Siemens 6AV6446-1AA40-2BB5 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-2BB5 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-2BB5
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1AA40-2BB5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-2BB5 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and process visualization tasks. It features a 12-inch TFT display and operates as a high-performance operator panel within Siemens' WinCC flexible runtime environment. This unit is part of the SIMATIC MP 370 series, which bridges the gap between compact operator panels and full PC-based HMI systems.

The MP 370 (6AV6446-1AA40-2BB5) is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation. It runs on a Windows CE operating system and supports WinCC flexible runtime for project execution. Communication interfaces include MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration into a wide range of Siemens and third-party automation architectures. The panel provides onboard flash memory for project storage and supports USB ports for data transfer and peripheral connectivity.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, and process industries where robust, mid-range HMI capability is required at the machine level. Its combination of touch operation, network connectivity, and compatibility with S7-300 and S7-400 PLCs makes it suitable for complex visualization tasks on production lines, packaging machines, and process control panels. The panel's industrial-grade construction ensures reliable operation in environments with elevated temperatures, vibration, and electrical noise.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color
Display Resolution	800 x 600 pixels (SVGA)
Touch Technology	Resistive Touch Screen
Operating System	Windows CE
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), USB
Memory	Onboard Flash Memory for project storage
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
Series/Product Family	SIMATIC MP 370

Common Error Codes & System Events

Event ID: 10000: Connection to PLC lost or communication timeout on configured connection.
Check MPI/PROFIBUS/Ethernet cable connections and termination resistors. Verify PLC is powered and in RUN mode. Check configured communication parameters in WinCC flexible project.
Event ID: 10001: Communication error on a configured PLC connection; tags cannot be read or written.
Verify the communication interface settings (baud rate, station address) match the PLC configuration. Inspect cables and connectors for damage.
Event ID: 20000: Project download failed or project file is incompatible with the panel firmware version.
Ensure the WinCC flexible version used to create the project matches the firmware on the MP 370. Perform a firmware update if necessary and re-download the project.
Event ID: 40000: Internal device error or hardware fault detected during self-test at startup.
Perform a panel reset. If the error persists, check the 24 V DC supply voltage. Contact Siemens technical support or arrange for hardware inspection and repair.
Event ID: 50000: Flash memory write error; project or recipe data could not be saved to internal storage.
Check available storage space on the panel. Transfer data to a USB device. If the error persists, the internal flash memory may require replacement.
Event ID: 70000: License error; WinCC flexible runtime license is missing or invalid on the panel.
Verify that the correct WinCC flexible runtime license is installed on the panel. Use the Automation License Manager to transfer or restore the license.
Event ID: 80000: Screen saver or backlight timeout has activated; display appears blank.
Touch the screen or press any key to deactivate the screen saver. Adjust screen saver settings in the panel's Control Panel if the timeout is too short.

Frequently Asked Questions

What PLC families are compatible with the SIMATIC MP 370 (6AV6446-1AA40-2BB5)?

The MP 370 is compatible with Siemens S7-300, S7-400, and S7-200 PLCs via MPI or PROFIBUS DP interfaces, as well as Ethernet-capable controllers via TCP/IP. Third-party PLCs can also be connected using supported communication drivers in WinCC flexible.

What software is required to configure and program this panel?

The MP 370 is configured using Siemens WinCC flexible software. The project must be created with a WinCC flexible version compatible with the panel's firmware version and then downloaded to the panel via Ethernet, MPI, or USB.

What is the supply voltage for the 6AV6446-1AA40-2BB5?

The panel requires a 24 V DC power supply. Ensure the supply is stable and within the specified tolerance range to prevent operational faults.

Can the MP 370 operate as a standalone HMI without a PLC connection?

The MP 370 can run its project and display screens without an active PLC connection, but dynamic data exchange and tag updates require a live PLC connection. Offline simulation is possible during project development in WinCC flexible.

What is the front panel protection rating of this unit?

The front panel of the SIMATIC MP 370 carries an IP65 protection rating, making it suitable for installation in control cabinet doors where it may be exposed to dust and water spray.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the supply is within tolerance and that the power LED or status indicator is active. Check whether the screen saver has activated.

Restore correct 24 V DC supply if voltage is out of range. If the screen saver is active, touch the screen to wake the display. If the backlight is faulty, the backlight unit or the entire panel may require replacement.

Panel fails to communicate with S7 PLC via MPI or PROFIBUS

Verify MPI/PROFIBUS cable connections and check that termination resistors are correctly placed at both ends of the bus. Confirm that the station address and baud rate configured on the panel match the PLC settings.

Correct any wiring faults and ensure proper bus termination. Update the communication parameters in the WinCC flexible project to match the PLC configuration, then re-download the project to the panel.

Project download fails from WinCC flexible engineering station

Check the communication link between the PC and the panel (Ethernet or MPI). Verify that the WinCC flexible version is compatible with the panel firmware version. Check for firewall or network configuration issues blocking the transfer.

Update the panel firmware to match the WinCC flexible version if there is a version mismatch. Disable firewalls temporarily during download or configure the correct port. Use a direct Ethernet connection rather than a network switch if issues persist.

Touchscreen does not respond accurately or is misaligned

The touchscreen calibration may have drifted. Access the panel's Control Panel via the Start menu on Windows CE and navigate to the touchscreen calibration utility.

Perform a touchscreen recalibration using the built-in calibration tool in the Windows CE Control Panel. If the touchscreen remains unresponsive after calibration, the touch overlay may be damaged and require hardware replacement.

Panel repeatedly restarts or shows a watchdog reset error

This may indicate a corrupted project file, insufficient 24 V DC supply under load, or a hardware fault. Check the supply voltage under operating load conditions and attempt to reload the project.

Ensure the 24 V DC power supply is adequately rated for the panel's power consumption. Re-download a known-good project from WinCC flexible. If restarts continue, perform a factory reset via the panel's loader menu and re-download the project. If the issue persists, the panel hardware requires inspection.

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