Siemens 6AV6446-1AA40-0AB3 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-0AB3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-0AB3
Price: 5547.00 EUR
Availability: InStock

€ 5.547,00

Condition

Clear

SKU: 6AV6446-1AA40-0AB3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-0AB3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level visualization and operator control tasks. This unit features a 12-inch TFT display and is part of Siemens' high-performance panel range, offering robust local HMI functionality for industrial environments. It is a Windows CE-based operator panel capable of running WinCC flexible runtime for advanced process visualization.

The MP 370 (6AV6446-1AA40-0AB3) is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA), supporting up to 256 colors. It provides multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration with SIMATIC S7 PLCs and other controllers. The panel runs on Microsoft Windows CE and supports WinCC flexible 2004 or later for project configuration, with onboard flash memory and an expansion slot for CompactFlash cards. A resistive touchscreen and function keys provide flexible operator input options.

The SIMATIC MP 370 is widely used in machine building, automotive manufacturing, food and beverage processing, and chemical plant environments where a mid-to-large format HMI with reliable PLC connectivity is required. Its compatibility with the SIMATIC S7-300 and S7-400 controller families makes it a standard choice for system integrators working within the Siemens automation ecosystem. The panel's rugged construction and wide operating temperature range make it suitable for installation in industrial control cabinets and harsh production environments.

Technical Specifications

Display Size	12 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT color LCD
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
Operating System	Microsoft Windows CE
Memory	Onboard Flash; CompactFlash card slot
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
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/Ethernet cabling and connector integrity. Verify PLC address settings match the HMI project configuration. Confirm the PLC is powered and in RUN mode.
Event ID: 10001: Connection timeout to the configured PLC. The HMI did not receive a response from the controller within the expected time window.
Check network cable and interface settings. Verify baud rate and station address configuration on both the HMI and PLC. Restart both devices if the connection cannot be re-established.
Event ID: 20000: Tag read error. The HMI runtime was unable to read a configured tag from the PLC.
Verify the tag address exists in the PLC program and is accessible. Check that the data block or memory area referenced in the HMI project is correctly defined in the PLC.
Event ID: 20001: Tag write error. The HMI runtime was unable to write a value to the configured PLC tag.
Confirm the PLC is not in a protected or read-only mode. Verify the tag address and data type match between the HMI project and the PLC program.
Event ID: 40000: Project loading error. The HMI runtime encountered an error while loading the configured project from flash memory or CompactFlash card.
Re-transfer the project from the engineering PC using WinCC flexible. Check the CompactFlash card for errors or replace it if corrupted.
Event ID: 50000: System memory low. Available RAM on the HMI panel is critically low, which may cause runtime instability.
Reduce the number of active screens or objects in the WinCC flexible project. Restart the panel to free memory. If persistent, review project complexity and optimize screen objects.
Event ID: 60000: Internal hardware fault detected. A self-diagnostic routine has identified a hardware-level error within the panel.
Perform a full power cycle. If the fault persists, back up the project and contact Siemens technical support or arrange for panel repair and refurbishment.

Frequently Asked Questions

Which PLC families are compatible with the SIMATIC MP 370?

The MP 370 is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP, and also supports Ethernet-based communication with S7 controllers. It can also communicate with third-party controllers via configurable serial protocols.

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

The MP 370 is configured using Siemens WinCC flexible 2004 or later versions. Projects are transferred to the panel via Ethernet, MPI, or a USB/serial connection from the engineering PC.

Does the 6AV6446-1AA40-0AB3 support PROFIBUS DP communication?

Yes, the MP 370 includes an integrated PROFIBUS DP interface, allowing direct connection to SIMATIC S7 PLCs and other PROFIBUS-compatible devices without additional hardware.

What is the display size and resolution of this panel?

The 6AV6446-1AA40-0AB3 features a 12-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports up to 256 colors.

Can the CompactFlash slot be used for project storage or data logging?

Yes, the CompactFlash card slot can be used to store the HMI project, log recipe data, and archive alarm or process data, providing expandable non-volatile storage beyond the onboard flash memory.

Troubleshooting

Display remains blank after power on

Check that 24 V DC supply voltage is present at the power connector. Measure voltage at the panel terminals to confirm supply integrity. Inspect internal fuse if accessible.

Ensure the 24 V DC supply is within tolerance and properly connected. If supply voltage is confirmed correct and the display remains blank, the backlight inverter or internal power supply board may require replacement.

HMI panel fails to establish communication with the S7 PLC

Verify MPI or PROFIBUS cable connections and termination resistors. Check that the station address and baud rate configured in the HMI project match the PLC settings. Use Siemens STEP 7 to confirm the PLC is reachable on the network.

Correct any address or baud rate mismatches in the WinCC flexible project and re-transfer. Replace damaged cables or connectors. Ensure PROFIBUS termination is correctly applied at both ends of the bus segment.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen via the Windows CE control panel or the HMI startup menu. Check for physical damage or contamination on the screen surface.

Perform a touchscreen recalibration using the built-in calibration utility. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the resistive touch overlay may need to be replaced.

Project cannot be transferred from engineering PC to the panel

Verify the communication interface (Ethernet, MPI) settings on both the PC and the panel. Confirm the WinCC flexible version is compatible with the panel firmware version. Check that the panel is in transfer mode.

Set the panel to transfer mode via the Start Center menu. Ensure the correct interface and IP address or MPI address are configured in WinCC flexible transfer settings. Update panel firmware if a version mismatch is identified.

Panel repeatedly restarts or crashes during runtime

Check for project errors or memory overload conditions in the WinCC flexible runtime log. Inspect the 24 V DC supply for voltage fluctuations or ripple using a multimeter or oscilloscope.

Stabilize the power supply and ensure it meets the panel's current requirements. Optimize the WinCC flexible project to reduce memory usage. Re-transfer a clean project build to the panel and replace the CompactFlash card if data corruption is suspected.

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