For both the development and target computers, the EtherCAT® I/O module has the following requirements:
Each Ethernet card must be compatible with EtherCAT communication.
To keep non EtherCAT traffic from interfering with the protocol timing, assign each Ethernet card a static IP address and a nonroutable subnet.
For information on setting up the dedicated Ethernet card, see your network administrator.
On the target computer, install two Ethernet cards. Dedicate one card to linking the development and target computers. Dedicate the other to model-based EtherCAT communication.
On the development computer, as a best practice, install two Ethernet cards in addition to your local area network card. Dedicate one card to linking the development and target computers. Dedicate the other to EtherCAT network configuration.
Configure the development computer Ethernet card that you are using for EtherCAT to enable only the Internet Protocol Version 4 (TCP/IPv4) driver. See the TwinCAT® 3 documentation for information on manually creating an EtherCAT configuration file.
With only one card on the development computer, before configuring the EtherCAT network, unplug the Ethernet link cable and plug in the EtherCAT network cable. Before building and downloading the model, unplug the EtherCAT network cable, plug in the Ethernet link cable, disable the EtherCAT filter, and restart your development computer.