Siemens 6AV6446-3BA41-3BY4 SIMATIC MP 370

SKU: 6AV6446-3BA41-3BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3BA41-3BY4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI product family, designed for demanding machine-level visualization and operator control tasks. This panel is part of Siemens' high-performance Multi Panel series, offering a 15-inch TFT display and running the Windows CE operating system with WinCC flexible runtime. It serves as a powerful operator interface for complex automation systems requiring rich graphical visualization.

The MP 370 features a 15-inch TFT color display with a resolution of 1024 x 768 pixels (XGA) and supports both touch and key operation, making it highly flexible for various operator interaction models. It is equipped with multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (10/100 Mbit/s), enabling seamless integration into Siemens S7 and other PLC environments. The panel includes a CompactFlash card slot for project storage and data logging, and provides USB ports for peripheral connectivity. It operates on a 24 V DC supply and is rated IP65 at the front panel for protection against dust and water ingress.

The SIMATIC MP 370 is widely deployed in manufacturing automation, process control, and machine tool applications where a large, high-resolution display and robust communication capabilities are essential. Its compatibility with PROFIBUS DP and Ethernet makes it suitable for integration into distributed control architectures in industries such as automotive, food and beverage, chemical processing, and packaging. The panel's ability to run third-party Windows CE applications alongside WinCC flexible further extends its utility in complex, multi-function operator station setups.

Technical Specifications

Display Size	15 inch
Display Resolution	1024 x 768 px (XGA)
Display Colors	64,000 colors
Display Type	TFT color
Touch Technology	Resistive touchscreen and membrane keys
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
USB Ports	2 x USB (Type A)
Memory	12 MB user memory; CompactFlash card slot
Operating System	Windows CE 5.0
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), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI Multi Panel MP 370

Common Error Codes & System Events

Event ID: 10000: Configuration error detected during project download or startup, indicating a mismatch between the configured and connected PLC type.
Verify the PLC type and communication settings in WinCC flexible. Re-download the project after correcting the configuration.
Event ID: 20000: Communication error with the configured PLC or controller. The panel cannot establish or maintain a connection to the PLC.
Check MPI/PROFIBUS address settings, cable connections, and termination resistors. Verify PLC is powered and in RUN mode.
Event ID: 40000: Tag read/write error. A configured tag cannot be read from or written to the connected controller.
Verify the tag address exists in the PLC program and that the data type matches the HMI configuration. Check communication link integrity.
Event ID: 50000: System memory low warning. Available runtime memory is critically low, which may cause instability or project execution errors.
Reduce the number of active screens, limit logging intervals, or increase CompactFlash storage allocation. Restart the panel if instability occurs.
Event ID: 60000: Project transfer error. A project download from the engineering PC to the panel was interrupted or failed.
Check the Ethernet or MPI/PROFIBUS cable connection between the PC and panel. Ensure WinCC flexible is set to the correct transfer channel and retry the download.
Event ID: 70000: Backup/restore error. A data backup or restore operation via CompactFlash or USB could not be completed successfully.
Verify the CompactFlash card or USB device is properly inserted and not write-protected. Check available storage space and retry the operation.
Event ID: 30000: Printer communication error. The panel cannot communicate with the configured printer.
Check the printer connection and driver settings. Verify the printer is powered on and configured correctly in the HMI project settings.

Frequently Asked Questions

What PLC systems is the SIMATIC MP 370 compatible with?

The MP 370 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. It also supports Ethernet-based communication with S7 controllers and can be configured for third-party PLCs using appropriate drivers in WinCC flexible.

What engineering software is required to configure the 6AV6446-3BA41-3BY4?

The MP 370 is configured using Siemens WinCC flexible software. The project is created on a PC and downloaded to the panel via Ethernet, MPI, or PROFIBUS DP.

Does the MP 370 support both touch and key operation?

Yes, the MP 370 15-inch variant supports both resistive touchscreen input and physical membrane function keys, allowing flexible operator interaction depending on the application requirements.

What is the operating voltage of the 6AV6446-3BA41-3BY4?

The panel operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI panels in industrial environments.

Can the CompactFlash card be used for data logging and recipe storage?

Yes, the CompactFlash card slot supports project storage, data logging, recipe management, and backup/restore operations, providing expandable non-volatile storage for runtime data.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel's power connector. Check whether the panel emits any startup sounds or LED indicators are active, which would suggest a display hardware fault rather than a power issue.

Verify and correct the 24 V DC supply. If power is confirmed and the display remains blank, the backlight or display unit may be faulty and require replacement of the display assembly.

Panel fails to establish communication with the PLC

Check the MPI or PROFIBUS DP cable connections and verify that bus termination resistors are correctly placed at both ends of the bus. Confirm that the panel's MPI/PROFIBUS address does not conflict with other devices on the network.

Correct any address conflicts, replace damaged cables, and ensure proper bus termination. Re-download the project with verified communication parameters from WinCC flexible.

Touchscreen does not respond accurately or registers incorrect touch positions

The resistive touchscreen may require recalibration, or the touch surface may be contaminated or physically damaged. Access the panel's Control Panel via the Start menu to run the touch calibration utility.

Perform a touchscreen recalibration using the built-in Windows CE calibration tool. If inaccuracy persists after calibration, the touchscreen overlay may need to be replaced.

Project download fails or times out during transfer

Check the physical connection between the engineering PC and the panel (Ethernet or MPI cable). Verify that the correct transfer channel is selected in WinCC flexible and that the panel is in Transfer mode.

Switch the panel to Transfer mode via the Start Center, confirm network or bus settings match on both the PC and panel, and retry the download. Replace the transfer cable if the connection is intermittent.

Panel reboots unexpectedly or freezes during operation

Inspect the 24 V DC power supply for voltage fluctuations or insufficient current capacity. Check the CompactFlash card for errors and review the system event log for recurring fault event IDs.

Stabilize the power supply and ensure it meets the panel's current requirements. Replace a faulty CompactFlash card and reduce project complexity if memory resources are critically low.

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