KTP400 Basic TIA V14 SP1 Adaptation Failed: USB Recovery Steps

Problem Summary

The Siemens SIMATIC KTP400 Basic (2nd generation) is a 6" mono PROFIBUS/PROFINET HMI panel widely deployed on small machines programmed with TIA Portal. When the runtime image installed on the panel is newer than the TIA Portal engineering version used to compile the HMI project, the engineering download to the device fails with the error Adaptation of target device failed. The two on-panel recovery options exposed by TIA Portal—OS update and Reset to factory settings—typically also become unresponsive, because the same version-gating logic that blocks the project transfer also disables the recovery menus on the loader side.

A typical failure scenario reported in the field is:

• Panel: SIMATIC KTP400 Basic, 2nd generation (article numbers 6AV2 123-2DB03-0AX0, 6AV2 123-2GB03-0AX0, 6AV2 123-2GB33-0AX0 or compatible 2nd generation variants)
• Runtime image currently flashed on the panel: TIA Portal image version 15.x or 16.x
• Engineering station: TIA Portal V14 SP1 (build 14.0.1.0) running on Windows 7 SP1 / Windows 10
• Project compilation target: KTP400 Basic V14 image
• Failure: Overwrite/Adjust ("Überschreiben/Anpassen") dialog appears, then the transfer aborts with Adaptation of target device failed
• Side effect: Online > HMI Device Maintenance > OS Update and Reset to factory settings start, then return to TIA Portal with no progress and no error message

Root Cause Analysis

The KTP400 Basic 2nd generation runs a Windows Embedded Compact 7 (WinEC 7) based runtime. Each TIA Portal major version (V13, V13 SP2, V14, V14 SP1, V15, V15.1, V16, V17, V18, V19) ships a corresponding runtime image, identified by a 4-digit build number, that must be installed on the panel for the compiled project to load. Forward compatibility exists in limited cases (a V15 SP1 panel can usually load projects compiled in TIA V15.0), but the engineering station cannot downgrade the panel runtime and the panel cannot host a project that targets an older major version than its image.

When the panel reports an image version of 15.x and the engineering station is V14 SP1 (14.0.1.0), the TIA Portal transfer utility recognises the conflict, raises the Overwrite/Adjust dialog, and—once confirmed—attempts to map V15 project options to V14 tags. The mapping succeeds at the data structure level, but the underlying WinEC 7 runtime cannot be reversed in-place, and the transfer aborts with the generic Adaptation of target device failed message. The same gating logic disables the on-panel recovery menu options in TIA Portal's HMI Device Maintenance tool, which is why an OS update invoked from within TIA appears to do nothing for several minutes and then returns without progress. The panel itself is in a working state; the engineering station simply refuses to write to it.

Why the On-Panel Recovery Options Do Not Work

Two menu items, normally available from the loader or the control panel, are also gated by the same version-mismatch logic:

1. OS Update from Start > Settings > OP > OS Update on the panel: in newer runtime images, the loader requires that the OS update image being written match the panel's current image major version. A V14 OS image presented to a V15 panel is rejected silently.
2. Reset to Factory Settings from the loader: this is intended to roll back to the factory-delivered image, but on a 2nd generation Basic Panel the loader only reaches the menu items when the runtime is healthy. If the project compiled in TIA V15 has overwritten loader-protected regions, the menu may not be rendered.

The HMI Device Maintenance tool inside TIA Portal suffers from the same restriction. It requests a downgrade of the runtime from V15 to V14, and the panel's transfer server refuses. The TIA Portal side reports no error because the panel simply terminates the transfer channel; the engineering station interprets that as a transient and waits. This is the most confusing aspect of the failure mode: no error, no progress, no information.

Solution: USB Recovery (Reset to Factory) Mode

Siemens documents a recovery procedure for 2nd generation Basic Panels (KTP400 Basic, KTP600 Basic, KTP700 Basic, KTP900 Basic, KTP1200 Basic, KTP400 Comfort, and related 2nd generation variants) that forces the panel to re-flash its runtime from files placed on a USB stick. The procedure is described in detail in the Siemens FAQ entry 109751443 – "USB recovery (reset to factory) for 2nd generation Basic Panels" and in the panel-specific operating instructions shipped with each device. A related entry covering OS image sources is Siemens FAQ 109769561 – "Basic Panels 2nd Generation: Recovery / OS image sources".

The recovery path bypasses the version-gating logic in both the TIA Portal transfer utility and the on-panel menus, restoring the panel to the factory-delivered runtime image (the version of the image at the time of manufacture). Once reset, the panel can be reloaded with an OS update matching the TIA Portal version used for the project, and the project download completes without the Adaptation of target device failed error.

Prerequisites

Before starting the recovery, confirm the following hardware, software, and environmental conditions. Each item is a documented requirement from Siemens and a frequent source of failed recovery attempts in the field.

