Siemens 6AV6446-4AA40-0BY4 SIMATIC MP 370

Name: Siemens 6AV6446-4AA40-0BY4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-4AA40-0BY4
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-4AA40-0BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-4AA40-0BY4 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 is part of Siemens' high-performance operator panel series, offering robust human-machine interface capabilities for industrial environments. The MP 370 series bridges the gap between compact operator panels and full PC-based visualization systems.

The 6AV6446-4AA40-0BY4 variant is equipped with a touch-sensitive screen interface, supporting operation via direct touch input on the display surface. It runs on the WinCC flexible runtime environment, providing a powerful and flexible platform for HMI project execution. Communication is supported via MPI, PROFIBUS DP, and Ethernet interfaces, enabling integration with SIMATIC S7 PLCs and other automation systems. The panel includes onboard flash memory for project and recipe storage, and supports USB ports for data transfer and peripheral connectivity.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and chemical process industries. Its large display area and touch operation make it suitable for applications requiring detailed process visualization, trend displays, and alarm management at the machine or line level. The panel's compatibility with the SIMATIC S7 controller family and WinCC flexible engineering software makes it a natural fit for Siemens-based automation architectures.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color LCD
Display Colors	256 colors
Display Resolution	640 x 480 px (VGA)
Touch Technology	Resistive touch screen
Input Voltage	24 V DC
Power Consumption	Max. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45), USB
Operating System	Windows CE
Runtime Software	WinCC flexible Runtime
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
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 1000: Connection to PLC lost or communication timeout on configured connection.
Check MPI/PROFIBUS/Ethernet cabling and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both HMI and PLC if necessary.
Event ID: 10000: Project download failed or project file is corrupt.
Re-transfer the project from the engineering PC using WinCC flexible. Ensure the project was compiled without errors before transfer.
Event ID: 20000: Tag read/write error — the HMI cannot read or write a configured PLC tag.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory area. Check PLC program for address conflicts.
Event ID: 40000: Flash memory write error or storage capacity exceeded.
Delete unused recipes, logs, or archived data from the panel memory. If the error persists, perform a memory reset and re-download the project.
Event ID: 50000: System runtime error — WinCC flexible runtime has encountered an internal fault.
Restart the HMI panel. If the fault recurs, reinstall the WinCC flexible runtime image using a USB recovery image or ProSave tool.
Event ID: 70000: Date and time not set or RTC battery low — system clock has lost its settings.
Set the correct date and time via the Control Panel. Replace the internal RTC backup battery if the clock repeatedly resets after power loss.
Event ID: 110000: USB device not recognized or unsupported USB peripheral connected.
Disconnect the USB device and reconnect. Use only USB devices compatible with Windows CE. Avoid USB hubs where possible.

Frequently Asked Questions

What PLC systems is the 6AV6446-4AA40-0BY4 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, through WinCC flexible drivers, can connect to third-party controllers.

What engineering software is required to program this panel?

The panel is configured using Siemens WinCC flexible engineering software. The project is compiled on a PC and transferred to the panel via Ethernet, MPI, or USB.

What is the supply voltage for the MP 370?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range and adequately rated for the panel's power consumption.

Can the MP 370 display be operated by touch only, or does it require a keyboard?

The 6AV6446-4AA40-0BY4 variant features a resistive touch screen and can be operated entirely by touch input. An external USB keyboard can also be connected for alphanumeric entry if required.

Is it possible to update the firmware or runtime on this panel?

Yes, the WinCC flexible runtime and panel firmware can be updated using the Siemens ProSave tool, either via Ethernet or USB connection from a PC.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector. Verify the supply polarity is correct and the voltage is within tolerance. Inspect the internal fuse if accessible.

Correct any wiring or supply issues. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight inverter may be faulty and require replacement.

Touch screen does not respond or registers incorrect touch positions

Check whether the touch screen is physically damaged or contaminated. Access the touch calibration utility via the Windows CE Control Panel to determine if calibration has drifted.

Clean the touch surface with a soft, dry cloth. Recalibrate the touch screen using the calibration tool in the Control Panel. If the issue persists after calibration, the touch overlay may need to be replaced.

HMI loses communication with the PLC intermittently

Check MPI or PROFIBUS cable connections, termination resistors at both ends of the bus, and the bus address configuration on both the HMI and PLC. Monitor for electromagnetic interference sources near the cabling.

Reseat all connectors, ensure correct bus termination, and verify address settings in the WinCC flexible project. Use shielded cables and ensure proper grounding to reduce EMI-related communication dropouts.

Panel fails to retain project or settings after power cycle

This typically indicates a depleted RTC/SRAM backup battery or a corrupted flash memory. Check the system event log for memory-related event codes.

Replace the internal backup battery. If flash memory corruption is suspected, perform a full memory reset using ProSave and re-download the project from the engineering PC.

WinCC flexible runtime crashes or restarts unexpectedly

Check available panel memory and ensure the project does not exceed the panel's memory capacity. Review the system event log for runtime error event IDs.

Optimize the project to reduce memory usage. Update the panel firmware and runtime to the latest compatible version using ProSave. If crashes persist, perform a clean reinstallation of the runtime image.

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