Basic configuration
This chapter describes the basic configuration that is essential for operating the CU2508-0022.
In the Solution Explorer, click on the device “RT-Ethernet Adapter” that was created in the chapter Integrating into a TwinCAT project.

Configure the device in the following tabs:
“Adapter”

Make sure that the Gigabit Ethernet port to which the CU2508-0022 is or will be connected is set here.
“Ports”

- 1. Set the number of downlink ports of the CU2508-0022 that you require in the “Virtual Port Count” field.
- 2. If you want to use one of the ports of the CU2508-0022 exclusively for TCP/IP traffic, select the port in the “TCP/IP” field. Real-time traffic (e.g. EtherCAT) is then no longer possible via this port.
Otherwise, select the “via EoE” option. TCP/IP communication is then possible via a virtual switch, see Configuration of TCP/IP communication. - 3. Select “EtherCAT Switch Link Protocol (ESL) (CU25xx required)” under “Virtual Port Selection via”.
Completion of the basic configuration
- 1. Click on the “Reload Devices” button in the TwinCAT toolbar.
- If the CU2508-0022 is connected and supplied with power, the “Run” LED lights up and the “Int Act/Error” and “L/A” LEDs on X09 flash green.
- 2. Configure the downlink ports of the CU2508-0022, see chapter Configuration of the downlink ports.