Siemens SIMATIC PROFINET Function Manual page 153

The manager monitors all the rings individually: It checks for each particular ring (an MRP
domain) whether the transmission path is intact. To do this, it uses an MRP instance in each
case. An MRP instance is required for each connected ring (set up automatically by
STEP 7).
Figure 5-39
Requirements
● SCALANCE X300 as of version 4.0
● SCALANCE X414 as of version 3.10
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
– The switches from the series SCALANCE X300 as of version 4.0 and the switch X414
● 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.
PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG
Configuration with several rings
is entered in the GSD file in the "SupportedMultipleRole" attribute.
as of version 4.10 support the MRP role "Manager" for multiple rings.
5.4 Media redundancy (ring topologies)
Functions
153