Configuration Of Profinet Rings With R1 Devices - Siemens SIMATIC S7-1500 System Manual

Application planning
5.3 Configuration versions
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Figure 5-6 S7-1500H configuration with S2 devices and switch in a line topology
NOTE
If the AR to the backup CPU fails in a line topology (e.g., due to line breakage), then the
redundant system must synchronize less data. Result: The cycle time is reduced.
NOTE
Migration of a PROFINET ring to a line topology
If you want to migrate a configuration scenario with PROFINET ring into a line topology, note
the following changes:
• Remove a ring segment (PROFINET cable) at X1 interfaces of the H-CPUs, e.g., directly
connected PROFINET cable at X1 P2 interfaces.
• Change the MRP roles of the H-CPUs and the IO devices to the setting "No device in the
ring".
• If necessary, adjust the configured topology. Pay attention to HMI devices that are
connected in the PROFINET ring via the system IP address.
5.3.3.2

Configuration of PROFINET rings with R1 devices

Introduction
The section below shows you the configuration of the S7-1500H redundant system with R1
devices in 2 PROFINET rings.
Advantages/benefits
• Communication takes place via two separate PROFINET rings.
• As with system redundancy S2, system redundancy R1 enables uninterrupted process data
exchange with the S7-1500H redundant system in the event of a CPU failure.
• The redundant system continues to operate in the event of a failure of an interface
module of an R1 device or a line interruption of a PROFINET ring.
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PROFINET cable (line topology)
HMI device (switched S1 device or S2 device)
PROFINET cable (additional line topology)
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD