ring is located in its own MRP domain.
• This configuration variant enables modular commissioning of the redundant system.
Example: Distributed I/O systems are already mounted and wired. The H-CPUs are each
connected to the distributed I/O systems via the PROFINET interface X1.
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