Siemens 6AV6446-1AA40-2BB4 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-2BB4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-2BB4
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1AA40-2BB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-2BB4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI product family from Siemens. It is a high-performance operator panel designed for demanding industrial human-machine interface applications, offering a 12-inch TFT display and running on the Windows CE operating system. This panel is part of the SIMATIC MP 370 series, which bridges the gap between standard operator panels and full PC-based systems.

The MP 370 features a 12.1-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports both touch and key operation depending on the variant. It is equipped with communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration into a wide range of Siemens and third-party automation architectures. The panel runs WinCC flexible runtime software and offers expandable memory via CompactFlash card slots, along with USB ports for peripheral connectivity. Its robust industrial housing is rated to IP65 on the front face, making it suitable for panel-mount installations in harsh environments.

The SIMATIC MP 370 is widely deployed in manufacturing automation, process control, and machine building applications across industries such as automotive, food and beverage, chemical processing, and packaging. Its combination of a large display area, flexible communication options, and Windows CE-based runtime environment makes it well suited for complex visualization tasks requiring trend displays, alarm management, and recipe handling on the factory floor.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors (TFT)
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), RS-422/485
Memory	Expandable via CompactFlash card
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 mount
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 040000: Configuration error detected during startup; the project file may be corrupted or incompatible with the runtime version.
Reload the WinCC flexible project via ProSave or the Transfer function. Verify the project was compiled with a compatible WinCC flexible version.
Event ID: 060000: Communication error on MPI or PROFIBUS DP interface; connection to the PLC has been lost.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the bus address settings on both the panel and the PLC. Check for cable damage or incorrect baud rate configuration.
Event ID: 070000: Ethernet communication fault; the panel cannot establish a TCP/IP connection to the configured controller or network device.
Verify IP address, subnet mask, and gateway settings on the panel. Check physical Ethernet cable and switch/hub connectivity. Confirm the PLC or server is reachable on the network.
Event ID: 080000: Tag read/write error; a configured variable cannot be read from or written to the connected controller.
Check the PLC program to ensure the data block or address referenced by the tag still exists. Verify communication is active and the tag address is correctly configured in WinCC flexible.
Event ID: 100000: System memory low warning; available RAM on the panel is critically low.
Reduce the number of active screens or objects. Check for memory leaks in scripts. Consider reducing the project size or upgrading the CompactFlash card.
Event ID: 110000: Transfer mode active; the panel is waiting for a project download from the engineering PC.
If unintentional, restart the panel. If intentional, proceed with the project transfer from WinCC flexible via the configured transfer channel (Ethernet, MPI, or USB).
Event ID: 120000: Internal file system error; the CompactFlash card may be corrupted or missing.
Check that the CompactFlash card is properly seated. Reformat the card using ProSave if necessary. Replace the CompactFlash card if the error persists.

Frequently Asked Questions

What software is used to configure and program the MP 370?

The SIMATIC MP 370 is programmed using Siemens WinCC flexible engineering software. Projects are transferred to the panel via Ethernet, MPI, PROFIBUS, or USB using the ProSave tool or the integrated transfer function.

What communication protocols does the 6AV6446-1AA40-2BB4 support?

This panel supports MPI, PROFIBUS DP, Ethernet TCP/IP, and RS-422/485 serial communication, allowing connectivity to Siemens S7-300, S7-400, and other compatible controllers.

Is the MP 370 compatible with Siemens S7-1200 or S7-1500 PLCs?

The MP 370 running WinCC flexible has limited compatibility with S7-1200 and S7-1500 PLCs. For full integration with these newer controllers, Siemens recommends using SIMATIC Comfort Panels with TIA Portal instead.

What is the operating voltage of the 6AV6446-1AA40-2BB4?

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

Can the CompactFlash card be used to back up and restore projects?

Yes, the CompactFlash card can be used to store the runtime project, log data, and recipes. Projects can be backed up and restored using the ProSave utility or directly via the panel's control panel interface.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel's power connector. Check the internal fuse if accessible. Observe whether the backlight is off or the display shows no image at all.

Ensure the 24 V DC supply is stable and within tolerance. If the backlight has failed, the backlight inverter or the display assembly may need replacement. If no power is detected internally, inspect the power supply board.

Panel boots to Transfer mode unexpectedly

The panel may have been set to Transfer mode manually or the project on the CompactFlash card is missing or corrupted.

Check the CompactFlash card for a valid project file. Use ProSave to reload the project. If the panel repeatedly enters Transfer mode, reformat the CompactFlash card and perform a fresh project transfer.

Touchscreen does not respond or is misaligned

The touch calibration may have drifted, or the resistive touch overlay may be damaged. Access the Windows CE control panel to check touch settings.

Recalibrate the touchscreen via the Windows CE control panel under Start > Settings > Control Panel > Touch. If calibration does not resolve the issue, the touch overlay assembly may need to be replaced.

Communication loss with PLC on PROFIBUS DP

Check the PROFIBUS cable connections, bus termination at both ends, and the panel's configured bus address. Use a PROFIBUS diagnostic tool to check bus integrity.

Verify that the PROFIBUS DP address on the panel matches the configuration in WinCC flexible. Ensure termination resistors are active only at the physical ends of the bus. Replace damaged cables or connectors as needed.

Panel freezes or restarts unexpectedly during operation

This may be caused by a corrupted project, insufficient memory, or a hardware fault. Check the system event log on the panel for recorded error events.

Reload the WinCC flexible project after recompiling it in the engineering software. Reduce project complexity if memory warnings are present. If the issue persists after software remediation, inspect the main board for hardware faults or consider a unit replacement.

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