Siemens 6AV6446-3AA41-1BY3 SIMATIC MP 370

Name: Siemens 6AV6446-3AA41-1BY3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-3AA41-1BY3
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-3AA41-1BY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA41-1BY3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and process visualization tasks. This unit features a 12-inch TFT color display and operates as a high-performance operator panel within Siemens' WinCC flexible runtime environment. It is part of the SIMATIC MP 370 series, which bridges the gap between compact operator panels and full PC-based SCADA systems.

The MP 370 (6AV6446-3AA41-1BY3) is equipped with a touch-sensitive screen interface and supports multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling flexible integration into existing automation architectures. The panel runs on a Windows CE operating system and supports WinCC flexible runtime for project execution. It provides substantial onboard memory for project data and supports USB ports for data transfer and peripheral connectivity. The unit operates on a 24 V DC supply and is built to industrial standards with an IP65 front panel protection rating.

The SIMATIC MP 370 is widely deployed in manufacturing automation, machine building, and process industries where a robust and versatile HMI solution is required. Its compatibility with Siemens S7-300 and S7-400 PLCs via MPI and PROFIBUS makes it a natural fit for existing Siemens-based control architectures. Typical applications include packaging machinery, press lines, conveyor systems, and general-purpose industrial machine control panels.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color
Display Resolution	800 x 600 px (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Operating System	Windows CE
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
USB Ports	2 x USB
IP/Protection Rating	IP65 (front panel)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mounting
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 cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Check that the PLC is in RUN mode.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI lost communication with the controller.
Inspect physical cabling for damage or loose connectors. Verify network settings and PLC address. Restart both the HMI and PLC if necessary.
Event ID: 20000: Project download error. The project could not be transferred to the HMI panel.
Verify the transfer cable or Ethernet connection is properly seated. Ensure WinCC flexible is set to the correct transfer mode and the panel is in transfer mode.
Event ID: 40000: System memory low. Available runtime memory is insufficient for the loaded project.
Reduce the project size by optimizing graphics and scripts. Clear unused data logs and alarm buffers. Consider archiving historical data to external storage.
Event ID: 50000: Internal device error or hardware fault detected during self-test.
Perform a full power cycle. If the error persists, back up the project and perform a factory reset. Contact Siemens technical support if the fault recurs.
Event ID: 70000: Configuration error. A tag or screen object references a variable that does not exist or is incorrectly configured.
Open the project in WinCC flexible and check all tag connections. Recompile and re-download the project to the panel.
Event ID: 30000: Data log write error. The HMI was unable to write data to the configured logging destination.
Check available storage space on the target medium (internal flash or USB). Verify the data log configuration in WinCC flexible and ensure the storage path is valid.

Frequently Asked Questions

Which communication interfaces does the 6AV6446-3AA41-1BY3 support?

The MP 370 supports MPI, PROFIBUS DP, Ethernet (TCP/IP), and RS-422/485 serial interfaces, allowing connection to a wide range of Siemens and third-party controllers.

Is this HMI panel compatible with Siemens S7-300 and S7-400 PLCs?

Yes, the SIMATIC MP 370 is fully compatible with S7-300 and S7-400 PLCs via MPI or PROFIBUS DP connections, and can also communicate over Ethernet with S7 controllers that support TCP/IP.

What software is required to program or configure this panel?

The MP 370 is configured using Siemens WinCC flexible (standard or advanced edition). Projects are compiled in WinCC flexible and downloaded to the panel via Ethernet, MPI, or USB.

What is the operating voltage for this panel?

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

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

The front panel of the MP 370 carries an IP65 protection rating, making it suitable for installation in environments where dust and water jets may be present.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check the internal fuse and verify the power supply unit is functioning correctly.

Replace the power supply or internal fuse if voltage is absent or out of range. If voltage is correct but display remains blank, the backlight inverter or TFT panel may require replacement.

Touchscreen does not respond or responds inaccurately

Check for physical damage to the touch surface. Attempt a touchscreen recalibration through the panel's Start Center or control panel settings.

Recalibrate the touchscreen using the built-in calibration utility. If calibration fails or touch remains unresponsive, the resistive touch overlay may need to be replaced.

HMI cannot establish communication with the PLC

Verify MPI or PROFIBUS cable integrity and check that termination resistors are correctly placed at both ends of the bus. Confirm the PLC address in the HMI project matches the physical PLC setting.

Replace or re-seat the communication cable. Correct the PLC address in the WinCC flexible project and re-download. Ensure the PLC is powered and in RUN mode.

Panel freezes or restarts unexpectedly during operation

Check the 24 V DC supply for voltage dips or instability. Review the Windows CE event log for software exceptions or memory errors.

Stabilize the power supply and ensure adequate current capacity. If software-related, reload the WinCC flexible runtime project. A factory reset followed by a clean project download may resolve persistent instability.

Project transfer fails from engineering PC to panel

Confirm the panel is set to Transfer mode via the Start Center. Verify the Ethernet or MPI connection between the PC and panel. Check firewall settings on the engineering PC.

Switch the panel to Transfer mode manually. Use the correct IP address or MPI address in WinCC flexible transfer settings. Disable PC firewall temporarily to rule out network blocking issues.

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