Siemens SINAMICS G220 - Connection-Oriented Communication Protocols

Description of function
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SIMATIC S7 PROFINETcontroller
ET 200 Distributed I/O
SINAMICS Converter
SCALANCE Redundancy manager
Figure14-5 Example of a ring topology
Ethernet as basis for PROFINET only permits a single, unique data path from the controller to
a device via a line-type topology or a star-type topology. MRP allows a line-type topology to
be closed using a redundancy manager to create a ring-type topology. This means that every
device can be accessed via 2 data paths.
When a device fails or if a cable is interrupted, the redundancy manager informs the device
that the ring-type topology has now been switched over to a linear-type topology. The
devices can be accessed again once a switchover has been made to a linear-type topology.
In the case of an interrupted cable, data transfer is only brie󹪞y interrupted (0...200ms) as
the system switches over to the redundant data path.
2 alternatives are available if a brief interruption is not permitted:
• The watchdog timer in the hardware con󹪝guration is > 200ms.
• IRT High Performance data transfer is set.
14.4.3.3 Connection-oriented communication protocols
Overview
The converter supports connection-oriented communication protocols.
Connection-oriented communication ensures that data arrives in the correct order.
Functions
14.4PROFINET communication
SINAMICS G220 converter
330 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB