Siemens 6AV6446-3AA41-1AY3 MP 370

€ 1.995,00

SKU: 6AV6446-3AA41-1AY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA41-1AY3 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 panel features a 12.1-inch TFT color display and is part of Siemens' established SIMATIC HMI product line, offering robust performance for machine-level and process-level HMI applications. The MP 370 series bridges the gap between compact operator panels and full PC-based systems, providing a versatile platform for a wide range of automation tasks.

The 6AV6446-3AA41-1AY3 variant is equipped with a 12.1-inch TFT display with a resolution of 800 x 600 pixels (SVGA) and supports 256 colors. It features a touch screen interface and includes communication interfaces such as MPI/PROFIBUS DP and Ethernet (10/100 Mbit/s), enabling integration with Siemens S7-300 and S7-400 PLCs as well as third-party controllers. The panel runs on Windows CE and is configured using WinCC flexible engineering software. It provides onboard flash memory and supports CompactFlash cards for additional storage and project data.

The MP 370 is widely used in manufacturing, automotive, food and beverage, and process industries where a large, reliable HMI display is required at the machine or line level. Its combination of touch operation, robust industrial housing, and broad communication capability makes it suitable for complex visualization tasks, recipe management, alarm logging, and trend displays in both discrete and continuous production environments.

Technical Specifications

Display Size	12.1 inch
Display Type	TFT color
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touch screen
Operating System	Windows CE
Communication Interface	MPI/PROFIBUS DP, Ethernet 10/100 Mbit/s, RS-422/RS-485
Engineering Software	WinCC flexible
Storage	Onboard flash memory, CompactFlash card slot
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The configured connection cannot be established or has been interrupted.
Check MPI/PROFIBUS DP or Ethernet cable connections and termination resistors. Verify PLC address settings and communication parameters in WinCC flexible match the hardware configuration.
Event ID: 10001: Connection to the PLC was established but subsequently lost during operation.
Inspect cabling for intermittent faults. Check PLC program is running and not in STOP mode. Verify network load and address conflicts on the bus.
Event ID: 40000: System memory is low. The panel is running low on available RAM, which may affect performance or stability.
Reduce the number of active screens or logged data. Archive and clear alarm and data logs. Consider optimizing the WinCC flexible project to reduce memory usage.
Event ID: 50000: Project download error. A fault occurred during transfer of the WinCC flexible project to the panel.
Ensure the correct communication interface and transfer settings are selected in WinCC flexible. Check that the panel is in Transfer mode and that no firewall or network policy is blocking the connection.
Event ID: 20000: Tag read/write error. A configured tag could not be read from or written to the PLC.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check PLC program for address changes and confirm the PLC is in RUN mode.
Event ID: 70000: Backup battery low or missing. The internal buffer battery voltage has dropped below the minimum threshold.
Replace the internal buffer battery with the correct Siemens-specified replacement. Refer to the MP 370 operating instructions for battery replacement procedure.
Event ID: 60000: Screen saver or backlight fault. The display backlight has failed or the screen saver has activated unexpectedly.
Check the screen saver settings in the panel's system settings. If the backlight has failed, the display unit or backlight inverter may require replacement.

Frequently Asked Questions

Which engineering software is used to configure the MP 370 (6AV6446-3AA41-1AY3)?

The MP 370 is configured using Siemens WinCC flexible. Projects are created on a PC and then downloaded to the panel via MPI, PROFIBUS DP, or Ethernet.

Which PLCs are compatible with the Siemens MP 370?

The MP 370 is primarily designed for use with Siemens S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. It also supports Ethernet-based communication and can be connected to third-party controllers using appropriate drivers in WinCC flexible.

What is the supply voltage for the 6AV6446-3AA41-1AY3?

The panel operates on 24 V DC. Ensure the power supply is within the specified tolerance range as stated in the MP 370 operating instructions.

Does the MP 370 support CompactFlash cards?

Yes, the MP 370 includes a CompactFlash card slot that can be used for additional project storage, data logging, recipe storage, and backup of the panel configuration.

What is the front panel protection rating of the MP 370?

The front panel of the MP 370 achieves IP65 protection, 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 24 V DC at the power supply connector on the rear of the panel. Check that the supply voltage is within the specified range. Inspect the internal fuse if accessible.

Restore correct 24 V DC supply. If the supply is correct and the display remains blank, the backlight or inverter board may have failed and the display unit should be repaired or replaced.

Panel fails to communicate with S7-300 PLC via MPI

Verify MPI cable connections at both the panel and PLC. Check that the MPI address configured in WinCC flexible matches the address set on the panel and that the bus termination is correctly applied at both ends of the MPI network.

Correct any address mismatches in WinCC flexible and the panel system settings. Ensure only the two physical end nodes on the MPI bus have termination resistors enabled. Replace the MPI cable if continuity testing reveals a fault.

Touch screen does not respond or responds inaccurately

Attempt to recalibrate the touch screen via the panel's system settings menu. Check for physical damage or contamination on the touch surface.

Perform a touch screen calibration from the Start Center or Control Panel on the Windows CE interface. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touch screen overlay may require replacement.

WinCC flexible project fails to download to the panel

Confirm the panel is set to Transfer mode (accessible from the Start Center). Verify the correct communication interface (Ethernet or MPI) and IP address or MPI address are configured in the WinCC flexible Transfer settings.

Set the panel to Transfer mode before initiating the download. Correct the transfer settings in WinCC flexible to match the panel's network configuration. Disable any PC firewall rules that may block the transfer port if using Ethernet.

Panel repeatedly reboots or freezes during operation

Check for unstable 24 V DC supply voltage, particularly voltage dips under load. Review the alarm and system event log on the panel for recurring event IDs. Inspect the CompactFlash card for errors if one is installed.

Stabilize the power supply and ensure adequate current capacity. Remove and reinsert the CompactFlash card, or replace it if errors are detected. If the problem persists, perform a panel reset to factory defaults and reload the WinCC flexible project.

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