Siemens 6AV6446-1AA40-0BB5 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-0BB5 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-0BB5
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1AA40-0BB5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-0BB5 is a Multi Panel (MP 370) belonging to the SIMATIC HMI product family. It is a 12-inch operator panel designed for machine-level visualization and control in industrial automation environments. This unit runs on the Windows CE operating system and is configured and programmed using Siemens WinCC flexible engineering software.

The MP 370 features a 12.1-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 multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (10/100 Mbit/s), enabling integration with a wide range of Siemens SIMATIC PLCs. The panel includes 12 MB of user memory for project data and supports USB ports for data transfer and peripheral connection. The unit operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and general industrial automation. Its combination of touch and key operation, robust communication capabilities, and compatibility with S7-300 and S7-400 PLC families makes it suitable for complex HMI applications requiring reliable operator interaction. The panel is particularly valued in applications where a large display area and multi-protocol connectivity are required at the machine level.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT Color LCD
Display Colors	256 colors
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
User Memory	12 MB
Communication Interface	MPI, PROFIBUS DP, Ethernet 10/100 Mbit/s, RS-422/485
USB Ports	2 x USB (Type A)
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
Operating System	Windows CE
Certifications	CE, UL, cULus
Mounting	Panel mounting

Common Error Codes and 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 to PLC interrupted during runtime. The HMI has lost communication with the configured controller.
Inspect network cabling and connectors. Verify the PLC is in RUN mode. Check for address conflicts on the PROFIBUS or MPI network.
Event ID: 10002: Tag read error. The HMI is unable to read a configured tag or variable from the PLC.
Verify the tag address exists in the PLC program and that the data block or memory area is accessible. Check for PLC program changes that may have altered the tag structure.
Event ID: 10003: Tag write error. The HMI is unable to write a value to the configured PLC tag.
Confirm the PLC is in RUN mode and the target memory area is not write-protected. Check operator permissions and tag configuration in WinCC flexible.
Event ID: 20000: Project transfer error. A project download from the engineering PC to the HMI panel has failed.
Check the transfer cable or Ethernet connection between the engineering PC and the HMI. Ensure the panel is in Transfer mode and that the correct interface is selected in WinCC flexible.
Event ID: 40000: System memory low. Available runtime memory on the HMI panel is critically low.
Reduce the number of simultaneously active screens or objects. Optimize the project by removing unused tags, images, or scripts. Consider archiving historical data to external storage.
Event ID: 50000: Internal device error or hardware fault detected on the HMI panel.
Perform a controlled restart of the panel. If the error persists, back up the project and perform a factory reset. Contact Siemens technical support or arrange for panel repair if the fault recurs.
Event ID: 70010: Configuration error detected in the loaded project. A mismatch exists between the project configuration and the panel hardware or firmware version.
Verify the project was compiled for the correct HMI panel type and firmware version in WinCC flexible. Recompile and re-download the project after correcting the target device settings.

Frequently Asked Questions

Which engineering software is used to program the MP 370?

The SIMATIC MP 370 is programmed using Siemens WinCC flexible. The project is compiled on a PC and downloaded to the panel via MPI, PROFIBUS, Ethernet, or USB.

Which Siemens PLCs are compatible with the 6AV6446-1AA40-0BB5?

The MP 370 is compatible with SIMATIC S7-300, S7-400, S7-200, and S5 PLC families via MPI or PROFIBUS DP interfaces. Ethernet connectivity also allows integration with S7 PLCs equipped with Ethernet communication modules.

What is the operating voltage of this HMI panel?

The panel operates on 24 V DC. It is important to ensure a stable, regulated 24 V DC power supply to prevent display or communication issues.

Does the 6AV6446-1AA40-0BB5 support both touch and key operation?

Yes, the MP 370 12-inch variant supports resistive touch screen operation. Depending on the specific sub-variant, function keys may also be available for operator input.

What is the front panel protection rating of this unit?

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

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is stable and within specification. If the supply is correct and the display remains blank, the backlight or internal power supply board may have failed and the unit should be sent for repair.

HMI panel cannot communicate with the PLC

Verify the communication cable type and wiring (MPI, PROFIBUS, or Ethernet). Check the bus address configured in the HMI project matches the physical PLC address. Use a bus diagnostic tool to check for network errors or address conflicts.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download. Ensure PROFIBUS termination resistors are correctly placed at both ends of the network.

Touchscreen does not respond or responds inaccurately

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

Clean the touch surface with a soft, dry cloth. Perform a touchscreen recalibration through the Windows CE Control Panel. If the touchscreen remains unresponsive after recalibration, the touch overlay may require replacement.

Project transfer from engineering PC fails

Confirm the panel is set to Transfer mode. Verify the correct communication interface and parameters are selected in WinCC flexible Transfer settings. Check the physical connection (Ethernet cable or MPI/PROFIBUS adapter).

Set the panel to Transfer mode via the Start Center. Match the IP address or bus address in the WinCC flexible transfer settings to the panel configuration. Replace the transfer cable or adapter if the connection cannot be established.

Panel reboots unexpectedly during operation

Check the 24 V DC supply for voltage dips or instability under load. Review the system event log on the panel for recorded fault events prior to the reboot. Inspect the project for memory overload conditions.

Install a regulated, adequately rated 24 V DC power supply. Optimize the HMI project to reduce memory usage. If reboots persist without a clear cause, perform a firmware update or factory reset and reload the project.

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