1. USB stick specifications
   • USB specification: USB 2.0 or lower. USB 3.0 sticks (even when physically compatible) are not reliably recognized by the 2nd generation Basic Panel USB host controller. Industrial-grade USB 2.0 sticks from SanDisk, Kingston, or Verbatim are recommended.
   • File system: FAT32 only. NTFS, exFAT, and any Linux file system will cause the panel to ignore the stick silently.
   • Capacity: 1 GB up to 32 GB is the practical envelope. Larger sticks formatted as FAT32 with a non-standard sector size may not be recognized.
   • Partition: ensure the stick has a single active primary partition. Multi-partition sticks, sticks with hidden recovery partitions, and sticks with an EFI System Partition are rejected.
   • Write protection: switches on the stick must be in the unlocked position. Hardware-encrypted sticks (e.g. IronKey) are not supported.
2. Recovery image files
   • Source: the Support folder of the matching TIA Portal installation DVD, or the Siemens Online Support download portal under entry 109769561.
   • Files: extract the contents of the recovery ZIP directly to the root of the USB stick. The recovery looks for specific filenames (typically SIMATIC_HMI_BasPnl.img, recovery.txt, or panel-specific binaries for KTP400/KTP600/KTP700). Leaving them inside a subfolder, or leaving both the ZIP and the extracted files side by side, is a common cause of a silent no-op.
   • Match: the recovery image must be for the exact panel variant identified by the article number (MLFB) printed on the back of the device. A KTP700 recovery image flashed onto a KTP400 will either fail the signature check or brick the loader.
3. Power and cabling
   • 24 V DC supply stable; recovery writes flash memory and is sensitive to undervoltage. Use a regulated industrial supply capable of at least 1.5 A continuous per panel, with < 5 % ripple.
   • Verify > 21 V at the panel terminals under load before starting. A weak supply that passes normal boot can corrupt the flash during the sustained write phase.
   • Ethernet or PROFINET cable not required for USB recovery, but the panel must be physically accessible (you need to operate the touch screen and the power terminals).
4. Engineering station
   • ProSave / TIA Portal available for the post-recovery OS update step.
   • Locally installed ProSave language variant must match the panel's commissioning locale for file transfer dialogs; a Chinese-language ProSave is fully functional with English and German panels for the actual data transfer, but some dialog strings appear in Chinese. This is cosmetic and does not block recovery.

Step-by-Step Recovery Procedure

1. Power down the panel. Remove the 24 V supply. Wait at least 10 seconds for the internal supercap-backed SRAM to fully discharge (the touch controller latches the last touch state for a short period, and the loader's boot flag must reset).
2. Insert the prepared USB stick containing the extracted Siemens recovery image into the panel's USB host port (typically on the rear of the device, behind a small cover labelled "USB").
3. Apply 24 V DC power to the panel. Watch the screen carefully during boot. The standard loader should detect the recovery signature on the USB stick and display a Start recovery button within 10 to 30 seconds, depending on the panel variant. The Siemens splash screen is shown first, then a short black interval, then the recovery menu.
4. Tap Start recovery on the touch screen. Confirm the warning dialog that follows ("All data on the panel will be erased. Continue?"). The recovery process erases the existing flash image and writes the factory runtime; the screen may show a progress bar and may go blank for one to three minutes. Do not remove power during this interval.
5. Wait for the panel to reboot automatically. The first boot after recovery is significantly slower than a normal boot (typically 60 to 90 seconds) as the panel re-initializes the file system and rebuilds the registry. The familiar start screen or a blank desktop appears when complete.
6. Touch-calibrate the panel when prompted (four corner targets). Skipping this step on a freshly recovered panel results in a misaligned touch surface and is a frequent source of post-recovery operator complaints.
7. Remove the USB stick only after the panel has fully booted into the recovery runtime. Removing the stick earlier is safe but unnecessary.
8. Re-run an OS update from TIA Portal: connect to the panel via PROFINET or Ethernet, open Online > HMI Device Maintenance > OS Update, and select the OS image matching your TIA Portal version. This step raises the runtime from the factory default to your project's TIA version.
9. Compile and download the HMI project. The download should now complete without the Adaptation of target device failed error.

Version Compatibility Matrix

Before assuming a recovery is required, verify the engineering-to-runtime relationship. The matrix below reflects the documented forward and downward compatibility behavior of the KTP400 Basic (2nd generation) family across the major TIA Portal versions.

KTP400 Basic Hardware and Image Identification

To select the correct recovery image, identify the panel's exact variant. The article number (MLFB) is printed on the rear label and follows the Siemens naming convention. Common KTP400 Basic 2nd generation variants include:

To read the currently installed image version from a working panel, open the loader menu during boot (touch the small black arrow at the bottom of the screen during the Siemens splash) and navigate to Image > Version. The reported build number (e.g. 14.0.1.0) identifies the TIA Portal major version and service pack that produced the runtime.

