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Siemens Industrial Ethernet Switches SCALANCE X-200 User Manual

Page 251

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PROFINET IO functionality

8.2 Settings in HW Config

SCALANCE X-200
Operating Instructions, 12/2011, A5E00349864-19

251

These settings are described below.

Note
Prioritized startup
If you configure MRP in a ring, you cannot use the "prioritized startup" function in PROFINET

applications on the devices involved.
If you want to use the "prioritized startup" function, then disable MRP in the configuration.
In the STEP 7 configuration, properties dialog of the PROFINET interface > "Media

redundancy" tab > "MRP configuration" box, set the role to "Not node in the ring".

Domain

All devices configured in a ring with MRP must belong to the same redundancy domain. A

device cannot belong to more than one redundancy domain.
If you leave the setting for "Domain" as the factory set "default-mrpdomain", the factory

settings for "Role" and "Ring ports" also remain active.
The MRP settings remain in effect following a restart of the device or following a power down

and hot restart.

Role

NOTICE

If you reset to the factory settings, the MRP role of the device is also reset. If you are

operating a non-Siemens device as the redundancy manager in the ring, this may cause

loss of the data traffic.

The choice of role depends on the following use cases.