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

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

€ 2.495,00

Condition

Clear

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

Description
Additional information

The Siemens 6AV6446-1AA40-1BB4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level visualization and operator control tasks. This panel is part of Siemens' high-performance Multi Panel series, offering a 12-inch TFT display and running the Windows CE operating system with WinCC flexible runtime. It serves as a powerful operator interface for process visualization, machine control, and status monitoring in industrial environments.

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, making it versatile for various operator interaction styles. It is equipped with MPI/PROFIBUS DP and RS-422/RS-485 interfaces as standard, with optional PROFINET/Ethernet connectivity, enabling integration into a wide range of automation networks. The panel includes 12 MB of user memory for project data and supports CF card slots for expanded storage and project transfer. Its robust industrial-grade housing is rated IP65 on the front panel, ensuring protection against dust and water ingress.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, chemical processing, and packaging industries where reliable and flexible HMI solutions are required. Its compatibility with Siemens S7-300, S7-400, and other SIMATIC controllers makes it a natural fit for existing Siemens automation architectures. The combination of touch and function key operation, along with its large display, makes it suitable for complex process visualization applications requiring detailed graphical representation and operator interaction.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT Color LCD
Display Colors	256 colors
Touch Technology	Resistive touchscreen with function keys
Operating System	Windows CE
User Memory	12 MB
Input/Operating Voltage	24 V DC
Power Consumption	30 W (typical)
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, Ethernet (RJ45)
IP/Protection Rating	IP65 (front), IP20 (rear)
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
Series/Product Family	SIMATIC HMI Multi Panel MP 370

Common Error Codes & System Events

Event ID: 040000: Communication error between HMI panel and PLC controller. The configured connection to the controller cannot be established or has been interrupted.
Check MPI/PROFIBUS DP or Ethernet cable connections and termination resistors. Verify the PLC address and communication parameters in WinCC flexible match the hardware configuration. Ensure the PLC is in RUN mode.
Event ID: 060000: Tag read error. The HMI panel is unable to read a configured tag from the connected controller.
Verify the tag address configured in WinCC flexible is correct and exists in the PLC program. Check that the data block or memory area referenced is present and accessible in the controller.
Event ID: 070000: Tag write error. The HMI panel is unable to write a value to a configured tag in the connected controller.
Check that the target tag address is correct and writable. Ensure the PLC is not in a state that prevents write access, and verify communication link integrity.
Event ID: 080000: Project download error. Transfer of the WinCC flexible project to the panel has failed or been interrupted.
Verify the transfer cable or network connection between the engineering PC and the panel. Ensure the panel is in Transfer mode and that the correct communication interface is selected in WinCC flexible.
Event ID: 100000: Insufficient memory. The panel does not have enough free memory to load or run the current project.
Reduce the project size by optimizing graphics and scripts. Delete unused project data from the panel memory or CF card. Consider archiving old alarm logs and trend data.
Event ID: 110000: CF card not found or not accessible. The panel cannot read from or write to the inserted CompactFlash card.
Remove and reinsert the CF card. Verify the card is properly formatted (FAT) and not write-protected. Replace the CF card if the error persists.
Event ID: 120000: Alarm buffer overflow. The number of pending alarms has exceeded the configured alarm buffer capacity.
Acknowledge and clear existing alarms. Increase the alarm buffer size in the WinCC flexible project configuration if overflow occurs frequently.

Frequently Asked Questions

What communication interfaces are available on the 6AV6446-1AA40-1BB4?

The MP 370 12-inch panel provides MPI/PROFIBUS DP and RS-422/RS-485 interfaces as standard. An Ethernet (RJ45) interface is also available for PROFINET and TCP/IP-based communication with controllers and engineering stations.

Is the Siemens MP 370 compatible with S7-300 and S7-400 PLCs?

Yes, the MP 370 is fully compatible with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with S7-1200 and S7-1500 controllers via Ethernet using appropriate WinCC flexible configurations.

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

The MP 370 is configured using Siemens WinCC flexible engineering software. Projects are created on a PC and transferred to the panel via MPI, PROFIBUS, Ethernet, or CF card.

What is the supply voltage for the 6AV6446-1AA40-1BB4?

The panel operates on 24 V DC supply voltage. Ensure the power supply is adequately rated for the panel's power consumption of approximately 30 W.

Can the MP 370 operate as both a touch panel and a keypad panel?

Yes, the MP 370 12-inch variant supports both touchscreen input and physical function keys, allowing flexible operator interaction depending on the application requirements.

Troubleshooting

Display remains blank after power on

Check that 24 V DC supply voltage is present at the power connector. Measure voltage at the panel terminals and verify polarity. Inspect the internal fuse if accessible.

Restore correct 24 V DC supply. If voltage is present but display remains blank, the backlight or internal power supply board may have failed and the panel should be sent for repair or the backlight unit replaced.

Panel repeatedly reboots or freezes during operation

Check for voltage fluctuations on the 24 V DC supply line. Inspect the CF card for errors and verify the WinCC flexible project is not corrupted. Monitor ambient temperature to ensure it is within the 0 °C to +50 °C operating range.

Stabilize the power supply and ensure adequate current capacity. Replace or reformat the CF card and reload the project. If overheating is suspected, improve panel enclosure ventilation.

Communication loss with PLC (connection error displayed on screen)

Verify MPI/PROFIBUS DP or Ethernet cable integrity and connector seating. Check that the PLC address and baud rate configured in WinCC flexible match the actual hardware settings. Confirm PROFIBUS termination resistors are correctly placed at bus ends.

Replace faulty cables or connectors. Correct any address or baud rate mismatches in the WinCC flexible project and reload the project to the panel. Ensure proper PROFIBUS bus termination.

Touchscreen does not respond or responds inaccurately

Attempt touchscreen recalibration through the panel's Start Center or Control Panel. Check for physical damage or contamination on the touch surface.

Recalibrate the touchscreen using the built-in calibration utility in the Windows CE Control Panel. Clean the screen surface with a soft, dry cloth. If calibration fails repeatedly, the touch overlay may require replacement.

Project cannot be transferred to the panel from the engineering PC

Verify the panel is set to Transfer mode via the Start Center. Check the communication cable or Ethernet connection between the PC and panel. Confirm the correct interface and IP address or MPI address are selected in WinCC flexible Transfer settings.

Switch the panel to Transfer mode manually. Replace the transfer cable if faulty. Correct the interface settings in WinCC flexible and retry the transfer. Ensure no firewall is blocking the connection when using Ethernet.

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