Verifying Recovery Success

After the panel has booted into the recovery runtime, run the following checks before resuming normal project loading.

1. Loader version: open the loader menu on the panel. The Image version line should report the factory version (typically V13.x for older deliveries or V14.x for newer deliveries). If the version still reports V15.x, the recovery did not take and the USB stick was not detected at boot.
2. Network connectivity: from TIA Portal, run Online > Accessible Nodes. The panel should appear with its configured PROFINET name and IP address. If the panel is unreachable, the PROFINET name and IP have reverted to factory defaults (typically PN-IO and 0.0.0.0 with DHCP). Re-assign the IP from the loader or from the panel's Settings > Network menu.
3. Touch calibration: tap the four corner calibration targets when prompted. Skipping this step on a freshly recovered panel results in a misaligned touch surface and is a frequent source of post-recovery operator complaints.
4. OS update: in TIA Portal, Online > HMI Device Maintenance > OS Update and select the OS image matching your engineering version. The update takes 3 to 6 minutes; the panel reboots twice during the process. Do not interrupt.
5. Project download: compile the project in TIA Portal and download. Verify that the Adaptation of target device failed error no longer appears and that the start screen loads on the panel.
6. Recipe and log persistence: confirm that any data the application stores on the panel (recipes, alarms, audit trails) is intact. The USB recovery erases the user partition, so any pre-existing recipe data must be reloaded from a backup.

Troubleshooting Matrix

Locale and ProSave Considerations

The presence of a Chinese-language ProSave installation on the engineering station does not block USB recovery. ProSave is only invoked for the post-recovery OS update and project transfer; the recovery itself runs entirely on the panel firmware. Two practical effects of a locale-mismatched ProSave to be aware of:

• Dialog language: confirmations and progress dialogs render in Chinese. The functional behavior of the transfer is unchanged.
• File path encoding: if the project archive paths contain non-ASCII characters, ProSave may fail to find them with a generic "file not found" error. Keep the project path in pure ASCII (e.g. C:\Projects\KTP400\) when working with a non-matching locale ProSave.

For multi-language commissioning teams, install the English (United States) ProSave from the TIA Portal DVD in parallel with the Chinese variant. The two ProSave installations coexist on the same machine and the active language is selected from the ProSave Settings > Language menu without requiring a Windows locale change. This avoids the cosmetic Chinese dialogs in mixed teams while keeping the Chinese ProSave available for projects that were originally commissioned in a Chinese environment.

Backup and Restore Considerations

The USB recovery erases the user partition, including any data the application has stored on the panel. Before starting the recovery, perform the following backups if the panel is still partially accessible:

1. Project source: archive the TIA Portal project to a ZIP file from the project tree (Project > Archive). This is independent of the panel and is the authoritative source for the project.
2. Recipes: from the panel's Settings > Recipes menu, export all recipe data to the USB stick or via ProSave (File > Recipes > Export). The export file uses a .csv format and can be re-imported after the OS update.
3. Audit trail and alarm logs: if the project uses the audit or alarm logging functions, export the database files via ProSave. The default location is \Storage Card SD\Logs\ on the panel.
4. PROFINET name and IP: photograph the loader Settings > Network screen so the configuration can be re-entered after the reset. The PROFINET device name is case-sensitive and must match the TIA Portal project configuration exactly.

Timing and Electrical Budget

Plan a service window of at least 20 minutes for the full recovery and OS update cycle. The table below breaks down the expected time at each stage.

Peak current draw during the flash write can reach 1.2 A on a KTP400 Basic. A 24 V supply rated for 1.5 A continuous with < 5 % ripple and a short-circuit capacity above 3 A is recommended to ride through the inrush at the start of the flash write.

Field-Proven Best Practices

• Keep a dedicated, pre-formatted FAT32 USB stick with the recovery images for each panel variant in the cabinet. Label the stick with the panel MLFB and the TIA version the image targets.
• Document the panel's TIA Portal image version in the project archive (e.g. as a project property or in the device description). This makes it possible to identify a version mismatch before attempting a download.
• When upgrading a fleet of panels from V14 to V15, perform the OS update in TIA Portal before downloading the new project. A V14 panel loaded with a V15 project will exhibit the same Adaptation of target device failed error in reverse, and the recovery path is identical.
• Avoid USB sticks with hardware encryption or write protection switches. The panel cannot dismiss the write-protect sensor.
• If the panel is inaccessible (e.g. mounted behind a fixed enclosure), plan for a service window before starting the recovery. The procedure requires physical interaction with the touch screen and the USB port.
• Verify the panel's PROFINET name before and after recovery. A factory reset erases the name and the IP, and the panel will not reconnect to the PROFINET network until both are re-assigned.
• After the OS update and project download, run a full project transfer test from TIA Portal (Online > Compile > Software (rebuild all)) to confirm the runtime is now consistent with the engineering version.

FAQ