---
title: Litmus Edge 4.0.15
slug: litmusedge/litmus-edge-4015
docTags:
createdAt: 2026-07-29T18:24:18.912Z
---
Release Date: July 31, 2026
Review the current list of [Limitations](docId\:eAX_YFkPGGSV_LHc4Um5u).
:::hint{type="info"}
**Note:** For information on updates to APIs, see the [Litmus Edge](https://api.litmus.io/view/2s9Y5R1RvG#f4804d0e-07a6-4bbc-862e-a346cdc53870) and [Litmus Edge Manager](https://api.litmus.io/view/2s9Y5R1RvG#b7e9be00-4246-4091-8e34-bbe527228b46) change logs.
:::
## Enhancements
| Description |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Device Hub:**
* The Yokogawa DX Ethernet driver now always requires a password value (default of `0`). The non-functional **Settings Mode** option has also been removed from the driver. |
| **Digital Twins:**
* Added `hierarchyPath` and `hierarchyMetadata` static attributes to the Digital Twins model. This lets Litmus Edge Manager keep an instance's asset-hierarchy location in sync with Litmus Edge.
* Removed the 2,000-item limit on the number of dynamic attributes that can be created on a single model. This allows for models that require a higher limit.
* Added `$EDGE_DT_MODEL_ID` and `$EDGE_DT_INSTANCE_ID` as available system variables for use in Digital Twins model and instance configuration. This supports tracking and analysis of Digital Twins data in external systems. |
## Resolved Issues
| Description |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **DeviceHub:**
* Fixed an issue where the Emerson DNP3 Ethernet with FB Extensions driver did not poll for history. The **Polling Interval** field was missing from the **Add** and **Edit** pages for History Alarm Event record tags in versions 4.0.4 to 4.0.14.
* Fixed issue where the IEC102, Mitsubishi FX, Siemens TI505, and Fanuc drivers accepted certain multi-character address suffixes that produced incorrect register addressing. These suffixes are no longer supported.
* Fixed issue where the Beckhoff TwinCAT3 Ethernet Absolute (Gen1.3) and Beckhoff TwinCAT3 Ethernet Symbolic (Gen1.3) drivers returned a timestamp of `0` for failed tag reads. Tags now publish the current timestamp in this case. |