I own a PXI 1078 connected to a EtherCAT Expansion Chassis NI 9145. The expansion chassis will be used to implement FPGA I/O. At the same time, we want to control a Kollmorgen AKD drive.
My question is: if I put the ethercat expansion chassis in FPGA mode, how are the data transmitted to & back to the PXI? Can I still communicate with the motor drive or does the whole system have to be in Scan mode?
Solved! Go to Solution.
it depends on your implementation
A simple way are user defined variables on the FPGA and use the EhterCAT implementation in parallel with this.
thanks for the links and the advice. I am realizing that by using the Ethercat bus, I am loosing the advantage of the backpane synchronization which is offered with PXI. Would you recommend adding I/O and FPGA cards into the PXI 1078 and running everything there instead of going with remote expansion chassis like the NI-9145?