Yes, you can create an offline NI 9144 in the LabVIEW Project. Simply download and install the free NI-Industrial Communications for EtherCAT driver onto your host computer. The next time you open LabVIEW, create an offline cRIO-9074 and then right-click on the cRIO to create an offline EtherCAT Master Device. Right-click on the EtherCAT Master Device to add an offline NI 9144, and then right-click on the NI 9144 to create an offline C Series module of your choice. You won't be able to receive simulated data from these I/O channels, but at least you can program them in the block diagram before you actually have any hardware.