JKAVS
Just a really quick reply.... No you don't need the EK1100 hooked up during installation....
The network card is specific... you must have a Intel chip.. Beckhoff has a list of the compatible cards, but only Intel chips work. Will try to get list later. Just busy with paperwork this weekend.
If you open a command prompt and do a "ethercat" and it generates the ethercat info list, then you have it installed and it would be the network card. Also you must edit /etc/default/ethercat to match the hardware of the installation PC... do a "ifconfig" to get the address. Then pico /etc/default/ethercat to edit the MASTER0_DEVICE= section. Afterwards do a "sudo update-ethercat-config" If you haven't done any of this, then that is the problem, or one of the problems.
Also you must have the XML file loaded to get LCNC to fire up. It must match what you have for hardware... if only a EK1100 and no terminals, then real simple XML.
Sorry so quick and short, just busy with paperwork.
Robert