Rna - Siemens SIMATIC NET System Manual

Connecting up and cabling
Each frame duplicate sent using the PRP mechanisms is given in identifier that specifies
whether it is sent via LAN A or LAN B.
Note
Cabling
Make sure that all the PRP ports of the nodes and the SCALANCE X204RNA on LAN A and
LAN B are connected correctly. A message with the identifier "LAN A" must be received at
the corresponding port.
The PRP ports of SIMATIC NET devices have the following identifiers. The CP ports are the
ports of the interface with PRP capability.
● Ports for connection to LAN A
– CPs: X2/P1
– SCALANCE X204RNA: PRP A
● Ports for connection to LAN B
– CPs: X2/P2
– SCALANCE X204RNA: PRP B
2.3.8

RNA

Redundant Network Access (RNA)
In Siemens Industry, Redundant Network Access (RNA) stands for devices and software that
support the redundancy protocol "Parallel Redundancy Protocol" (PRP). RNA allows the
connection of devices to redundant Ethernet network structures.
The product names of the RNA devices end with "RNA".
Some devices of the SCALANCE X-200RNA product line also support the redundancy
protocol "High-availability Seamless Redundancy" (HSR).
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
Network structures and network configuration
2.3 Media redundancy
91