Configuration in the CX20x0 & CX50x0 system

The embedded PCs of CX20x0 and CX50x0 series feature a special integrated I/O interface for E-bus and K-bus with automatic switching. The EL66xx devices in the TwinCAT system generally appear as virtual switch, with the EtherCAT system as the "backbone". In the CX20x0 and CX50x0 system, the internal interface connection is not implemented through a network interface, but through an FPGA.

Due to the internal connection via FPGA and the automatic E-bus and K-bus detection, with offline configuration the Ethernet port only becomes visible when the configuration is activated. To configure the Ethernet port offline, proceed as follows:

• Due to the automatic E-bus and K-bus switching, any terminal should be connected with the appropriate bus
• The internal PCI port is detected during offline configuration and must be selected



• The customer specified configuration can be created, and the EL66xx can be inserted in the configuration



• The Ethernet port is detected after "Reload I/O devices" (F4) and then appears under network connections
• as "Local Area Connection 4"



• The port can now be configured as required. The settings are applied and saved. Even if the port disappears again, the settings are retained for subsequent commissioning.

If the problem persists, i.e. if the Ethernet port of the EL66xx still fails to show up in the network connection, see troubleshooting tips below. Follow these tips and the countermeasures listed.

Prerequisites