Siemens SIMATIC PROFINET Function Manual page 149

4. Select the ring 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.
Figure 5-36
Automatic MRP configuration
You can also have the media redundancy roles assigned automatically for your PROFINET
devices in the ring.
To have the media redundancy roles assigned automatically, click the "Configure MRP
automatically" button. STEP 7 automatically assigns the media redundancy role for each
device in the ring. After the automatic MRP configuration, you can make modifications to the
media redundancy roles in the "MRP role" column.
"Media redundancy" setting options
Media redundancy role
Depending on the device used, the roles "Manager", "Manager (Auto)", "Client" and "Not
device in the ring" are available.
Rules:
● A ring must have precisely one device with the role "Manager". No additional devices with
the role "Manager" or "Manager (Auto)" are permissible. All the other devices may only
have the "Client" role.
● If a ring has no device with the "Manager" role, the ring must at least have a device with
the role "Manager (Auto)". Any number of devices with the "Client" role may exist.
PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG
MRP domain
5.4 Media redundancy (ring topologies)
Functions
149