Siemens 6AV6446-4AA40-2BY4 SIMATIC MP 370

Name: Siemens 6AV6446-4AA40-2BY4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-4AA40-2BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-4AA40-2BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-4AA40-2BY4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding visualization and operator control tasks in industrial automation environments. This panel features a 15-inch TFT display and is part of the MP 370 series, which represents a high-performance class of Siemens HMI devices capable of running WinCC flexible runtime software. It serves as a powerful operator interface for monitoring and controlling complex machine and plant processes.

The MP 370 panel is equipped with a high-resolution 15-inch TFT color display with a resolution of 1024 x 768 pixels (XGA), providing clear and detailed visualization of process data. It supports both touch screen and key operation, offering flexible interaction options for operators. The unit communicates via MPI, PROFIBUS DP, and Ethernet interfaces, enabling seamless integration into Siemens S7 PLC networks. It runs on a Windows CE operating system and supports WinCC flexible runtime for project configuration and execution, with onboard flash memory and options for external storage via CompactFlash or USB.

The SIMATIC MP 370 is widely used in manufacturing, automotive, chemical processing, and energy industries where large-format, high-resolution visualization is required at the machine or control panel level. Its robust industrial design, wide communication interface support, and compatibility with the SIMATIC S7-300 and S7-400 controller families make it suitable for complex SCADA-level visualization tasks at the field level. The panel is particularly well suited for applications requiring simultaneous display of multiple process values, trend curves, and alarm management on a single screen.

Technical Specifications

Display Size	15 inch
Display Resolution	1024 x 768 pixels (XGA)
Display Colors	64,000 colors
Display Type	TFT color LCD
Touch Technology	Resistive touch screen with additional function keys
Operating System	Windows CE
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 60 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (10/100 Mbit/s), RS-422/RS-485
Memory	12 MB onboard flash (user memory)
External Storage	CompactFlash slot, 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
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 panel and the PLC.
Event ID: 10001: Connection timeout to the configured PLC. The HMI panel 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. Confirm baud rate and station address settings in the HMI project match the PLC configuration.
Event ID: 40000: Project loading error. The runtime project could not be loaded from flash memory or external storage.
Re-transfer the WinCC flexible project to the panel using ProSave or WinCC flexible. Check the integrity of the project file and ensure sufficient free memory on the device.
Event ID: 50000: System memory low. Available RAM on the HMI panel is critically low, which may cause instability or failure to load project components.
Reduce the complexity of the HMI project (number of screens, images, scripts). Restart the panel. If the problem persists, check for memory leaks in VB scripts within the project.
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 the HMI project matches the actual PLC data block or memory address. Check PLC program for correct data type and address range.
Event ID: 110000: Alarm buffer overflow. The number of pending or logged alarms has exceeded the configured buffer limit.
Acknowledge and clear existing alarms. Increase the alarm buffer size in the WinCC flexible project settings. Archive alarm logs to external storage regularly.
Event ID: 70010: Backup battery low or missing. The internal buffer battery for retaining real-time clock data is discharged or not present.
Replace the internal lithium backup battery with the correct replacement type. Refer to the MP 370 operating instructions for battery replacement procedure.

Frequently Asked Questions

What PLC families are compatible with the SIMATIC MP 370?

The MP 370 is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLC families via MPI or PROFIBUS DP. Ethernet-based communication with S7 controllers is also supported using the integrated 10/100 Mbit/s Ethernet port.

What software is used to configure and program the MP 370 panel?

The MP 370 is configured using Siemens WinCC flexible engineering software. Projects are compiled and transferred to the panel via Ethernet, MPI, or USB using the ProSave transfer tool.

Does the MP 370 support both touch and key operation?

Yes, the MP 370 15-inch variant supports both resistive touch screen input and hardware function keys located around the display bezel, allowing flexible operator interaction.

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

The front panel of the MP 370 is rated IP65, making it protected against dust ingress and low-pressure water jets, suitable for installation in industrial control cabinet doors.

Can the MP 370 store data or project files on external media?

Yes, the MP 370 is equipped with a CompactFlash card slot and USB ports, which can be used for project transfer, data logging, recipe storage, and alarm archiving.

Troubleshooting

Display remains blank after power on

Measure 24 V DC supply voltage at the panel power connector. Check that the supply is within the specified range and that polarity is correct. Inspect the internal fuse if accessible.

Correct the supply voltage if out of range. If voltage is correct but display remains blank, the internal power supply board or backlight inverter may be faulty and require replacement.

HMI panel fails to establish communication with the PLC

Check the MPI or PROFIBUS cable connections and verify bus termination at both ends of the network. Confirm that the station address and baud rate configured in the HMI project match the PLC settings.

Correct any address or baud rate mismatches in the WinCC flexible project and re-transfer. Replace faulty cables or connectors. Ensure only one active bus termination exists at each end of the bus segment.

Touch screen does not respond or responds inaccurately

Attempt to recalibrate the touch screen through the Windows CE Control Panel or the SIMATIC HMI startup menu. Check for physical damage or contamination on the touch surface.

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

Project transfer fails or is interrupted

Verify the transfer connection type (Ethernet, MPI, or USB) and confirm the panel is in Transfer mode. Check that the PC firewall or antivirus software is not blocking the ProSave or WinCC flexible transfer process.

Set the panel to Transfer mode via the Start Center. Disable firewall exceptions for WinCC flexible and ProSave. Use a direct point-to-point Ethernet connection if network transfer is unreliable.

Panel reboots unexpectedly or freezes during operation

Check the 24 V DC supply for voltage dips or ripple using an oscilloscope or multimeter. Review the WinCC flexible project for complex scripts or excessive tag update rates that may overload the CPU.

Stabilize the power supply by using a dedicated 24 V DC power supply unit with adequate current capacity. Optimize the HMI project by reducing script complexity and increasing tag update cycle times where possible.

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