Commissioning in STEP 7
5.4 Communication between Linux and CPU
CPU 1505SP (F) Ready4Linux Version 2.7
Operating Instructions, 05/2019, A5E46864285-AA
47
5.4 Communication between Linux and CPU
The CPU has a virtual Ethernet network via which the CPU can communicate with Linux
applications, and in particular with OPC UA. Two interfaces are available.
The "runtime communication interface" is used as the communication interface on the CPU.
The "Siemens RT-VMM Network Adapter" interface is used under Linux.
Siemens RT-VMM network adapter
Runtime communication interface
X2 interface of the Open Controller
X1 interface of the Open Controller
Figure 5-1 Overview of interfaces
The following options are available for using OPC UA:
● Using OPC UA locally on the same PC (Page 48)
● Using OPC UA remotely over virtual Ethernet interfaces
– Establishing a connection with IP routing (Page 50)
– Establish connection via Network Address Translation (NAT) (Page 54)
– Establishing a connection via a network bridge (Page 58)
The virtual Ethernet interfaces do not support PROFINET IO or PROFINET IRT.
A configured OUC over virtual Ethernet interfaces will not be supported.
Some OPC UA clients do not support operation via port forwarding.
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