Connection to PROFINET IO
7.2 MRP configuration in STEP 7
SCALANCE X-200
Configuration Manual, 03/2015, C79000-G8976-C285-06
157
MRP configuration in STEP 7
Configuration in STEP 7
To create the configuration in STEP 7, select the parameter group "Media redundancy" on
the PROFINET interface.
Set the following parameters for the MRP configuration of the device:
● Domain
● Role
● Ring port
● Diagnostic interrupts
These settings are described below.
Note
In the MRP configuration in STEP 7, make sure that all devices in the ring have a valid MRP
configuration before you close the ring. Otherwise, there may be circulating frames that will
cause a failure in the network.
One device in the ring needs to be configured as "redundancy manager and all other devices
in the ring as "clients".
Note
Starting up and restarting
The MRP settings remain in effect following a restart of the device or following a power down
and hot restart.
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, set the role of the relevant device to "Not a node in the ring".
If you want to configure a single MRP ring, leave the factory setting "mrpdomain 1" in the
"Domain" drop-down list.
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.
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