For some reason, Fas machine not enable DEX by default. Enable it by following steps:

  • Press the programming button on VMC.
  • Enter 90B on machine keypad
  • Then 6B
  • Press A until you see RS232 on machine screen (if already RS232, go next step).
  • Press B to save it
  • Press A to exit programming mode.
  • Turn machine power off/on