Siemens SIMATIC S7-1500 System Manual page 204

Configuration
8.4 Configuring H-CPUs with PROFINET rings and R1 devices
Requirements
The configuration detailed assumes that:
• You have configured the H-CPUs. For more information, refer to the section Configuring
R/H CPUs (Page 196).
1. Creating additional MRP domains
With an R1 device, communication takes place via two separate PROFINET rings. To do this,
you must create another MRP domain in STEP 7. To do so, proceed as follows:
1. Switch to the network view.
2. Click on the connection PN/IE_1 (Sync-Domain_1) between the PROFINET interfaces X1 of
the two H-CPUs.
3. Navigate in the Inspector window to "Properties > General > PROFINET subnet > Domain
management > MRP domains".
4. Create another domain "mrpdomain-2" in the table in the second row.
Figure 8-8 Create another MRP domain "mrpdomain-2"
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S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD