Siemens 6AV6446-3AA41-3BY4 SIMATIC MP 370

Name: Siemens 6AV6446-3AA41-3BY4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-3AA41-3BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-3AA41-3BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA41-3BY4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level visualization and operator control tasks. This panel features a 12-inch TFT display and is part of Siemens' high-performance Multi Panel series, which bridges the gap between standard operator panels and full PC-based systems. It is intended for use as a stationary operator interface in industrial automation environments.

The MP 370 (6AV6446-3AA41-3BY4) is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation. It runs the WinCC flexible runtime environment and offers communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration with SIMATIC S7 PLCs and other controllers. The panel includes a robust industrial-grade housing, onboard flash memory for project storage, and supports USB ports for peripheral connectivity and data transfer.

The MP 370 is widely deployed in machine building, automotive manufacturing, process automation, and packaging industries where a reliable, mid-to-high performance HMI is required. Its combination of touch operation, multiple communication interfaces, and compatibility with the SIMATIC software ecosystem makes it suitable for complex visualization tasks involving many process variables, alarm management, and recipe handling. The panel is designed for panel mounting in control cabinets and operator stations.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color
Display Resolution	800 x 600 pixels (SVGA)
Touch Technology	Resistive Touch Screen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), 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/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Series/Product Family	SIMATIC MP 370
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. Connection to the configured controller cannot be established.
Check MPI/PROFIBUS or Ethernet cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both PLC and HMI panel.
Event ID: 10001: Connection to PLC interrupted during operation. The HMI lost communication with the controller.
Inspect cabling for damage or loose connectors. Check PLC operating state. Verify network configuration and baud rate settings in WinCC flexible.
Event ID: 20000: Project download error. Transfer of the WinCC flexible project to the panel failed.
Ensure the panel is in Transfer mode. Verify the correct communication interface is selected in WinCC flexible Transfer settings. Check cable integrity and PC interface settings.
Event ID: 40000: Runtime system error. The WinCC flexible runtime has encountered an internal fault and may have stopped.
Restart the HMI panel. If the error persists, reload the project via WinCC flexible. Check for corrupted project files and regenerate if necessary.
Event ID: 50000: Memory error or insufficient memory. The panel cannot load or execute the project due to low available memory.
Reduce project size by optimizing graphics and scripts. Delete unused project data from the panel memory. Perform a memory reset and reload the project.
Event ID: 70000: Configuration error detected. A tag or screen object references an invalid or missing data source.
Open the project in WinCC flexible and check for configuration errors or missing tag connections. Recompile and re-download the corrected project to the panel.
Event ID: 30000: Backup/restore error. A backup or restore operation of the panel data failed.
Ensure sufficient free memory on the target storage medium (USB or memory card). Retry the backup/restore operation. If the issue persists, format the storage medium and attempt again.

Frequently Asked Questions

Which PLC families is the 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 controllers using WinCC flexible drivers.

What software is required to program or configure the MP 370?

The MP 370 is configured using Siemens WinCC flexible (version 2004 or later, depending on firmware). Projects are created on a PC and transferred to the panel via MPI, PROFIBUS, Ethernet, or USB.

Does the MP 370 support recipe management and alarm logging?

Yes, the MP 370 supports recipe management, alarm logging, and trend display as standard functions within the WinCC flexible runtime environment. Data can be stored on internal flash memory or external USB storage.

What is the operating voltage of the MP 370?

The MP 370 operates on 24 V DC. The supply must be within the specified tolerance range, typically 19.2 V DC to 28.8 V DC.

Can the MP 370 be used in outdoor or harsh environments?

The front panel of the MP 370 is rated IP65, making it suitable for protection against dust and water jets from the front when correctly panel-mounted. However, it is not rated for direct outdoor exposure to sunlight or extreme temperatures beyond its specified range.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the supply is within the 19.2–28.8 V DC range. Inspect the internal fuse if accessible.

Restore correct supply voltage. If the backlight has failed, the panel may require backlight or display replacement. If the panel does not boot at all, check for firmware corruption and attempt a firmware update via WinCC flexible.

HMI panel fails to communicate with S7 PLC via MPI

Verify MPI cable connections and that the cable is correctly terminated. Check that the MPI address configured in the HMI project matches the PLC's MPI address. Confirm the baud rate settings are consistent on both devices.

Correct any address or baud rate mismatches in WinCC flexible project settings. Replace the MPI cable if damaged. Ensure only one active termination resistor is present at each end of the MPI network.

Touch screen does not respond or responds inaccurately

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

Clean the touch surface with a soft, dry cloth. Perform touch screen recalibration via the panel's system settings. If the touch screen remains unresponsive after recalibration, the touch overlay may need to be replaced.

Project transfer from PC to panel fails

Confirm the panel is set to Transfer mode. Verify the selected transfer channel (MPI, Ethernet, USB) matches the physical connection. Check PC firewall settings if using Ethernet transfer.

Switch the panel to Transfer mode via the Start Center. Ensure WinCC flexible Transfer settings match the physical interface. Disable PC firewall temporarily to rule out blocking. Try an alternative transfer interface if available.

Panel reboots repeatedly or freezes during operation

Check the 24 V DC supply for voltage drops or ripple, which can cause instability. Review the project for memory overload or script errors that may cause runtime crashes.

Stabilize the power supply and ensure adequate current capacity. Optimize the WinCC flexible project to reduce memory usage. Update the panel firmware to the latest compatible version and reload the project.

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