Siemens 6AV6446-1BA41-1BB4 SIMATIC MP 370

Name: Siemens 6AV6446-1BA41-1BB4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1BA41-1BB4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-1BA41-1BB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1BA41-1BB4 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 control applications.

The MP 370 panel is equipped with a 12-inch TFT color display with a resolution of 800 x 600 pixels (SVGA), supporting 256 colors. It offers both touch screen and key operation capabilities, providing flexible interaction options for operators. The unit communicates via MPI, PROFIBUS DP, and Ethernet interfaces, enabling integration into a wide range of Siemens and third-party control architectures. It runs on a Windows CE operating system and supports WinCC flexible as its configuration software, with onboard Flash memory for project and recipe storage. The panel operates on a 24 V DC supply and is rated IP65 at the front for protection against dust and water ingress.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, chemical, and water treatment industries. Its combination of a large display, robust communication options, and flexible input methods makes it suitable for complex machine visualization tasks where operators require detailed process overviews and recipe management. The panel's IP65 front protection and wide operating temperature range allow installation in harsh industrial environments close to the production process.

Technical Specifications

Display Size	12 inch
Display Type	TFT color
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touch screen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45), RS-422/485
Operating System	Windows CE
Configuration Software	WinCC flexible
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

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 lost.
Check physical connections on MPI/PROFIBUS/Ethernet interface. Verify PLC address settings and baud rate match the WinCC flexible project configuration. Ensure PLC is in RUN mode.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI panel lost communication with the configured controller.
Inspect cable integrity and connector seating. Verify network termination resistors are correctly placed on PROFIBUS. Restart both the HMI panel and the PLC if the connection does not recover automatically.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured tag from the PLC.
Verify that the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check that the PLC program has not been modified to remove or relocate the referenced variable.
Event ID: 20001: Tag write error. A write operation to a PLC tag failed.
Check that the target PLC address is not write-protected. Confirm the data type of the tag in WinCC flexible matches the PLC variable definition. Verify communication link integrity.
Event ID: 40000: Project download error. Transfer of the WinCC flexible project to the panel failed or was interrupted.
Ensure the panel is in Transfer mode before initiating download. Check the PC-to-panel cable or Ethernet connection. Verify that the correct communication channel is selected in WinCC flexible Transfer settings.
Event ID: 50000: Internal system error or runtime application fault on the HMI panel.
Perform a warm restart of the panel. If the fault persists, reload the WinCC flexible project. As a last resort, perform a factory reset and re-download the project.
Event ID: 60000: Flash memory write error. The panel was unable to save data (e.g., recipe or alarm archive) to internal Flash memory.
Check available Flash memory capacity. Delete unused projects or recipe data. If the error persists, the internal Flash memory may be failing and the unit should be sent for repair.

Frequently Asked Questions

What communication interfaces are available on the 6AV6446-1BA41-1BB4?

The MP 370 12-inch panel provides MPI, PROFIBUS DP, Ethernet (RJ45), and RS-422/485 serial interfaces, allowing connection to Siemens S7 PLCs as well as third-party controllers via serial protocols.

Which configuration software is used to program this HMI panel?

The panel is configured using Siemens WinCC flexible, which allows creation of screens, tags, alarms, recipes, and communication connections. The project is then downloaded to the panel via Ethernet or MPI/PROFIBUS.

Is the 6AV6446-1BA41-1BB4 compatible with Siemens S7-300 and S7-400 PLCs?

Yes, the MP 370 supports direct MPI and PROFIBUS DP connections to S7-300 and S7-400 PLCs, as well as Ethernet-based communication to S7 controllers equipped with appropriate communication modules.

What is the front panel protection rating of this unit?

The front face of the MP 370 is rated IP65, providing full protection against dust ingress and resistance to water jets, making it suitable for panel-mount installation in industrial environments.

Can the MP 370 store recipes and alarm logs internally?

Yes, the panel uses internal Flash memory to store project data, recipe records, and alarm archives. The available storage capacity depends on the project size and the volume of runtime data generated.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that polarity is correct and voltage is within the specified range. Inspect the internal fuse if accessible.

Correct any wiring errors or supply voltage issues. If the supply is confirmed good and the display remains blank, the backlight inverter or the display itself may have failed and the unit should be inspected for repair or component replacement.

Touch screen does not respond or registers incorrect touch positions

Check whether the touch screen surface is dirty, wet, or physically damaged. Attempt to recalibrate the touch screen through the panel's Start Center or Service menu.

Clean the touch screen surface with a soft, dry cloth. Perform a touch screen recalibration from the panel's operating system settings. If calibration does not resolve the issue, the touch overlay may require replacement.

HMI panel cannot establish communication with the PLC

Verify the physical cable connections on the MPI or PROFIBUS port. Confirm that the bus address and baud rate configured in WinCC flexible match the settings on the PLC and the network. Check for correct PROFIBUS termination at both ends of the bus.

Correct any address or baud rate mismatches in the WinCC flexible project and re-download. Replace the communication cable if continuity testing reveals a fault. Ensure termination resistors are enabled only at the two physical ends of the PROFIBUS segment.

Panel repeatedly reboots or freezes during runtime

Check the 24 V DC supply for voltage dips or ripple that may cause instability. Review the alarm and event log for system error event IDs. Determine whether the issue is project-related by testing with a minimal project.

Stabilize the power supply and ensure adequate current capacity. Simplify or optimize the WinCC flexible project to reduce CPU load. If the problem persists with a minimal project, the panel hardware may require servicing.

Project download fails or transfer is interrupted

Confirm the panel is set to Transfer mode via the Start Center. Check the Ethernet or MPI cable connection between the programming PC and the panel. Verify firewall or antivirus software is not blocking the WinCC flexible transfer process.

Switch the panel to Transfer mode manually if it does not enter it automatically. Replace the transfer cable if faulty. Temporarily disable firewall or antivirus software on the PC and retry the download. Ensure the WinCC flexible version on the PC is compatible with the panel's firmware version.

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