Once again I am asking your advice on a matter regarding Beckhoff hardware, specifically a CX1020 embedded PC. I am using this CPU to design a system that could eventually be expanded through EtherCAT, beside connecting at least 2 brushless drives for axis motion. I do not understand well, or perhaps did not get after reading all the documentation in infosys the following: - CX1020 has 2 RJ45 ports on the CPU, can one of this port be configured to act as a EtherCAT connection? Documentation says only the ports "can be" used as such, but are not intended for that use - if the above is not possible, adding an EK1100 interface to the CX will allow me to add other EtherCAT stations? - another question, decidedly OT: if i order a CPU without any TwinCAT runtime, what i need to install to make a plc program run on that hardware?