Siemens SIMATIC ET 200AL, System Manual

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Functions
5.4 Media redundancy (ring topologies)
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
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Rules for the configuration of multiple rings
• MRP role at multiple rings:
– The device that belongs to all the rings must have the MRP role in every instance that is
entered in the GSD file in the "SupportedMultipleRole" attribute.
– The switches from the series SCALANCE X300 as of version 4.0 and the switch X414 as
of version 4.10 support the MRP role "Manager" for multiple rings.
• If the device that belongs to all rings has the "Manager" role in one ring, no devices with
the "Manager (Auto)" role may exist in this ring.
Configuring multiple rings
To configure an MRP configuration with multiple rings, follow these steps:
1.
In the topology view, interconnect the ring ports of the devices that are intended to belong
to an MRP domain to form a ring.
2. Select the PROFINET IO system in the network view.
3. In the Inspector window, navigate to "Properties" > "General" > "PROFINET" > "MRP domains"
in the "Ring interconnections" field.
This field shows you all the topological rings in the IO system with the associated MRP
domains.
4. Select one of the rings generated above in the "Ring interconnections" field.
The table below it shows all the PROFINET devices in the ring.
5. Set the media redundancy role for the PROFINET devices in the MRP role column.
Example of multiple rings
The following figure shows an example configuration for multiple rings.
Figure 5-43 Example configuration with two rings ① and ②