There are two possible causes for this:

1. The infrared option is set for data transfer.
2. The current COM port of the MDU does not match the COM port configured in the software.

1. Log in to the Personnel Software and open ‘Extras’ > ‘Dialock Service Software’.
2. Navigate to ‘Program’ > ‘Settings’.
3. In the window that opens, there is a section labelled ‘Hardware’.
   1. Via USB:
      1. Select the appropriate COM port under ‘COM port (MDU)’.
      2. Check the box ‘USB to COM port’ on the right.
   2. Via infrared (wireless):
      1. Check the box ‘IrDA mode’ on the right.
4. Confirm the settings with ‘OK’.

IMPORTANT! When connecting via infrared, the MDU must not be connected via USB at the same time. In addition, IrDA mode should also be activated in the MDU.

1. Open the Windows ‘Device Manager’.
2. Expand the list under ‘Ports (COM & LPT)’.
3. Connect the MDU to the PC and switch it on.
4. A new device should now appear in the expanded list. In many cases, this is even labelled as MDU.
5. The COM port is specified in brackets after the device name.

1. Switch on the MDU.
2. Start from the main menu (press the Home button).
3. Navigate to ‘MDU Functions’.
4. Check whether there is a tick behind IRCom.
5. If there is no tick, navigate to IRCom and press the green tick.
6. The tick should now be set and IrDA mode should be active.