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Please note:
If you use multiple CPs in a station and wish to use IP routing, you can only configure a
router for one CP in the station.
When the security function is activated, additional IP firewall rules are created, which you
can modify in advanced firewall mode of the Global Security settings.
4.4.4
Virtual interface of the CPU
The CP 1543-1 supports the virtual interface of the CPU.
Requirement
The following requirements must be met to use the virtual interface of the CPU:
● S7-1500 CPU firmware V2.8 or higher
R/H CPUs do not support the function.
● CP 1543-1 firmware V2.2 or higher
The security functions of the CP are disabled.
● Configurability: As of STEP 7 V16
Virtual interface of the CPU
As of firmware version 2.8, the S7-1500 CPU offers the option of reaching its IP-based
applications, such as OPC UA, not only via its local PROFINET interfaces, but also via the
interface of one CP 15431 in the same station.
The virtual interface is called W1.
Features of the virtual interface
The virtual interface is not a fully diagnosable interface with the familiar properties of
conventional interfaces. The virtual interface is not displayed in the graphical views, because
the internal connection via the backplane bus does not represent an S7 subnet and does not
have any ports. A physical connection by means of a network cable therefore cannot be
established.
The following IP-based services can also be reached via the virtual interface:
● OPC UA (client and server)
● Programmed OUC connections
● S7 communication: ES/HMI access and instructions for S7 communication such as
PUT/GET
The IP address of the virtual interface is displayed in STEP 7 and in the display of the CPU.
The activated interface can be used in the configuration of the communications partners.
For information on the restrictions of the virtual interface as compared to physical interfaces,
see the STEP 7 information system.
CP 1543-1
Operating Instructions, 12/2019, C79000-G8976-C289-08
Configuration, programming
4.4 IP configuration
37
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