Siemens 6AV6446-1AA40-0BB4 SIMATIC MP 370

Name: Siemens 6AV6446-1AA40-0BB4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA40-0BB4
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1AA40-0BB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA40-0BB4 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 (6AV6446-1AA40-0BB4) is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation. It runs WinCC flexible runtime software and features interfaces including MPI/PROFIBUS DP, RS-422/RS-485, and Ethernet (10/100 Mbit/s), enabling integration with a wide range of Siemens S7 PLCs and third-party controllers. The unit includes a CompactFlash card slot for project storage and data logging, and operates on a 24 V DC supply.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, process industries, and factory automation where a robust, mid-to-large format HMI with reliable communication to SIMATIC S7-300 and S7-400 controllers is required. Its combination of touch input, multiple communication interfaces, and WinCC flexible compatibility makes it suitable for complex visualization tasks involving trend displays, alarm management, and recipe handling across a broad range of industrial machinery.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color
Display Resolution	800 x 600 pixels (SVGA)
Touch Technology	Resistive Touch Screen
Input Voltage	24 V DC
Operating Voltage Range	19.2 – 28.8 V DC
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, Ethernet 10/100 Mbit/s
Memory	CompactFlash card slot (external 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
IP Rating (Rear)	IP20
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI Multi Panel (MP 370)
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been interrupted.
Check MPI/PROFIBUS DP or Ethernet cabling and connector integrity. Verify PLC address settings match the HMI project configuration. Confirm the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC timed out. No response received from the controller within the configured timeout period.
Check network cable and bus termination resistors. Verify baud rate and station address settings on both HMI and PLC. Restart both devices if the issue persists.
Event ID: 20000: Project download error. Transfer of the WinCC flexible project to the panel failed.
Verify the transfer cable or Ethernet connection between the engineering PC and the panel. Ensure the panel is set to Transfer mode before initiating download. Check that WinCC flexible version is compatible with the panel firmware.
Event ID: 40000: Tag read/write error. A configured variable (tag) could not be read from or written to the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address conflicts or data type mismatches.
Event ID: 50000: System memory low. The panel's available runtime memory is critically low.
Reduce the number of active screens or objects loaded simultaneously. Optimize the WinCC flexible project by removing unused tags, scripts, or graphic objects. Consider archiving data logs to CompactFlash.
Event ID: 70000: CompactFlash card error. The inserted CompactFlash card cannot be read or written.
Remove and reinsert the CompactFlash card. Replace the card if it is corrupted or incompatible. Ensure the card is formatted correctly (FAT16/FAT32) and is a supported capacity.
Event ID: 110000: Firmware update error. The firmware update process on the panel was interrupted or failed.
Restart the panel and reattempt the firmware update using the correct firmware version for the MP 370. Use a reliable Ethernet or serial connection and ensure power is stable during the update process.

Frequently Asked Questions

What PLC systems are compatible with the SIMATIC MP 370 (6AV6446-1AA40-0BB4)?

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 communication with S7-200 and third-party controllers via RS-422/RS-485 serial interfaces, and Ethernet-capable controllers using the integrated 10/100 Mbit/s network port.

What software is required to program or configure this HMI panel?

The 6AV6446-1AA40-0BB4 is configured using Siemens WinCC flexible engineering software. The project is created on a PC and then transferred to the panel via Ethernet, MPI, or serial connection.

Does the MP 370 support touch screen input?

Yes, the 6AV6446-1AA40-0BB4 features a resistive touch screen that covers the full 12-inch display area, allowing operator interaction directly on-screen without the need for external function keys for navigation.

What is the supply voltage for the Siemens MP 370?

The panel operates on 24 V DC with an acceptable input range of 19.2 V DC to 28.8 V DC. An external 24 V DC power supply meeting this specification must be provided.

Can the MP 370 log data and store recipes?

Yes, the MP 370 supports data logging and recipe management through WinCC flexible. Data can be stored on the internal memory or on an externally inserted CompactFlash card for extended storage capacity.

Troubleshooting

Display remains blank after power on

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

Correct the supply voltage if out of range. Replace the power supply if it is faulty. If voltage is correct and display remains blank, the backlight inverter or display assembly may require replacement.

HMI panel shows 'No connection to PLC' or communication error on startup

Verify the MPI/PROFIBUS DP or Ethernet cable is securely connected at both the panel and PLC ends. Check bus termination at both ends of the PROFIBUS segment. Confirm the PLC station address and baud rate match the HMI project settings.

Replace or reseat the communication cable. Correct address and baud rate settings in the WinCC flexible project and re-download. Ensure bus termination resistors are correctly installed on the PROFIBUS network.

Touch screen does not respond or registers incorrect touch positions

Check for physical damage or contamination on the touch screen surface. Attempt to recalibrate the touch screen via the panel's system settings menu.

Clean the touch screen surface with a soft, dry cloth. Perform a touch screen calibration through the Control Panel accessible in Transfer mode or via the Start Center. If calibration fails repeatedly, the touch screen overlay may need replacement.

Panel fails to enter Transfer mode or cannot receive project download

Confirm the panel is set to Transfer mode via the Start Center. Check the Ethernet or MPI cable connection between the engineering PC and the panel. Verify firewall settings on the PC are not blocking the transfer.

Restart the panel and select Transfer from the Start Center before initiating the download in WinCC flexible. Disable PC firewall temporarily during transfer. Use a direct Ethernet crossover cable or verified MPI adapter if network transfer is unreliable.

CompactFlash card not recognized by the panel

Remove the CompactFlash card and inspect the card slot contacts for damage or contamination. Test the card in another device to verify it is functional.

Clean the card contacts and reinsert firmly. Reformat the card to FAT16 or FAT32 if it is not recognized. Replace the CompactFlash card with a compatible industrial-grade card if the issue persists.

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