This section explains each option and parameter available in MEX PDI Builder.

Once the installation is finished, open MEX PDI Builder and select the unit.



If correctly connected, MEX PDI Builder will display the mode in which the connected unit is. In addition, a PDI error button pdi_errors will appear:


MEX PDI Builder

  • MEX mode: The MEX unit should appear in Normal mode, as shown in the figure above, or Maintenance mode.

    It can also appear as Maintenance mode (loaded with errors) or Normal mode - Disconnected.


    Maintenance mode (loaded with errors) appears when something went wrong in the configuration. For more information, see Maintenance mode (loaded with errors) - Troubleshooting section of this manual.

  • pdi_errors PDI Errors button: The user can check if the connected unit has PDI Errors by simply clicking on it. If there are no errors, the following message appears:


    MEX PDI Builder - PDI Errors message

The user can access now to 3 configuration options:


MEX PDI Builder options

  • MEX: It allows the user to work with offline configurations. A previously exported MEX PDI configuration can be opened and modified or it is also possible to build a new one from the default configuration.

  • Upload PDI: A previously exported MEX PDI configuration can be imported to the linked MEX.


    When a configuration is loaded into MEX with a version older than the software version being used, an automatic migration from the configuration version to the software version being used will be performed.

    For more information on this, see Migrate configuration - Troubleshooting section of this manual.

  • Open MEX: By clicking on this option, MEX PDI Builder configuration menu opens with the configuration (the PDI files) loaded in the MEX. Then, the user can modify it online.


PDI files are the files that contain the configuration of the MEX. These files are located in a single folder, setup, which contains several .xml files, where all parameters and the control system are stored.


PDIs files

Finally, click on ‘MEX’ to edit a configuration offline or ‘Open MEX’ to open the configuration and start editing it online.


MEX unit must enter in Maintenance mode for the user to start editing, so it is necessary to accept the confirmation panel below.


Enter maintenance mode - Confirmation panel


Open MEX

Once in Maintenance mode, the user can access the Initial menu. The different ‘buttons’ that can be seen in this menu of the MEX PDI Builder are explained below.


Initial menu

  1. Save and close: After changes are done, press on the save button to apply the changes. While saving, a percentage of saving process is displayed.

    In order to save the configuration in the MEX unit it is necessary to RESET, therefore the MEX PDI Builder software will close. For this reason, the user must accept the following panels:


    Save and close - Confirmation panels


    As MEX is reset, it is not advisable to save changes during flight tests.


    This button will only appear if a MEX is connected, i.e. when working offline this button will not be available.

  2. Export PDI: After modifying a configuration, press the export button to store the configuration in the local storage.

    Users can store this configuration in an empty folder or in the folder where the previously imported configuration is stored. With the latter option, the “original” configuration will be overwritten by the one with the new changes.

  3. Import PDI from repo: The user can import a configuration file from the GitHub repository and modify it. After that, if the Save and close button (1) is pressed, this configuration will be uploaded to the connected MEX.

  4. Import PDI from local storage: The user can import a configuration file from the local storage and modify it. After that, if the Save and close button (1) is pressed, this configuration will be loaded into the connected MEX.

  5. Feedback: Users can report a problem they have encountered by creating an issue in their own ‘Joint Collaboration Framework’. The ‘Download’ button downloads a zipped folder with the current MEX configuration and more information needed for Embention to resolve the issue. It is advisable to attach this folder when creating the issue.


    The user’s ‘Joint Collaboration Framework’ is simply a Github repository for each customer.

    In case of having any questions about this Joint Collaboration Framework, please see Joint Collaboration Framework user manual or contact


    Feedback window

  6. These are the different functions of MEX. They are explained in the following sections.