Commissioning
Real-time Ethernet port multiplier
41
Version: 2.6
Fig. 51: Setting the TCP/IP operating mode
It is not possible to operate the CU2508 as an independent switch with forwarding rules according to MAC
rules (switch) or IP rules (router).
Settings for the dedicated TCP/IP port
The specified CU2508 port (100Mbit/FastEthernet) is then connected directly to the Windows network
mediation layer; real-time operation of this port is no longer possible. Free TCP/IP network traffic is then no
longer possible on the other CU2508 ports.
Notes
• The IP and MAC address of the used Gbit port are used for TCP/IP communication. Address area/
subnet mask must therefore correspond to the addressed devices.
In the example in fig.
Declaration of a CU2508 downlink port as a TCP/IP port
, the address area is
under the IP mask 255.255.0.0; therefore, all devices must have an IP address from the area
192.168.x.x.
• These settings are changed via the Windows Control Panel -> Network Settings for the adapter. The
CXconfig tool must be used under Windows CE.
• The CU2508 works transparently; all procedures for the address assignment (DHCP, BootP,…) can be
used.
• The throughput depends on the extent of utilization of the downlink port and the Windows network
mediation layer.
Fig. 52: Declaration of a CU2508 downlink port as a TCP/IP port
EoE settings
The virtual EoE switch of the CU2508 driver is tied into the CU2508 Ethernet adapter and accessible in the
Switch
tab of the RT Ethernet adapter. The VirtualEthernetSwitch is activated automatically if devices that
use Ethernet-over-EtherCAT are used in the lower-level EtherCAT systems - the numbers of max. frames
and ports are adapted accordingly.
