WinCC Comfort V17 to Unified Comfort V17 Compatibility Guide

Overview

Siemens TIA Portal V17 ships with two parallel HMI engineering lines that share the same installation media: the classic SIMATIC WinCC Comfort / Advanced / Professional line (used to configure Comfort Panels, KTP, TP and the older Multi Panels) and the newer SIMATIC WinCC Unified line (used to configure Unified Comfort Panels, Unified PCs and the RT Unified runtime). The single most common question raised by engineers planning a migration from Comfort Panels to the newer Unified Comfort Panels (UCP) is whether a pre-existing WinCC Comfort license can be reused to engineer UCP devices without purchasing a second license.

The answer is yes. A WinCC Comfort V17 license (6AV2 1xx-xxxxx-xxxx) is recognized by the TIA Portal V17 license manager as a WinCC Unified Comfort V17 entitlement, provided the WinCC Unified Engineering package is selected during the TIA Portal V17 installation. No PowerPack, no upgrade fee and no second license key are required: the WinCC Unified option set is bound to the same Software Protection Key (USB or Automation License Manager) as the Comfort license.

This reference documents the exact installation path, the catalog cross-reference in the Siemens ST80 catalog, the runtime-version compatibility rules that govern a download from the engineering station to the panel, and a troubleshooting matrix that resolves the most common compile / download errors raised when the Unified option is not correctly enabled.

License Compatibility Matrix: WinCC Comfort vs WinCC Unified

The following matrix summarizes the license substitution rules valid with TIA Portal V17 (and the same scheme applies to V16). The matrix is read column-by-column: each cell lists the HMI device families that the engineering license in that column may configure.

The key takeaway is that WinCC Comfort, WinCC Advanced and WinCC Professional are superset licenses relative to the WinCC Unified Comfort entitlement: the same license key activates both the classic and the Unified HMI engineering features when the optional package is installed.

Prerequisites

Before reconfiguring an engineering station to develop Unified Comfort Panel projects, confirm the following prerequisites.

• TIA Portal V17 installation media. Use the Siemens Online Software Delivery (OSD) download or the latest TIA Portal V17 Update (currently V17 Update 5 or higher at the time of writing) – the Unified Engineering option must be on the same physical or downloaded image as the WinCC Comfort option. The official download entry for TIA Portal V17 is published at Siemens Support Entry 109784440 (TIA Portal V17); the equivalent entry for V16 is Siemens Support Entry 109772803 (TIA Portal V16).
• WinCC Comfort V17 license key. The license is bound to a USB hardware dongle (type A) or to the Automation License Manager (ALM) and must be present on the engineering PC before starting TIA Portal.
• Microsoft Windows 10 / Windows 11 (64-bit). TIA Portal V17 officially supports Windows 10 Enterprise LTSC 2019 / 2021 and Windows 11 Enterprise 21H2 / 22H2. Windows Server 2019 / 2022 is supported for engineering but not for HMI runtime.
• .NET Framework 4.8 and the Visual Studio 2017 / 2019 redistributables bundled in the TIA Portal installer.
• Minimum 16 GB RAM, 50 GB free disk. The Unified Engineering option adds approximately 6 GB to the installed footprint.

Installing the WinCC Unified Engineering Package

The WinCC Unified Engineering option is not installed by default – it must be explicitly enabled during the TIA Portal V17 setup or added later through the Windows Apps & Features → Modify path.

1. Insert the TIA Portal V17 installation media or run Start.exe from the unzipped download folder referenced in Entry 109784440.
2. Select the language and destination directory (default: C:\Program Files\Siemens\Automation\Portal V17).
3. On the Product selection screen, expand SIMATIC WinCC and tick the following components:
   • SIMATIC WinCC Engineering V17
   • SIMATIC WinCC Unified Engineering V17 (this checkbox is the line item that activates the UCP device support)
   • SIMATIC WinCC Unified PC Runtime V17 – required only if you also intend to deploy WinCC Unified on a PC/Server, not for UCP-only projects
4. Accept the license agreement for both the classic and the Unified option packages.
5. Complete the installation. A reboot is required; TIA Portal will not detect the Unified device catalog until the post-install reboot has finished.
6. After the reboot, start TIA Portal and verify under Help → Installed software that the line SIMATIC WinCC Unified Engineering V17 is listed with the expected build number.

Engineering Workflow for Unified Comfort Panels

Once the WinCC Unified Engineering package is installed, the engineering workflow for a Unified Comfort Panel project is identical to the workflow used for a classic Comfort Panel, with the following differences in the project tree.

