Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual page 140

Parameter assignment / addressing
5.6 Configuring PROFINET IO
PROFINET IO device
Distributed field devices such as I/Os, drives (e.g. SINAMICS S120) or operator terminals
are designated as I/O devices. The function is comparable to a PROFIBUS DP slave.
Delivery condition
In the delivery condition, the onboard PROFINET IO interface does not have an IP address
or a subnet mask.
Media redundancy (MRP), as of V4.3
It is possible to establish redundant networks via the Media Redundancy Protocol (MRP).
Redundant transmission links (ring topology) ensure that an alternative communication path
is made available when a transmission link fails. The PROFINET devices that are part of this
redundant network form an MRP domain.
MRP guarantees media redundancy in the event of a problem in the ring. The switchover of
the ring is performed by the Redundancy Manager.
The switchover times depend on:
● The actual topology
● The devices used and
● The network load in the relevant network
The typical reconfiguration time of the communication paths for TCP/IP and RT frames in the
event of a fault is < 200 ms.
In most systems, the switchover time of MRP is far above the PROFINET update time for
cyclic data, so that a failure for cyclic data is detected. The PROFINET connection therefore
fails and is reestablished after the switchover by the Redundancy Manager. In this way, an
error can be corrected in the network, while the system continues to run with bumps.
Note
Both during the interruption of the ring, as well as when correcting the interruption (e.g.
repair of the defective cable), there is a brief failure of the communication.
Ring ports
A SIMOTION/SINAMICS device may only be inserted in an MRP ring as a node with MRP-
capable ports. For SIMOTION D, the first two ports of the PROFINET IO interfaces are
designed as ring ports.
These two ports are marked with an "R" in the module rack in HW Config.
Note
Only devices with MRP-capable ports may be inserted in an MRP ring. If MRP-capable ports
are not used, the reconfiguration times can be in the seconds range.
140
Commissioning and Hardware Installation Manual, 02/2012
SIMOTION D4x5-2