As far as I know, this is normal, but I have only used the FANUC/GN6Mb.
When the 'Edit' is flashing the contoller is ready for you to send the file
from your PC. Eventually the NC file will apprear on the screen.
Always check to make sure it got the file complete (there should be a
percent sign at the beginning and end of the file).
If you want to send a file too big for the controller's memory,
you must set the dial to 'Tape' instead of 'Edit',
then Press the green 'Start' key (The machine will then start
running the program line-by-line as it recieves it).