HTML5 visualization controls disabled on CODESYS Control for Linux SL - overlay not supported?

lzml — Wed, 05 Aug 2026 09:41:06 -0000

Thanks for the suggestion - I updated everything via the CODESYS Installer and restarted, but I'm still hitting the same error.

What I did
- Updated via Tools > CODESYS Installer (had to trigger the update-list refresh manually, it doesn't do this automatically on open)
- Visualization system libraries (VisuElems, VisuElemsAlarm, VisuInputs, VisuNativeControl, etc.): 4.7.0.0 -> 4.10.0.0
- CODESYS Control for Linux SL: 4.15.0.0 -> 4.21.0.0 (based on CODESYS SDK 3.5.22.20)
- Restarted CODESYS Development System

Checked project environment (Project > Project Environment) after restart
- Compiler version: 3.5.22.0
- Library versions: all up to date
- Visualization Profile: CODESYS Visualization 4.10.0.0
- SoftMotion version: 4.20.2.0

Result: compiling with Device = CODESYS Control for Linux SL still fails with the same error:

"Overlay is not supported for your target visualization device."

The custom HTML5 control is still disabled/missing from the Toolbox with this Device selected (same as before), and still appears normally when I switch the Device to a Windows target.

Is there anything else specific I should check (e.g. a setting on the Device description itself, a different SL package/edition, or is WebVisu overlay for custom HTML5 controls simply not implemented yet for CODESYS Control for Linux SL regardless of package version)? Any pointer appreciated.

HTML5 visualization controls disabled on CODESYS Control for Linux SL - overlay not supported?

TimvH — Wed, 05 Aug 2026 08:11:29 -0000

I would suggest to install the latest visualization and visualization add-ons. Go to Tools - CODESYS installer to updates these add-ons (or just start the CODESYS installer through the Windows start menu).

After installation, restart CODESYS SP22 and update the project to use this new visualization profile (you can update this through the menu Project - Project Environment - Visualization Profile).

HTML5 visualization controls disabled on CODESYS Control for Linux SL - overlay not supported?

lzml — Wed, 05 Aug 2026 07:42:28 -0000

Hello,

I'm developing a custom HTML5 visualization control (via the HTML5 Control Editor / Tools > Visualization Element Repository) and I'm running into what looks like a target-device limitation when trying to deploy it to CODESYS Control for Linux SL. I'd like to understand whether this is a known/expected limitation or something in my setup.

Environment
- CODESYS Development System: V3.5.22.0
- Target runtime: CODESYS Control for Linux SL, package version 4.15.0.0 (installed together with CODESYS Edge Gateway for Linux 4.15.0.0)
- Visu system libraries (VisuElems, VisuElemsAlarm, VisuInputs, VisuNativeControl, etc.): version 4.7.0.0
- Host OS: Debian RT (minimal/base installation)
- We only use WebVisu, not TargetVisu.

What I did
1. Built a custom HTML5 control following the official HTML5-API-Examples pattern (.html5control.xml manifest + ElementWrapper.js + CSS), installed it successfully via the HTML5 Control Editor ("Save and Install") into the Visualization Element Repository.
2. In the Visualization Manager, enabled "Support client animations and overlay of native elements" (documented as required for HTML5 controls to work at all).
3. With the project's Device set to CODESYS Control for Linux SL, compiling/downloading fails with:

"Overlay is not supported for your target visualization device." (Visualization Manager)
Build stops with 1 error, download not possible.

Isolating the cause
- The Visualization Element Repository confirms the control is correctly installed.
- With the project Device set to a Windows-based device, the HTML5 control appears and is enabled in the Toolbox as expected.
- With the project Device set to CODESYS Control for Linux SL, the HTML5 control is disabled/missing from the Toolbox entirely, even though it's installed in the repository.

This points to the Linux SL device description simply not declaring overlay/HTML5 support, rather than a missing package or Debian-side dependency (WebVisu itself already works fine for standard/native visualization elements on this same target).

Questions
1. Does CODESYS Control for Linux SL currently support WebVisu overlay (and therefore custom HTML5 controls)? I found documentation stating overlay support for target visualizations (Windows and Linux) was added starting with CODESYS Development System V3.5.17.0, but that seems to refer to TargetVisu, and our case is WebVisu-only on a Linux runtime.
2. If not currently supported, is this on a roadmap, or is there a different Linux runtime package/edition that does support WebVisu overlay for HTML5 controls?
3. Is there any Linux-side configuration or package needed to enable this (given the check appears to happen against a static device capability declaration rather than a live server check), or is this purely a matter of the device description bundled with the current Control for Linux SL package?

Thanks in advance for any pointers.

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