# DVUnused

DVUnused is a Windows application for analysing Emerson DeltaV FHX export files and identifying configuration objects that appear not to be referenced by other exported configuration.

DVUnused is developed and distributed by Mavabé Technical Consultancy B.V., trading as Batch-A.

## INSTALLATION

DVUnused is supplied as a portable application and does not require installation.

1. Extract the complete contents of the DVUnused ZIP file to a folder of your choice.
2. Keep DVUnused.exe and all supplied DLL files together in the same folder.
3. Run DVUnused.exe.

Do not run DVUnused directly from inside the ZIP file.

DVUnused is supplied as a self-contained application. A separate installation of the Microsoft .NET Desktop Runtime is not required.

## LICENSING

DVUnused requires a valid licence.

Licences are supplied separately as a DVUnused.lic file and are normally valid for one year from the date of issue.

When DVUnused is started without a valid licence, it will prompt you to select a licence file.

You can also replace or update a licence from within DVUnused.

The selected licence is stored in the user's application data folder and does not need to remain in the DVUnused program folder.

Licences are not tied to a specific computer. Use of DVUnused remains subject to the terms in LICENSE.txt.

For licence requests or renewals, contact:

[info@batch-a.com](mailto:info@batch-a.com)

## USING DVUnused

1. Start DVUnused.exe.
2. Select one or more FHX files using "Open FHX...".
3. Load additional FHX files where required. Enable "Clear before import" to replace the currently loaded files rather than add to them.
4. Use the "Show", "Type", "Category" and "Name" filters to review the analysis results.
5. Select an object to see which loaded configuration objects reference it.
6. Double-click an object to view its source FHX configuration.
7. Use "Export Excel..." to export the currently displayed analysis results and reference information.

DVUnused analyses references within the FHX files that have been loaded. An object reported as "Unused" has no detected reference from the analysed configuration. This does not prove that the object is unused elsewhere in the DeltaV system, because configuration that references it may not have been included in the loaded FHX files.

When the same configuration object occurs in multiple loaded FHX files, DVUnused uses the latest revision identified from the FHX revision timestamp.

## SYSTEM REQUIREMENTS

* Microsoft Windows 10 or Windows 11, 64-bit
* No DeltaV installation is required for analysing FHX files
* No internet connection is required for normal operation or licence validation

## IMPORTANT

DVUnused operates on exported FHX files. It does not connect directly to or modify a running DeltaV system.

An "Unused" result should therefore be treated as a candidate for further review, not as confirmation that the configuration object can safely be deleted.

Users remain responsible for reviewing and validating the analysis results before deleting, modifying or otherwise acting on DeltaV configuration identified by DVUnused.

DVUnused is an independent Batch-A product and is not affiliated with, endorsed by, or supported by Emerson Electric Co. or its affiliates.

DeltaV is a trademark of Emerson Electric Co. or its affiliates.

## SUPPORT

For product information, licensing and support:

Batch-A
Mavabé Technical Consultancy B.V. (KvK Midden-Brabant 91.218.438) trading as Batch-A
[www.mavabe.eu](https://www.mavabe.eu)
[www.batch-a.com](https://www.batch-a.com)
[info@batch-a.com](mailto:info@batch-a.com)

When requesting support, please include the DVUnused version shown in the About window and a description of the problem.

Do not send confidential FHX files unless specifically requested and authorised.
