Siemens 6AV6446-1AA41-1AA3 SIMATIC MP 370

Name: Siemens 6AV6446-1AA41-1AA3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA41-1AA3
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-1AA41-1AA3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA41-1AA3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI Multi Panel series, manufactured by Siemens. It is a high-performance operator panel designed for demanding visualization and control tasks in industrial automation environments. The MP 370 features a 12-inch TFT display and is part of the broader SIMATIC HMI product line, which integrates seamlessly with Siemens SIMATIC PLCs and automation systems.

The 6AV6446-1AA41-1AA3 variant is equipped with a 12-inch STN/TFT color display with a resolution of 640 x 480 pixels (VGA), supporting 256 colors. It provides multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling flexible integration into existing network architectures. The panel runs on WinCC flexible runtime software and offers onboard memory for project storage, along with support for CompactFlash cards for extended data storage. The unit operates on a 24 V DC supply and is rated to IP65 at the front panel, ensuring protection against dust and water ingress in industrial environments.

The SIMATIC MP 370 is widely used in manufacturing, automotive, food and beverage, chemical processing, and water treatment industries. Its robust construction and versatile communication capabilities make it suitable for machine-level HMI applications where reliable operator interaction with SIMATIC S7-300 and S7-400 PLCs is required. The panel is particularly well-suited for applications demanding a larger display area with multi-functionality, including recipe management, trend displays, and alarm logging.

Technical Specifications

Display Size	12 inch
Display Resolution	640 x 480 pixels (VGA)
Display Colors	256 colors
Display Type	TFT color
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
IP/Protection Rating	IP65 (front panel), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Memory	12 MB user memory, CompactFlash card slot
Series/Product Family	SIMATIC HMI Multi Panel MP 370
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Connection to PLC lost or communication timeout on configured connection
Check MPI/PROFIBUS/Ethernet cable connections and network settings. Verify PLC is powered and running. Check configured communication parameters in WinCC flexible project.
Event ID: 10001: Connection to PLC established after previous failure
Informational event. No action required. Monitor for recurring disconnections which may indicate network instability.
Event ID: 20000: Tag read error — value of a configured tag could not be read from the PLC
Verify the tag address exists in the PLC program. Check communication connection status. Ensure the PLC data block or memory area is accessible.
Event ID: 40000: Device restart — panel has been restarted
Informational event. If unexpected, check 24 V DC power supply stability and wiring. Investigate potential power dips or surges.
Event ID: 50001: Project loading error — runtime project could not be loaded from memory
Re-transfer the WinCC flexible project to the panel using ProTool or WinCC flexible engineering software. Check CompactFlash card integrity if project is stored externally.
Event ID: 60000: System memory low — available runtime memory is insufficient
Reduce project size, limit number of active screens or logged tags. Archive historical data and clear logs. Consider optimizing the WinCC flexible project.
Event ID: 70010: Alarm buffer overflow — alarm log is full and older entries are being overwritten
Acknowledge and archive pending alarms. Increase alarm buffer size in WinCC flexible project settings or implement regular alarm archiving.

Frequently Asked Questions

What communication interfaces does the 6AV6446-1AA41-1AA3 support?

The MP 370 supports MPI, PROFIBUS DP, Ethernet (TCP/IP), and RS-422/485 serial interfaces, allowing connection to a wide range of Siemens SIMATIC PLCs and third-party controllers.

Which engineering software is used to program and configure this panel?

The SIMATIC MP 370 is configured using Siemens WinCC flexible (or ProTool for older projects). Projects are transferred to the panel via Ethernet, MPI, or USB/CompactFlash card.

Is this panel compatible with SIMATIC S7-300 and S7-400 PLCs?

Yes, the MP 370 is fully compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, and also supports S7-200 via a point-to-point connection.

What is the operating voltage for the 6AV6446-1AA41-1AA3?

The panel operates on a 24 V DC supply. Ensure the power supply can deliver sufficient current, as the unit consumes up to 30 W.

What is the front panel protection rating of this HMI?

The front panel of the MP 370 is rated IP65, providing full protection against dust ingress and protection against low-pressure water jets, making it suitable for washdown-adjacent industrial environments.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check internal fuse if accessible. Observe whether any LED indicators illuminate on the unit.

Verify and restore correct 24 V DC supply voltage. Replace any blown internal fuse. If the backlight is faulty but the panel is otherwise operational, the backlight inverter or display assembly may require replacement.

Panel displays 'No connection to PLC' or communication errors at startup

Check physical cable connections on the MPI, PROFIBUS, or Ethernet port. Verify network address settings on both the panel and the PLC match the configured project parameters.

Re-seat communication cables and verify correct cable type is used (e.g., PROFIBUS-specific cable for DP connections). Correct any address mismatches in the WinCC flexible project and re-transfer the project to the panel.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen via the panel's Control Panel settings accessible during startup. Check for physical damage or contamination on the screen surface.

Perform a touchscreen recalibration through the SIMATIC HMI Control Panel. Clean the screen surface with a soft, dry cloth. If calibration fails repeatedly, the touchscreen overlay or controller board may require replacement.

Panel repeatedly reboots or fails to load the runtime project

Check the 24 V DC supply for voltage dips or instability under load. Inspect the CompactFlash card for errors or corruption. Attempt to boot the panel into Transfer mode to bypass the project.

Stabilize the power supply and ensure adequate current capacity. Replace the CompactFlash card if corrupted and re-transfer the WinCC flexible project. If rebooting persists without a project loaded, the panel firmware may need to be updated or the unit may require repair.

Panel enters Transfer mode unexpectedly on every startup

This typically occurs when no valid runtime project is stored on the panel, or the startup mode is configured to always start in Transfer mode.

Transfer a valid WinCC flexible runtime project to the panel. In the panel's Control Panel, set the startup mode to 'Start project' rather than 'Transfer'. Ensure the project is correctly saved to internal flash or CompactFlash.

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