Siemens 6AV6646-0AA21-2AX0 KTP400 Basic

Name: Siemens 6AV6646-0AA21-2AX0 KTP400 Basic
Brand: Siemens
SKU: 6AV6646-0AA21-2AX0
Price: 740.00 EUR
Availability: InStock

€ 740,00

Condition

Clear

SKU: 6AV6646-0AA21-2AX0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6646-0AA21-2AX0 is the KTP400 Basic panel, part of the SIMATIC HMI Basic Panel series from Siemens. This compact operator panel features a 4-inch widescreen TFT display and is designed for straightforward machine-level visualization tasks. It belongs to the entry-level Basic Panel generation, offering a cost-effective solution for simple HMI requirements in automation environments.

The KTP400 Basic panel features a 4" widescreen TFT display with a resolution of 480 x 272 pixels and 64,000 color support. It incorporates both touch operation and 4 configurable function keys for flexible operator interaction. The panel communicates via PROFINET (Ethernet) and is configured using the WinCC Basic engineering software included within the TIA Portal framework. It operates on a 24 V DC supply and supports a project memory of 10 MB, with an operating temperature range of 0 to 50 degrees Celsius.

The KTP400 Basic is widely used in machine-level HMI applications across manufacturing, packaging, food and beverage, and general industrial automation. Its compact 4-inch form factor makes it suitable for integration into control cabinets and machine panels where space is limited. The panel is commonly paired with Siemens S7-1200 and S7-300 PLCs for straightforward process visualization and operator control tasks.

Technical Specifications

Display Size	4 inch widescreen TFT
Display Resolution	480 x 272 px
Display Colors	64,000 colors
Touch Technology	Resistive touch + 4 function keys
Input/Operating Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	PROFINET (1x RJ45 Ethernet)
Project Memory	10 MB
Operating Temperature	0 to 50 °C
Storage Temperature	-20 to 60 °C
Relative Humidity	10 to 90% RH (non-condensing)
IP/Protection Rating	IP65 (front), IP20 (rear)
Dimensions (W x H x D)	155 x 116 x 39 mm
Panel Cutout	138 x 99 mm
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI Basic Panel

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been interrupted.
Check PROFINET cable and RJ45 connector integrity. Verify IP address configuration on both the HMI and PLC. Ensure the PLC is in RUN mode and the network switch or router is operational.
Event ID: 10001: Connection to PLC timed out. The HMI did not receive a response from the controller within the configured timeout period.
Verify network connectivity and PLC operational status. Check for IP address conflicts on the network. Increase the connection timeout value in the WinCC Basic project settings if necessary.
Event ID: 20000: Tag read error. The HMI is unable to read a configured tag or variable from the connected PLC.
Verify that the tag address in the WinCC Basic project matches the actual PLC data block or memory address. Check that the PLC program is running and the relevant data block exists.
Event ID: 40000: Project download error. A fault occurred during project transfer from the engineering PC to the HMI panel.
Ensure the HMI panel is in transfer mode. Verify the Ethernet connection between the engineering PC and the panel. Check that the WinCC Basic project is compiled without errors before initiating the download.
Event ID: 70010: Internal device error or system fault detected on the HMI panel.
Perform a power cycle on the HMI panel. If the fault persists, perform a factory reset via the Start Center menu. If the issue continues, the panel may require service or replacement.
Event ID: 50000: Alarm or event buffer overflow. The number of pending alarms exceeds the buffer capacity of the panel.
Acknowledge and clear active alarms on the HMI. Review the alarm configuration in WinCC Basic to reduce the number of simultaneous alarm triggers or increase the alarm buffer size within project settings.
Event ID: 60000: Firmware update error. An error occurred during a firmware update procedure on the panel.
Restart the firmware update process using the correct firmware version for the KTP400 Basic panel. Ensure a stable power supply and Ethernet connection during the update. Download the correct firmware from the Siemens Industry Online Support portal.

Frequently Asked Questions

What communication interface does the KTP400 Basic (6AV6646-0AA21-2AX0) support?

The KTP400 Basic supports PROFINET communication via a single RJ45 Ethernet port. It does not support PROFIBUS or MPI natively.

Which engineering software is used to configure the KTP400 Basic panel?

The KTP400 Basic is configured using Siemens WinCC Basic, which is included with the TIA Portal software package. It is not compatible with WinCC flexible or older STEP 7 Classic tools.

Which Siemens PLCs are compatible with the KTP400 Basic?

The KTP400 Basic is compatible with Siemens S7-1200 and S7-300/400 PLCs via PROFINET. It can also communicate with S7-1500 PLCs using the appropriate TIA Portal project configuration.

What is the operating voltage of the 6AV6646-0AA21-2AX0?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid damage or instability.

What is the front panel protection rating of the KTP400 Basic?

The front of the KTP400 Basic panel is rated IP65, making it suitable for installation in environments where dust and water jets may be present. The rear of the panel is rated IP20.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check that the supply is within the specified tolerance. Inspect the connector for loose or damaged wiring.

Correct the power supply voltage if out of range. Reseat the power connector. If the supply is confirmed good and the display remains blank, the panel backlight or internal power board may be faulty and the unit should be sent for repair.

HMI panel cannot establish connection to PLC

Verify the PROFINET IP address settings on both the HMI panel and the PLC using TIA Portal. Check the RJ45 cable and network infrastructure for faults. Confirm the PLC is in RUN mode.

Correct any IP address mismatches or conflicts. Replace the Ethernet cable if damaged. Ensure the PLC program is active and the PROFINET device name assigned in TIA Portal matches the panel configuration.

Touchscreen does not respond or responds inaccurately

Check for physical damage or contamination on the touch surface. Verify that the operator is not using gloves that are incompatible with resistive touch technology. Check if the issue is consistent across the entire screen or localized.

Clean the touch surface with a soft, dry cloth. Recalibrate the touchscreen via the Start Center menu on the panel. If calibration does not resolve the issue, the touch foil may be damaged and require replacement.

Project cannot be downloaded to the panel

Confirm the panel is in Transfer mode, accessible via the Start Center. Check the Ethernet connection between the engineering PC and the panel. Verify the TIA Portal project compiles without errors.

Switch the panel to Transfer mode manually via the Start Center. Ensure the PC and panel are on the same network subnet. Recompile the TIA Portal project and reattempt the download. Temporarily disable PC firewall software if the connection is being blocked.

Panel repeatedly restarts or shows a continuous boot loop

Check the 24 V DC supply for voltage drops or instability under load. Inspect the project stored on the panel for corruption. Attempt to access the Start Center during boot by pressing the touch screen during startup.

Stabilize the power supply and ensure adequate current capacity. If the project is corrupted, perform a factory reset via the Start Center and re-download the project from TIA Portal. If the boot loop persists after reset, the panel hardware may require servicing.

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