1. Add new device. In the project tree, choose Add new device → HMI → SIMATIC Unified Comfort Panel and select the UCP variant (for example MTP1500 Unified Comfort). The device is created with the standard Unified screens, faceplates and the Unified RT runtime configuration.
2. Tag / connection configuration. Configure HMI tags exactly as for a Comfort Panel – the tag editor is shared between WinCC Comfort and WinCC Unified. PLC connections are made over S7-1200/1500 symbolic access; classic absolute-address connections are not supported on UCP devices.
3. Screen design. Use the WinCC Unified screen editor. Note that Comfort-style screen objects (for example the older WinCC flexible graphical objects) are not available – only the Unified object set.
4. Compile. Right-click the UCP device → Compile → Software (rebuild all). The compiler will report missing Unified option blocks in the diagnostic pane if the option was not installed; the canonical error message is 0xFFFE0001 – WinCC Unified option is not licensed.
5. Download. TIA Portal checks the engineering version against the panel runtime version during the download dialog (see next section) and rejects incompatible combinations.

Runtime Version Compatibility (RT Unified)

The Unified Comfort Panel runs the WinCC Unified RT runtime image, which has its own versioning independent of TIA Portal. According to the Siemens documentation at TIA Portal Cloud – Basics on version compatibility (RT Unified):

• An installed RT Unified version V17 or higher supports backward compatibility down to projects compiled with TIA Portal V16.
• An installed RT Unified version V17 does not support forward compatibility – a project compiled with TIA Portal V18 cannot be downloaded to a V17 panel.
• TIA Portal performs an automatic compatibility check during the Download to device dialog. If the engineering version exceeds the panel runtime version the dialog is aborted with the message The runtime version on the target device is older than the project version.
• If the project version is older than or equal to the panel runtime version, TIA Portal offers to upgrade the panel runtime image as part of the download (panel must be in transfer mode and reachable on the network).

This means a WinCC Comfort V17 engineering station can download to a UCP panel that runs RT Unified V17 or a UCP panel that still runs the original V16 RT image, but it cannot download to a panel that has been pre-upgraded to V18.

Unified Comfort Panel Hardware Compatibility per ST80 Catalog

The Siemens ST80 catalog (SIMATIC HMI – Human Machine Interface) lists which engineering software versions are authorized to configure each panel family. For the Unified Comfort Panel line introduced with V16, the ST80 matrix specifies WinCC Unified V16 or higher as the supported configuration environment.

The detailed authorization table for SIMATIC HMI is documented at Siemens Support Entry 109768002 – SIMATIC HMI – TIA Portal authorization. Engineers should always re-validate against the latest revision of ST80 before quoting a panel configuration because Siemens extends the matrix with every catalog update.

Verification Procedure Before Device Download

Run the following checks on the engineering station before the first download to a Unified Comfort Panel. Each check resolves one of the most frequent support cases.

1. License visibility. Open TIA Portal → Help → License analysis. The line WinCC Unified Comfort V17 must show the dongle or ALM license as Valid. If only WinCC Comfort V17 is shown, the Unified Engineering package is not installed – return to the installation step.
2. Device catalog. In the Add new device dialog the folder SIMATIC Unified Comfort Panel must be present. If the folder is missing, the catalog cache is stale – delete %AppData%\Siemens\Automation\CatalogCache and restart TIA Portal.
3. Compile clean. A full rebuild of the UCP device must finish with zero errors and zero warnings of severity Error. Common warnings such as unused tag are acceptable but blocking diagnostics must be cleared.
4. Runtime version probe. Open the panel's Control Panel → System → Runtime version and note the V-build. The engineering station must run a TIA Portal version ≥ the panel RT version.
5. Network reachability. From the engineering station, ping the panel's IP address. For PROFINET panels, also confirm that the PG/PC interface in TIA Portal is set to the correct Ethernet adapter.
6. Transfer mode. Put the panel into transfer mode either by tapping Transfer on the loader screen or by setting the rotary selector to Transfer. The panel must display Waiting for transfer.

Troubleshooting Matrix

Field-Proven Caveats

Three corner cases observed in field deployments are worth highlighting because they are not covered in the standard Siemens catalog text.

• Distributed engineering. When a project is opened on a second engineering station that has only the classic WinCC Comfort option installed (for example a colleague without Unified Engineering), the UCP device will open in read-only mode and recompilation will fail. Ensure every station that must modify the UCP device has the Unified Engineering option selected.
• Multiuser server projects. In a TIA Portal multiuser / team engineering server the option set is fixed at server-installation time. Modifying the option set later requires a local-cache invalidation and re-checkout of the UCP device.
• Edge TIA Portal versions. The unified engineering option is bundled in the TIA Portal V17 installer but is a separate checkbox in earlier V16 maintenance updates. Confirm the version of the SIMATIC WinCC Unified Engineering package shown in Help → Installed software matches the TIA Portal version to avoid a mixed-version compile error.

Related Documentation

• Siemens Support Entry 109784440 – TIA Portal V17 Download
• Siemens Support Entry 109772803 – TIA Portal V16 Download
• Siemens Support Entry 109768002 – SIMATIC HMI / TIA Portal authorization (ST80 excerpt)
• TIA Portal Cloud – Basics on version compatibility (RT Unified)