Connection to PROFINET IO
7.2 MRP configuration in STEP 7
SCALANCE X-200
158 Configuration Manual, 03/2015, C79000-G8976-C285-06
If you leave the setting for "Domain" as the factory set "mrpdomain-1", the defaults for "Role"
and "Ring ports" also remain active.
If you configure multiple MRP rings, the nodes of the ring will be assigned to the individual
rings with the "Domain" parameter.
Set the same domain for all devices within a ring. Set different domains for different rings.
Devices that do not belong to the same ring must have different domains.
The choice of role depends on the following use cases.
● You want to use MRP in a topology with
only with Siemens devices and without
monitoring diagnostic interrupts:
Assign all devices to the "mrpdomain-1" domain and the role "Manager (Auto)".
The device that actually takes over the role of redundancy manager, is negotiated by
Siemens devices automatically.
● You want to use MRP in a topology with
only with Siemens devices and
without monitoring diagnostic interrupts:
– Assign precisely one device that connects the rings the role of "Manager (Auto)".
– For all other devices in the ring topology, select the role of "Client".
● You want to use MRP in a ring topology that also includes non-Siemens devices or you
want to receive diagnostic interrupts relating to the MRP status from a device (see
"Diagnostic interrupts"):
– Assign precisely one device in the ring the role of "Manager (Auto)".
– For all other devices in the ring topology, select the role of "Client".
● You want to disable MRP:
Select the option "Not node in the ring" if you do not want to operate the device within a
ring topology with MRP.
Note
Role after resetting to factory settings
With brand new Siemens devices and those reset to the factory settings the following
MRP role is set:
CPs:
"Manager (Auto)"
SCALANCE X-200, SCALANCE X-300 and SCALANCE X-400:
"Automatic Redundancy Detection"
If you are operating a non
-Siemens device as the redundancy manager in the ring, this
may cause loss of the data traffic.
With brand new SCALANCE XM
-400 and SCALANCE XR-500 IE switches and those set
to the factory settings, MRP is disabled and s
panning tree enabled.
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