information in the PROFINET Function Manual
(https://support.industry.siemens.com/cs/ww/en/view/49948856).
MRP interconnection
The MRP interconnection process is an enhancement of MRP and allows the redundant
coupling of two or more rings with MRP in PROFINET networks. MRP interconnection is - like
MRP - specified in the standard IEC 62439-2 (Edition 3).
MRP interconnection allows the monitoring of larger topologies with ring redundancy. With
MRP interconnection, you are not limited to the maximum number of 50 devices in a ring
when configuring redundant network topologies. For information on the quantity structure
of MRP Interconnection, refer to the SCALANCE XM-400/XR-500 Web Based Management
(WBM) configuration manual
(https://support.industry.siemens.com/cs/ww/en/view/109760840).
The S7-1500R/H CPUs support MRP interconnection as of firmware version V2.9. Observe the
maximum number of devices that can be connected for R/H-CPUs. Additional information can
be found in the manuals for the R/H CPUs.
4 devices for MRP interconnection connections
2 MRP interconnection connections provide redundant coupling between 2 MRP rings. Four
devices are required for these 2 connections:
•
One media redundancy interconnection manager (MIM)
•
3 media redundancy interconnection clients (MIC):
–
Primary MIC
–
Primary Coupled MIC
–
Secondary Coupled MIC
53
System overview
4.3 S7-1500 R/H-CPUs
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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