Siemens 6AV6646-1BA24-0AA1 SIMATIC KTP400 Basic

Name: Siemens 6AV6646-1BA24-0AA1 SIMATIC KTP400 Basic
Brand: Siemens
SKU: 6AV6646-1BA24-0AA1
Price: 943.00 EUR
Availability: InStock

€ 943,00

Condition

Clear

SKU: 6AV6646-1BA24-0AA1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6646-1BA24-0AA1 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 visualization and operator control tasks. The unit combines a resistive touchscreen with four dedicated function keys, providing flexible input options for machine-level operation.

The KTP400 Basic features a 4-inch TFT display with a resolution of 480 x 272 pixels and supports up to 64,000 colors, delivering clear process visualization. It communicates via a PROFINET interface (RJ45), enabling direct integration with Siemens S7-1200 and S7-1500 PLCs as well as other PROFINET-capable controllers. The panel is configured using WinCC Basic (TIA Portal) and supports a project memory of 10 MB. It operates on a 24 V DC supply and is rated IP65 on the front face, making it suitable for panel-mount installations in industrial environments.

The KTP400 Basic is widely used in machine building, packaging, material handling, and small-scale process automation where a compact, cost-effective HMI solution is required. Its PROFINET connectivity and TIA Portal integration make it a natural fit for systems already using Siemens S7-1200 or S7-1500 controllers. The panel's compact form factor and front-face IP65 protection make it suitable for mounting in control cabinet doors and operator panels in light industrial and manufacturing environments.

Technical Specifications

Display Size	4 inch
Display Type	TFT
Display Resolution	480 x 272 pixels
Display Colors	64,000 colors
Touch Technology	Resistive touchscreen
Function Keys	4
Input Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	PROFINET (RJ45)
Project Memory	10 MB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cULus
Configuration Software	WinCC Basic (TIA Portal)
Compatible Controllers	S7-1200, S7-1500, PROFINET-capable PLCs

Common Error Codes & System Events

Event ID: 10000: Connection to the PLC has been interrupted or cannot be established.
Check PROFINET cable and RJ45 connector integrity. Verify PLC IP address configuration matches the HMI connection settings in TIA Portal. Ensure the PLC is in RUN mode.
Event ID: 10001: Communication error: The HMI panel cannot reach the configured PLC address.
Verify IP address and subnet mask settings on both the HMI and PLC. Check network switch or direct cable connection. Ping the PLC from the HMI network segment to confirm reachability.
Event ID: 20000: Tag read/write error: A configured tag cannot be read from or written to the PLC.
Check that the tag address in WinCC Basic matches the actual data block or memory address in the PLC program. Ensure the PLC program is running and the relevant data blocks are not write-protected.
Event ID: 40000: Project download failed or project data is corrupted on the panel.
Re-download the project from TIA Portal using the correct transfer settings. Ensure the WinCC Basic project version is compatible with the panel firmware version. Update panel firmware if necessary.
Event ID: 70010: Panel operating system or firmware error detected during startup.
Perform a factory reset via the panel's Start Center (loader) menu. Re-download the project and update firmware to the latest compatible version using TIA Portal or Automation Tool.
Event ID: 50000: Alarm buffer overflow: The number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear active alarms on the HMI. Review the alarm configuration in WinCC Basic to ensure alarm limits and triggers are correctly set to avoid excessive alarm generation.
Event ID: 60000: Backup/restore error: A project backup or restore operation has failed.
Ensure sufficient free memory on the panel. Use a compatible SD card or USB medium if applicable. Re-initiate the backup or restore process from the Start Center menu.

Frequently Asked Questions

Which PLCs are compatible with the KTP400 Basic (6AV6646-1BA24-0AA1)?

The KTP400 Basic communicates via PROFINET and is primarily designed for use with Siemens S7-1200 and S7-1500 PLCs. It can also connect to other PROFINET-capable controllers supported by WinCC Basic in TIA Portal.

What software is required to configure and program this HMI panel?

The KTP400 Basic is configured exclusively using WinCC Basic, which is included with TIA Portal. It is not compatible with WinCC flexible or older STEP 7 configuration tools.

What is the front-face protection rating of the KTP400 Basic?

The front face of the KTP400 Basic is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for panel door mounting in industrial environments.

Does the KTP400 Basic support recipe or data logging functions?

The KTP400 Basic supports basic recipe management and limited data logging functions within the constraints of WinCC Basic. Advanced logging and trending features available in higher-tier panels are not available on this Basic series panel.

What is the supply voltage for the 6AV6646-1BA24-0AA1?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel typically consumes around 4.5 W during normal operation.

Troubleshooting

Display remains blank after power is applied

Check that 24 V DC is present at the power supply terminals on the rear of the panel using a multimeter. Verify polarity is correct. Observe whether the backlight illuminates briefly at startup.

If no voltage is present, check the power supply and wiring. If voltage is correct but the display remains blank, attempt a firmware recovery by connecting via TIA Portal and re-downloading the project. If the backlight is faulty, the panel may require hardware repair or replacement.

HMI shows 'Connecting…' and cannot establish communication with the PLC

Verify the PROFINET cable is securely connected to the RJ45 port on the panel. Check the IP address, subnet mask, and device name configured in TIA Portal match the actual PLC settings. Use a network scanner to confirm the PLC is visible on the network.

Correct any IP address or device name mismatches in TIA Portal and re-download the HMI project. Replace the PROFINET cable if physical damage is suspected. Ensure the PLC is in RUN mode and the PROFINET interface is enabled.

Touchscreen does not respond or registers incorrect touch positions

Clean the touchscreen surface and check for any physical damage or contamination on the resistive touch layer. Test touch response in the Start Center (loader) menu to determine if the issue is panel-level or project-level.

Perform a touchscreen calibration from the Start Center menu if the option is available. If the touchscreen is unresponsive at the hardware level, the panel front assembly may need replacement. Avoid using sharp objects on the resistive touch surface.

Project download from TIA Portal fails or times out

Check the Ethernet connection between the engineering PC and the HMI panel. Verify the panel is in Transfer mode (accessible via the Start Center). Confirm that the TIA Portal project WinCC Basic version is compatible with the panel firmware version.

Switch the panel to Transfer mode manually via the Start Center. Update the panel firmware to match the TIA Portal version if a version mismatch exists. Disable any firewall or antivirus software on the PC that may be blocking the TIA Portal transfer connection.

Alarms are not displayed on the HMI even though fault conditions exist in the PLC

Check the alarm configuration in WinCC Basic to verify that alarm tags are correctly mapped to the corresponding PLC addresses. Confirm that the PLC program is setting the correct bit or value that triggers the alarm.

Correct any tag address mismatches in the WinCC Basic alarm configuration and re-download the project. Verify PLC logic is functioning as expected using the TIA Portal online monitor. Ensure the alarm view or alarm window object is correctly placed and configured on the relevant HMI screen.

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