Siemens 6AV6446-1AA40-1AA3 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-1AA3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-1AA3
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1AA40-1AA3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-1AA3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and plant-level visualization tasks. This unit features a 12-inch TFT display and is part of Siemens' high-performance panel range, capable of running WinCC flexible runtime for comprehensive process visualization. It is a Windows CE-based operator panel intended for use as a standalone HMI or integrated into larger SIMATIC automation architectures.

The MP 370 panel offers a 12-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports both touch and key operation depending on the variant. It is equipped with MPI/PROFIBUS DP and Ethernet interfaces, enabling direct connectivity to SIMATIC S7 PLCs and other automation controllers. The unit runs on Windows CE and supports WinCC flexible as its configuration software, providing a robust environment for alarm management, trend displays, recipe handling, and data logging. Onboard memory includes Flash memory for project storage and RAM for runtime operation.

The SIMATIC MP 370 is widely deployed in manufacturing automation, process industries, and machine building applications where a larger display format and multi-functionality are required. Its compatibility with PROFIBUS DP and Industrial Ethernet makes it suitable for integration into distributed control systems across automotive, food and beverage, chemical, and packaging industries. The panel's rugged construction and wide operating temperature range make it appropriate for installation in industrial control cabinets and harsh production environments.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color LCD
Display Resolution	800 x 600 pixels (SVGA)
Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI/PROFIBUS DP, Industrial Ethernet (RJ45), RS-422/485, USB
Operating System	Windows CE
Configuration Software	WinCC flexible
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
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC MP 370

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been lost.
Check MPI/PROFIBUS or Ethernet cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both the HMI and PLC if necessary.
Event ID: 10001: Connection timeout to the configured PLC. The HMI did not receive a response from the controller within the expected time frame.
Verify network cabling and bus termination. Check that the PLC is in RUN mode and the communication parameters (baud rate, station address) are correctly configured in the HMI project.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured process tag from the PLC.
Check that the tag address exists in the PLC program and that the data type matches the HMI configuration. Verify the PLC program is running and the relevant data block is present.
Event ID: 20001: Tag write error. A write operation to a PLC tag failed.
Confirm the PLC tag is not write-protected and the address is correct. Check communication link integrity and ensure the PLC is in a state that accepts write commands.
Event ID: 40000: Project loading error. The HMI runtime was unable to load the project file from Flash memory.
Re-transfer the project from the engineering PC using WinCC flexible. Check Flash memory integrity and ensure sufficient free memory is available on the panel.
Event ID: 50000: System memory low. Available RAM for the runtime application is critically low.
Reduce the number of simultaneously active screens or objects. Optimize the project by reducing image sizes and the number of active tags. Restart the panel to clear memory.
Event ID: 70000: Backup battery low or missing. The internal buffer battery voltage has dropped below the minimum threshold.
Replace the internal backup battery with the correct Siemens replacement battery. Refer to the MP 370 operating instructions for battery replacement procedure.
Event ID: 110000: Printer communication error. The panel cannot communicate with the configured printer.
Check printer cable connections and verify the printer driver and port settings in the HMI project configuration. Ensure the printer is powered on and online.

Frequently Asked Questions

Which configuration software is required for the SIMATIC MP 370 (6AV6446-1AA40-1AA3)?

The MP 370 is configured using Siemens WinCC flexible. The project is created on an engineering PC and transferred to the panel via Ethernet, USB, or MPI connection.

Which PLC families are compatible with this HMI panel?

The MP 370 supports direct communication with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP, as well as S7 controllers over Industrial Ethernet. Third-party controllers can be connected using supported communication drivers.

What is the supply voltage for the 6AV6446-1AA40-1AA3?

The panel operates on 24 V DC. The power supply must be capable of providing sufficient current, typically from a regulated 24 V DC source.

What is the front panel IP protection rating?

The front panel of the MP 370 carries an IP65 protection rating, making it suitable for installation in environments where dust and water jets may be present.

Can the MP 370 be used with WinCC (full version) instead of WinCC flexible?

No, the MP 370 is designed to run WinCC flexible runtime. It is not compatible with the full WinCC SCADA software, which is intended for PC-based systems.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel's power connector. Verify that the supply is within the specified range and that the connector is properly seated. Check for any blown internal fuses.

Ensure the 24 V DC power supply is stable and correctly wired. If the supply is confirmed good but the display remains off, the internal power supply board or backlight inverter may be faulty and require replacement or professional repair.

HMI panel shows 'No connection to PLC' or communication errors on startup

Verify the MPI/PROFIBUS or Ethernet cable is correctly connected and undamaged. Check that the bus termination resistors are properly placed at both ends of the bus. Confirm the PLC station address and baud rate match the HMI project settings.

Correct any wiring or termination issues. Update the communication parameters in the WinCC flexible project to match the PLC configuration and re-transfer the project to the panel. Restart both devices after making changes.

Touchscreen does not respond or responds inaccurately to touch input

Attempt to recalibrate the touchscreen using the panel's built-in calibration utility accessible from the Windows CE Start menu or Control Panel. Check for physical damage or contamination on the screen surface.

Run the touchscreen calibration procedure. Clean the screen surface with a soft, lint-free cloth. If calibration does not resolve the issue, the touchscreen overlay may be damaged and require replacement.

Project transfer from engineering PC fails

Check the communication cable between the PC and the panel (Ethernet or USB). Verify that WinCC flexible on the PC is set to the correct transfer channel and that the panel is in Transfer mode. Check for firewall or antivirus software blocking the connection on the PC.

Set the panel to Transfer mode via the Start Center or Windows CE taskbar. Disable any firewall or antivirus software temporarily during transfer. Ensure the correct IP address or COM port is configured in WinCC flexible's transfer settings.

Panel restarts unexpectedly or freezes during operation

Check the 24 V DC supply for voltage dips or instability under load. Review the HMI project for memory-intensive screens or a large number of simultaneously active tags that could cause runtime overload.

Use a regulated, adequately rated 24 V DC power supply. Optimize the WinCC flexible project to reduce memory usage. Update the panel firmware to the latest version compatible with the hardware. If the issue persists, the panel may require hardware inspection.

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