Siemens 6AV6646-1BA20-0AA1 SIMATIC KTP400 Basic

Name: Siemens 6AV6646-1BA20-0AA1 SIMATIC KTP400 Basic
Brand: Siemens
SKU: 6AV6646-1BA20-0AA1
Price: 775.00 EUR
Availability: InStock

€ 775,00

Condition

Clear

SKU: 6AV6646-1BA20-0AA1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6646-1BA20-0AA1 is a SIMATIC KTP400 Basic panel, part of the Basic Panel 2nd Generation 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 communicates with SIMATIC PLCs and is configured using the TIA Portal engineering framework.

The KTP400 Basic features a 4.3-inch widescreen TFT display with a resolution of 480 x 272 pixels and 64,000 colors, providing clear process visualization. It combines resistive touch input with 4 configurable function keys for flexible operator interaction. The panel supports PROFINET as its primary communication interface and includes 10 MB of user memory. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The SIMATIC KTP400 Basic is widely used in small to medium-scale machine automation across industries such as packaging, material handling, food and beverage, and general manufacturing. Its compact form factor and straightforward configuration via TIA Portal make it suitable for applications where a cost-effective, reliable HMI solution is required without the need for advanced panel computing capabilities. It is typically mounted in control cabinet doors or operator panels.

Technical Specifications

Display Size	4.3 inch
Display Resolution	480 x 272 pixels
Display Colors	64,000 (16-bit)
Display Type	TFT widescreen
Touch Technology	Resistive touch
Function Keys	4 configurable function keys
Input/Operating Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	PROFINET (RJ45, 10/100 Mbit/s)
User Memory	10 MB
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC Basic Panel 2nd Generation

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check the PROFINET cable and RJ45 connector integrity. Verify the IP address configuration of both the panel and the PLC. Ensure the PLC is in RUN mode and the network switch or router is operational.
Event ID: 10001: Connection to the PLC was established but subsequently lost during operation.
Check for loose or damaged PROFINET cables. Verify network topology and switch functionality. Review PLC program for communication watchdog settings and adjust if necessary.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured tag from the PLC.
Verify that the tag address configured in TIA Portal matches the actual PLC data block or memory address. Check that the PLC program contains the referenced variable and that the data type matches.
Event ID: 20001: Tag write error. The HMI panel is unable to write a value to a configured PLC tag.
Check that the target PLC address is not write-protected. Verify data type compatibility between the HMI tag and the PLC variable. Confirm the PLC is in a state that allows external writes.
Event ID: 40000: Project download error or project data corruption detected on the panel.
Re-download the HMI project from TIA Portal to the panel. If the error persists, perform a factory reset of the panel and re-download the project. Check TIA Portal project for configuration errors before downloading.
Event ID: 50000: Internal device error or hardware fault detected within the HMI panel.
Cycle power to the panel. If the fault persists after restart, check the 24 V DC supply voltage for stability. If the error continues, the panel may require repair or replacement.
Event ID: 60000: System memory or user memory capacity exceeded on the HMI panel.
Review the HMI project in TIA Portal and reduce the number of screens, images, or data logs to fit within the 10 MB user memory limit. Re-download the optimized project to the panel.

Frequently Asked Questions

What communication interface does the KTP400 Basic 6AV6646-1BA20-0AA1 support?

The KTP400 Basic supports PROFINET via a single RJ45 interface operating at 10/100 Mbit/s. It does not natively support PROFIBUS or MPI without additional hardware.

Which engineering software is required to configure this panel?

The SIMATIC KTP400 Basic must be configured using Siemens TIA Portal (WinCC Basic or higher). It is not compatible with the older WinCC flexible software.

Is the KTP400 Basic compatible with SIMATIC S7-1200 and S7-1500 PLCs?

Yes, the KTP400 Basic is fully compatible with SIMATIC S7-1200 and S7-1500 PLCs via PROFINET. It can also communicate with S7-300 and S7-400 PLCs that have a PROFINET interface.

What is the front panel protection rating of the 6AV6646-1BA20-0AA1?

The front face of the KTP400 Basic is rated IP65, providing full protection against dust ingress and protection against low-pressure water jets. The rear of the unit is rated IP20.

Can the KTP400 Basic panel be used for recipe management or data logging?

The KTP400 Basic supports basic recipe management and data logging functions within the constraints of its 10 MB user memory. The number of recipes and log entries is limited compared to higher-tier Comfort panels.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Verify polarity is correct. Check if the panel emits any startup sounds or LED activity indicating internal power is present.

Ensure the 24 V DC supply is stable and within the specified tolerance. If the supply is correct and the display remains blank, the panel's internal backlight or power supply board may have failed and the unit should be sent for repair or replacement.

HMI panel shows 'No connection to PLC' or communication alarm on screen

Check the PROFINET cable between the panel and the PLC or network switch. Verify the IP address and subnet mask configured in TIA Portal match the panel's actual network settings. Ping the PLC from a PC on the same network to confirm PLC availability.

Replace or reseat the PROFINET cable. Correct any IP address mismatches in TIA Portal and re-download the project. Ensure the PLC is powered and in RUN mode. If a network switch is used, verify the switch port is active.

Touch input is inaccurate or unresponsive

Check the display surface for contamination, moisture, or physical damage. Determine if the issue is consistent across the entire screen or limited to specific zones, which may indicate a damaged touch layer.

Clean the display surface with a soft, dry cloth. If moisture ingress is suspected, allow the panel to dry thoroughly. Recalibrate the touch screen through the panel's operating system settings if a calibration option is available. If the touch layer is physically damaged, the panel requires hardware repair.

Project download from TIA Portal fails or times out

Verify the PC running TIA Portal and the HMI panel are on the same network subnet. Check that no firewall or antivirus software is blocking the TIA Portal communication. Confirm the correct panel IP address is set in the TIA Portal project properties.

Temporarily disable firewall software on the engineering PC during download. Ensure the panel is in transfer mode before initiating the download. If the download continues to fail, perform a factory reset on the panel via the Start Center menu and retry the download.

Panel repeatedly restarts or enters a boot loop after project download

The downloaded project may contain configuration errors or may exceed the panel's memory capacity. Check TIA Portal for compilation warnings or errors before downloading.

In TIA Portal, perform a full project compilation and resolve all errors and warnings. Reduce project size if memory limits are exceeded. Perform a factory reset on the panel, then re-download the corrected project. If the boot loop persists, the panel's firmware may need to be updated using the Siemens ProSave tool.

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