Siemens 6AV6646-2AB21-2AX0 SIMATIC KTP400 Basic

Name: Siemens 6AV6646-2AB21-2AX0 SIMATIC KTP400 Basic
Brand: Siemens
SKU: 6AV6646-2AB21-2AX0
Price: 854.00 EUR
Availability: InStock

€ 854,00

Condition

Clear

SKU: 6AV6646-2AB21-2AX0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6646-2AB21-2AX0 is a SIMATIC KTP400 Basic Panel, part of the SIMATIC Basic Panel series from Siemens. It is a compact 4-inch key and touch-operated HMI panel designed for straightforward machine-level visualization and operator control tasks. This unit belongs to the entry-level HMI segment within the SIMATIC HMI portfolio, offering a balance of functionality and cost-effectiveness for simple automation applications.

The KTP400 Basic features a 4-inch TFT widescreen display with a resolution of 480 x 272 pixels and 64,000 colors, providing clear and readable process visualization. It combines touch operation with 4 configurable function keys, allowing flexible operator interaction. The panel communicates via a PROFINET interface, enabling seamless integration into modern Ethernet-based automation networks. It is configured using the SIMATIC WinCC Basic engineering software included with TIA Portal, and supports a user memory of 10 MB for project data.

The KTP400 Basic is widely used in manufacturing, packaging, food and beverage, and general machine-building industries where compact and cost-efficient HMI solutions are required. Its small form factor makes it suitable for integration into control cabinets and machine panels with limited space. The PROFINET connectivity ensures straightforward communication with SIMATIC S7-1200 and S7-1500 PLCs, making it a natural fit for TIA Portal-based automation projects.

Technical Specifications

Display Size	4 inch
Display Resolution	480 x 272 pixels
Display Colors	64,000 colors
Display Type	TFT widescreen
Touch Technology	Resistive touch screen
Function Keys	4 configurable function keys
Input/Operating Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	PROFINET (RJ45)
User Memory	10 MB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP/Protection Rating	IP65 (front), IP20 (rear)
Dimensions (W x H x D)	155 x 116 x 33 mm
Panel Cutout	138 x 99 mm
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Configuration error: The project loaded on the panel contains configuration errors or is incompatible with the panel type.
Recompile and re-download the project from TIA Portal. Verify that the correct panel type and firmware version are selected in the project settings.
Event ID: 10001: Communication error: The HMI panel cannot establish a connection to the configured PLC.
Check PROFINET cable connections and network settings. Verify that the PLC IP address configured in the HMI project matches the actual PLC IP address. Check that the PLC is in RUN mode.
Event ID: 20000: Tag read error: A process tag cannot be read from the PLC, typically due to an incorrect address or data type mismatch.
Verify the tag address and data type in the HMI project against the PLC program. Recompile and download the updated project.
Event ID: 20001: Tag write error: A write operation to a PLC tag has failed, possibly due to address mismatch or PLC write protection.
Check the tag address configuration in TIA Portal. Ensure the PLC is not in a protected or read-only state. Verify network connectivity.
Event ID: 40000: System memory low: Available user memory on the panel is critically low, which may affect panel performance.
Reduce the project size by optimizing graphics, removing unused tags, or reducing alarm history buffer size. Re-download the project.
Event ID: 50000: Firmware update error: A firmware update process has failed or was interrupted.
Retry the firmware update using ProSave or TIA Portal. Ensure stable power supply during the update process and verify the correct firmware version for this panel type.
Event ID: 60000: Backup/restore error: A project backup or restore operation could not be completed successfully.
Check the integrity of the backup file. Ensure sufficient memory is available on the panel. Retry the operation using ProSave or TIA Portal.

Frequently Asked Questions

Which PLCs are compatible with the KTP400 Basic panel?

The KTP400 Basic is primarily designed for use with SIMATIC S7-1200 and S7-1500 PLCs via PROFINET. It can also communicate with S7-300 and S7-400 PLCs using the appropriate protocol settings in TIA Portal.

What engineering software is required to configure the 6AV6646-2AB21-2AX0?

This panel is configured using SIMATIC WinCC Basic, which is included with the TIA Portal engineering framework. A compatible version of TIA Portal must be used to create, compile, and download projects to the panel.

Does the KTP400 Basic support recipe management and alarm logging?

The KTP400 Basic supports basic alarm logging and simple recipe functions within the limitations of its 10 MB user memory. Advanced data logging and recipe management features are available on higher-tier SIMATIC Comfort Panels.

What is the supply voltage for the 6AV6646-2AB21-2AX0?

The panel requires a 24 V DC power supply, typically connected via the rear terminal connector. The permissible voltage range is 19.2 V DC to 28.8 V DC.

Can the KTP400 Basic be operated in portrait orientation?

The KTP400 Basic is designed for landscape orientation. While the display can be rotated in software configuration, the panel housing and mounting are optimized for horizontal landscape installation.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals on the rear of the panel. Measure voltage at the connector to confirm supply is within the 19.2–28.8 V DC range.

Restore correct supply voltage if out of range. If voltage is correct but display remains blank, perform a factory reset by holding the appropriate key combination during boot. If the panel still does not respond, the internal power supply or backlight may require replacement.

HMI panel cannot connect to PLC after project download

Verify the IP address assigned to the panel and the IP address of the PLC configured in the TIA Portal project. Use a PC to ping both devices on the network to confirm connectivity.

Correct any IP address mismatches in the TIA Portal project and re-download. Ensure both devices are on the same subnet. Replace the PROFINET cable if physical connectivity is suspected to be faulty.

Touchscreen does not respond or responds inaccurately

Check for physical damage or contamination on the touch surface. Attempt to recalibrate the touchscreen through the panel's Start Center settings menu.

Clean the touch surface with a soft, dry cloth. Perform a touchscreen calibration via the Start Center. If inaccuracy persists after calibration, the resistive touch panel overlay may need to be replaced.

Project download fails from TIA Portal

Check the USB or PROFINET connection between the engineering PC and the panel. Verify that the firmware version on the panel is compatible with the TIA Portal project version.

Update the panel firmware to the version required by the TIA Portal project using ProSave. Ensure the correct communication interface is selected in TIA Portal during the transfer. Restart both the panel and TIA Portal and retry the download.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file on the panel or a hardware fault. Attempt to access the Start Center during boot by pressing and holding the touch area at startup.

From the Start Center, delete the existing project and re-download a freshly compiled project from TIA Portal. If the boot loop continues without a project loaded, a factory reset or hardware service may be required.

Condition	Repair, Used, Refurbished, New in box (sealed)