Siemens 6AV6446-1AA40-0AA3 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-0AA3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-0AA3
Price: 5547.00 EUR
Availability: InStock

€ 5.547,00

Condition

Clear

SKU: 6AV6446-1AA40-0AA3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-0AA3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for machine-level visualization and operator control in industrial automation environments. This panel features a 12-inch TFT display and is part of the SIMATIC MP 370 series, which provides a robust and versatile platform for process visualization. It is manufactured by Siemens and operates under the WinCC flexible runtime environment.

The MP 370 panel is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA), supporting up to 256 colors. It includes both touch screen and key-based operation, offering flexible interaction modes for operators. Communication interfaces include MPI/PROFIBUS DP, RS-232, RS-422/485, and USB ports, enabling integration with a wide range of Siemens PLCs and third-party controllers. The unit operates on a 24 V DC supply and provides onerous memory capacity for project data, recipes, and data logs.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, and chemical processing industries where reliable HMI functionality is required at the machine level. Its combination of touch and function key operation makes it suitable for environments where operators require both graphical navigation and dedicated key inputs. The panel's compatibility with SIMATIC S7 controllers and WinCC flexible engineering software makes it a standard choice for Siemens-based automation systems.

Technical Specifications

Display Size	12 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT color
Display Colors	256 colors
Touch Technology	Resistive touch screen with function keys
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI/PROFIBUS DP, RS-232, RS-422/485, USB
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 panel)
Mounting	Panel mounting
Series/Product Family	SIMATIC MP 370
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Connection to PLC lost or communication timeout occurred between the HMI panel and the configured controller.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both PLC and HMI panel if necessary.
Event ID: 10001: Connection to PLC established after a previous communication failure.
Informational event. No corrective action required. Monitor for recurring disconnections which may indicate cable or network issues.
Event ID: 20000: Operating system error or runtime software fault detected on the HMI panel.
Perform a warm restart of the panel. If the fault persists, reload the WinCC flexible project via ProSave or the transfer connection. Check for corrupted project data.
Event ID: 40000: Project transfer initiated or completed. A new project has been loaded onto the panel.
Informational event. Verify the correct project version has been transferred and that all PLC connections are functioning correctly after transfer.
Event ID: 50000: Data record or recipe transfer error. A recipe or data record could not be read or written correctly.
Check available memory on the panel. Verify recipe configuration in WinCC flexible. Ensure the target memory card or internal memory is not full or corrupted.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms has exceeded the configured alarm buffer capacity.
Acknowledge and clear existing alarms. Increase the alarm buffer size in the WinCC flexible project configuration if overflow occurs frequently.
Event ID: 110000: System time synchronization event. The panel clock has been synchronized with the PLC or an external time source.
Informational event. If time synchronization is incorrect, verify the time synchronization settings in the WinCC flexible project and check the PLC system clock.

Frequently Asked Questions

What PLC systems is the SIMATIC MP 370 compatible with?

The MP 370 is compatible with Siemens SIMATIC S7-200, S7-300, S7-400, and S5 controllers via MPI or PROFIBUS DP interfaces. It also supports third-party controllers through serial RS-232/RS-422/485 connections using appropriate communication drivers in WinCC flexible.

What engineering software is required to configure the MP 370?

The MP 370 is configured using Siemens WinCC flexible software. Projects are created on a PC and transferred to the panel via MPI, PROFIBUS DP, USB, or Ethernet (if an optional Ethernet module is present).

Does the MP 370 support both touch and key operation?

Yes, the MP 370 12-inch variant supports both resistive touch screen input and physical function keys, allowing operators to interact with the HMI using either method depending on the application requirements.

What is the operating voltage for the 6AV6446-1AA40-0AA3?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range and provides sufficient current capacity for stable operation.

Can the MP 370 store recipes and data logs internally?

Yes, the MP 370 supports internal storage of recipes, data logs, and alarm archives. Additional storage capacity can be provided via a CompactFlash memory card inserted into the panel's card slot.

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 tolerance. Inspect the internal fuse if accessible.

Verify and restore correct 24 V DC supply. If the supply is correct but the display remains blank, the backlight inverter or the display unit itself may require replacement. A service repair of the panel may be necessary.

HMI panel does not communicate with the S7 PLC

Check the MPI or PROFIBUS DP cable for continuity and correct termination at both ends of the network. Verify that the bus address configured in the HMI project matches the physical panel address set in the panel's transfer settings.

Replace or reseat the communication cable. Correct the MPI/PROFIBUS address in the WinCC flexible project or adjust the panel address via the Start Center settings menu. Ensure only one active bus termination exists at each end of the network.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touch screen through the panel's Start Center or Control Panel settings. Check for physical damage or contamination on the screen surface.

Perform a touch screen recalibration via the Start Center. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touch screen overlay may need to be replaced.

Project transfer fails or panel is not detected by the engineering PC

Check the USB or MPI cable connection between the PC and the panel. Ensure the panel is in Transfer mode, accessible via the Start Center. Verify that the correct communication interface is selected in WinCC flexible transfer settings.

Switch the panel to Transfer mode manually via the Start Center. Use a known-good USB or MPI/PC adapter cable. Reinstall the PC adapter driver if the device is not recognized. Ensure no firewall or antivirus software is blocking the transfer communication.

Panel repeatedly restarts or displays a runtime error on startup

The issue may be caused by a corrupted WinCC flexible project stored on the panel or a failing CompactFlash card. Attempt to boot the panel into the Start Center by pressing the appropriate key combination during startup.

Boot into the Start Center and use ProSave or a direct transfer connection to reload a valid project onto the panel. If a CompactFlash card is installed, remove it and test without the card. Replace the CompactFlash card if it is found to be faulty.

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