The CPU on Rico board is AM437x, it includes AM4376, AM4377, AM4378, AM4379, some of them support EtherCAT, some of them cannot. Below is the picture of AM437X series different functions:

We supply AM4378 on Rico board (Part number: MYS-4378-100-C-S) by default, it has 3D graphics accelerator function, but it can’t support EtherCAT. We have designed a development board which is specially for EtherCAT applications, please refer to MYD-C437X-PRU:

http://www.myirtech.com/list.asp?id=559