Siemens 6AV6446-3AA41-3AY3 MP 370

SKU: 6AV6446-3AA41-3AY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA41-3AY3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI Multi Panel series, designed for demanding visualization and operator control tasks in industrial automation environments. This unit features a 12-inch TFT display and operates as a high-performance operator panel within the Siemens SIMATIC HMI product family. It is engineered to provide reliable human-machine interface functionality in process and machine control applications.

The MP 370 (6AV6446-3AA41-3AY3) is equipped with a touch-sensitive screen interface and supports multiple communication protocols including MPI, PROFIBUS DP, and Ethernet, enabling flexible integration into existing Siemens automation architectures. The panel runs on the Windows CE operating system and is compatible with WinCC flexible runtime software for configuration and visualization. It provides onerous memory capacity for project data, recipes, and data logging, and supports USB and CompactFlash interfaces for data transfer and project backup.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and chemical plant environments where a robust and versatile HMI solution is required. Its compatibility with SIMATIC S7 PLCs and support for multiple fieldbus protocols make it suitable for both standalone machine control and networked plant-wide SCADA applications. The panel's industrial-grade construction and wide operating temperature range allow it to function reliably in harsh production environments.

Technical Specifications

Display Size	12 inch
Display Type	TFT color
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45), RS-422/485
Operating System	Windows CE
Memory	12 MB user memory (project)
Data Storage	CompactFlash slot, USB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Rating (Front)	IP65
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI Multi Panel (MP 370)

Common Error Codes & System Events

Event ID: 10000: Connection to the PLC could not be established or has been interrupted.
Check communication cable connections, verify MPI/PROFIBUS address settings, and confirm PLC is powered and in RUN mode.
Event ID: 10001: Communication timeout with the configured controller.
Verify network configuration, check for cable faults, and ensure the PLC address matches the HMI project configuration.
Event ID: 20000: Project download failed or project data is corrupt.
Re-download the project from WinCC flexible, check USB or CompactFlash media integrity, and verify software version compatibility.
Event ID: 40000: System memory low — available user memory is insufficient for the current project.
Reduce project size, remove unused screens or data logs, or transfer archived data to external CompactFlash storage.
Event ID: 50000: Operating system error or runtime software fault detected.
Perform a warm restart of the panel. If the fault persists, perform a factory reset and re-download the project.
Event ID: 60000: Backup battery low or battery failure detected.
Replace the internal backup battery with the correct Siemens replacement part to prevent loss of time/date and retain data settings.
Event ID: 70000: Touch screen calibration error or touch input not responding correctly.
Recalibrate the touch screen via the Control Panel in the Windows CE start menu. Clean the screen surface and check for physical damage.

Frequently Asked Questions

What PLC systems is the Siemens MP 370 (6AV6446-3AA41-3AY3) compatible with?

The MP 370 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. It also supports Ethernet-based communication and can be configured for use with other controllers through WinCC flexible drivers.

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

The MP 370 is configured using Siemens WinCC flexible software. The project is created on a PC and downloaded to the panel via Ethernet, MPI, or USB/CompactFlash.

What is the display size and type on the 6AV6446-3AA41-3AY3?

This unit features a 12-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports up to 256 colors.

Does the MP 370 support recipe management and data logging?

Yes, the MP 370 supports recipe management, data logging, and alarm archiving within the limits of its available user memory and optional CompactFlash storage.

What is the supply voltage for the Siemens MP 370?

The MP 370 operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI panels in industrial cabinet installations.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the power supply output is within tolerance and the connector is fully seated.

Restore correct 24 V DC supply. If voltage is correct but display remains blank, the internal power supply board or backlight inverter may require replacement.

Touch screen does not respond or responds inaccurately

Attempt touch input across different areas of the screen. Check for physical damage, contamination, or a miscalibrated touch controller.

Recalibrate the touch screen through the Windows CE Control Panel. Clean the screen with a soft cloth. If the issue persists, the touch overlay may need replacement.

HMI cannot connect to the PLC

Verify the communication cable type and wiring (MPI, PROFIBUS, or Ethernet). Check that the HMI project settings match the PLC address and network parameters.

Correct any address mismatches in the WinCC flexible project. Replace faulty cables and ensure proper termination resistors are fitted on PROFIBUS networks.

Panel freezes or restarts unexpectedly

Check for overheating by verifying ambient temperature and panel ventilation. Review system event logs for recurring fault codes.

Ensure the operating environment is within the 0–50 °C range. Perform a firmware update if available. If the issue persists, a factory reset followed by project re-download may resolve software corruption.

Project fails to load after download

Check the WinCC flexible version used to create the project against the runtime version installed on the panel. Verify CompactFlash or USB media is not corrupted.

Ensure the WinCC flexible project version matches the panel's runtime version. Reformat the CompactFlash card if corrupted and re-download the project via Ethernet or MPI.

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