Siemens 6AV6446-1AA41-0BB4 SIMATIC MP 370

Name: Siemens 6AV6446-1AA41-0BB4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1AA41-0BB4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-1AA41-0BB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1AA41-0BB4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding visualization and operator control tasks in industrial automation environments. 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 machine and plant automation.

The MP 370 (6AV6446-1AA41-0BB4) is equipped with a 12" TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation. It runs on a Windows CE-based operating system and is compatible with WinCC flexible runtime software for configuration and visualization. The panel provides multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration into a wide range of Siemens and third-party control architectures. It features a robust industrial-grade housing suitable for front-panel mounting with an IP65 protection rating on the front face.

The SIMATIC MP 370 is widely deployed in machine tool automation, packaging machinery, automotive manufacturing lines, and process plant control rooms. Its combination of a large color touch display, flexible communication options, and compatibility with SIMATIC S7 PLCs makes it well suited for applications requiring detailed process visualization, recipe management, and alarm handling. The panel is also used in water treatment, energy management, and conveyor system applications where a reliable and versatile HMI interface is required.

Technical Specifications

Display Size	12 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	Max. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-232, RS-422/485
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Front panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC Multi Panel MP 370

Common Error Codes & System Events

Event ID: 10000: Connection to the PLC could not be established or was interrupted during runtime.
Check MPI/PROFIBUS/Ethernet cable connections and verify PLC address settings in the WinCC flexible project. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Communication timeout between the HMI panel and the configured PLC controller.
Verify network configuration, check baud rate settings, and confirm the PLC station address matches the HMI project configuration.
Event ID: 20000: Project download failed or project data is corrupted on the panel.
Re-transfer the WinCC flexible project to the panel using ProSave or WinCC flexible. Check available memory on the panel before transfer.
Event ID: 40000: System memory low — available RAM on the panel is critically low during runtime.
Reduce the number of active screens, limit open trend views, and check for memory leaks in scripts. Consider restarting the panel.
Event ID: 50000: Internal panel error or hardware fault detected during self-diagnostics.
Perform a panel restart. If the fault persists, back up the project and perform a factory reset via the Control Panel. Contact Siemens support if unresolved.
Event ID: 60000: Backup battery low or battery failure detected.
Replace the internal backup battery (CR2032 or equivalent as specified in the device manual) to prevent loss of time/date settings and retentive data.
Event ID: 70000: Screen saver or display backlight fault — display does not illuminate correctly.
Check backlight settings in the Control Panel. If the backlight has failed, the display unit or backlight inverter may require replacement.
Event ID: 30000: Tag or variable limit violation — a monitored process value has exceeded its configured high or low limit.
Acknowledge the alarm in the HMI alarm view. Investigate the corresponding process value in the PLC and correct the process condition causing the limit violation.

Frequently Asked Questions

Which PLC families is the SIMATIC MP 370 compatible with?

The MP 370 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, and also supports Ethernet-based communication with S7 controllers. It can also be configured for use with third-party PLCs via serial interfaces using appropriate drivers in WinCC flexible.

What software is required to configure and program this panel?

The MP 370 is configured using Siemens WinCC flexible (2004 or later versions). Projects are transferred to the panel via Ethernet, MPI, or USB using the ProSave tool or directly from WinCC flexible.

What is the input voltage requirement for the 6AV6446-1AA41-0BB4?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current to meet the panel's maximum power consumption of approximately 30 W.

Does this panel support recipe management and data logging?

Yes, the SIMATIC MP 370 supports recipe management, trend displays, alarm logging, and data logging functions when configured with WinCC flexible runtime.

What is the front panel protection rating of this unit?

The front face of the MP 370 achieves 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 is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the supply polarity is correct and that the supply can deliver adequate current. Inspect the backlight by shining an external light on the screen to check for faint image.

If supply voltage is correct and the backlight has failed, the display or backlight inverter assembly requires replacement. If no voltage is present, check the external power supply and wiring. Replace the internal fuse if blown.

Panel fails to communicate with the S7 PLC via MPI or PROFIBUS

Verify the MPI/PROFIBUS cable is correctly connected and terminated. Check the station address configured on the panel matches the project settings. Use a PROFIBUS diagnostic tool to check bus integrity and baud rate.

Correct any address conflicts, ensure proper bus termination resistors are in place at both ends of the bus, and re-download the HMI project if configuration settings were changed.

Touch screen does not respond accurately or is misaligned

Attempt to recalibrate the touch screen via the Siemens Control Panel on the panel (Start > Settings > Control Panel > Touch). Check for physical damage or contamination on the screen surface.

Perform a touch screen recalibration. If calibration does not resolve the issue, clean the screen surface with a soft cloth. If the touch layer is damaged, the touch screen assembly requires replacement.

Panel repeatedly reboots or freezes during operation

Check the supply voltage for stability and ripple. Review the WinCC flexible project for script errors or excessive memory usage. Check the operating temperature of the installation environment.

Ensure the 24 V DC supply is stable and within specification. Optimize the WinCC flexible project to reduce memory load. If the panel continues to reboot, perform a factory reset and re-transfer the project. Persistent hardware faults may require panel repair or replacement.

Project transfer from WinCC flexible fails or is interrupted

Check the communication cable (Ethernet or MPI) between the engineering PC and the panel. Verify that the panel is in transfer mode and that the correct interface is selected in WinCC flexible's transfer settings.

Restart the panel in transfer mode by accessing the Control Panel loader screen. Ensure firewall or antivirus software on the PC is not blocking the transfer. Try an alternative cable or interface if the problem persists.

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