For some reason, EVA/DTS or so called DEX NOT enabled on all FAS machines by default, which means you will have data report fail error when first time plugin our DTU.

To enable DEX on FAS machine, please follow these steps:

  1. Press the Program button to go to program machine
  2. Enter 90B on machine keypad.
  3. Then enter 6B,
  4. Then press A until you see RS232, then B to save it.
  5. A to exit
  6. Power off the machine then power on.

The DEX should be able to be read.