Siemens 6AV6446-1BA41-2BB3 SIMATIC MP 377

SKU: 6AV6446-1BA41-2BB3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1BA41-2BB3 is a Multi Panel belonging to the SIMATIC MP 377 series, part of Siemens' SIMATIC HMI product line. This unit features a 12-inch TFT display and is designed for demanding machine-level and process visualization tasks. It operates as a standalone HMI panel capable of running WinCC flexible runtime applications.

The MP 377 12" Touch features a 12.1-inch TFT display with a resolution of 800 x 600 pixels (SVGA) and 64,000 colors, combined with a resistive analog touchscreen for operator input. It is powered by a 400 MHz processor and includes 64 MB RAM along with 64 MB flash memory for application storage. Communication interfaces include PROFIBUS DP, PROFINET (Ethernet), USB, and a serial MPI/DP interface, enabling integration into a wide range of automation architectures. The panel operates on 24 V DC and supports CF card slots for additional storage expansion.

The SIMATIC MP 377 is widely deployed in machine automation, automotive manufacturing, food and beverage processing, and chemical plant environments. Its robust construction and broad communication capability make it suitable for integration with Siemens S7-300 and S7-400 PLCs as well as third-party controllers. The panel is commonly used at machine operator stations where reliable process visualization and control input are required.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	64,000 colors
Display Type	TFT LCD
Touch Technology	Resistive analog touchscreen
Input/Operating Voltage	24 V DC
Processor	400 MHz
RAM	64 MB
Flash Memory	64 MB
Communication Interface	PROFIBUS DP, PROFINET (Ethernet RJ45), MPI, USB, CF card slot
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
Mounting	Panel mounting
Series/Product Family	SIMATIC MP 377

Common Error Codes & System Events

Event ID: 10000: System startup event indicating the HMI runtime has initialized successfully.
No action required. Informational event logged at panel startup.
Event ID: 40000: Communication error between the HMI panel and the connected PLC or controller.
Check physical connection cables and connectors. Verify PLC address settings and communication parameters in WinCC flexible project. Ensure PLC is in RUN mode.
Event ID: 40001: Connection to the configured PLC has been lost during operation.
Inspect PROFIBUS or Ethernet cabling for damage. Verify network topology and termination resistors on PROFIBUS. Restart communication by cycling power to the panel if connection is not re-established automatically.
Event ID: 70010: Project download failed or project data is corrupt on the panel.
Re-transfer the WinCC flexible project to the panel using a valid USB or Ethernet connection. Verify project compatibility with the installed runtime version.
Event ID: 50000: Internal system error or watchdog timeout detected in the HMI runtime.
Perform a controlled restart of the panel. If the error persists, reload the HMI project and check for software conflicts or unsupported script functions.
Event ID: 20000: Operating system or firmware version mismatch detected.
Update the panel firmware using the Siemens ProSave tool to match the version required by the WinCC flexible project. Ensure compatibility between runtime and project versions.
Event ID: 60000: CF card or USB storage device not recognized or read error.
Remove and reinsert the CF card. Verify the card is formatted correctly (FAT32). Replace the CF card if errors persist. Check USB port for physical damage.

Frequently Asked Questions

What PLC systems is the 6AV6446-1BA41-2BB3 compatible with?

The SIMATIC MP 377 is primarily designed for use with Siemens S7-300 and S7-400 PLCs via MPI, PROFIBUS DP, or PROFINET. It also supports communication with third-party controllers through configurable serial and Ethernet interfaces.

What software is required to program this HMI panel?

The MP 377 is programmed using Siemens WinCC flexible 2008 or later. Projects are created on a PC and transferred to the panel via Ethernet, USB, or CF card.

What is the operating voltage of this panel?

The panel operates on 24 V DC. Ensure a stable, regulated 24 V DC power supply is used to prevent operational issues.

Can the CF card slot be used for project storage and data logging?

Yes, the CF card slot supports CompactFlash cards for storing HMI projects, recipe data, and data logs. The card must be formatted in FAT or FAT32 format.

What is the IP protection rating of the front panel?

The front panel of the MP 377 12" Touch carries an IP65 protection rating, making it suitable for installation in environments where dust and water jets may be present.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check for blown internal fuses. Verify the power supply can deliver sufficient current.

Ensure the 24 V DC supply is stable and within tolerance. Replace any blown fuses. If the backlight is faulty, the display panel or inverter board may require replacement.

Touchscreen does not respond or registers incorrect touch positions

Check if the touchscreen is physically damaged or contaminated. Attempt to recalibrate the touchscreen through the panel's Control Panel settings in the operating system.

Clean the touchscreen surface with a soft, dry cloth. Recalibrate using the touchscreen calibration tool in the Siemens panel Control Panel. If calibration fails repeatedly, the touchscreen overlay may need replacement.

HMI panel fails to communicate with the PLC

Verify the communication cable connections at both the panel and PLC ends. Check the configured PLC address, baud rate, and network settings in the WinCC flexible project match the actual PLC configuration.

Replace or reseat communication cables. Correct any address or baud rate mismatches in the project settings. For PROFIBUS, verify bus termination is correctly applied at both ends of the network.

Panel repeatedly reboots or crashes during operation

Check for overheating by verifying ambient temperature is within the 0 to 50 °C operating range. Review system event logs for recurring Event IDs indicating software or hardware faults.

Improve panel ventilation and reduce ambient temperature if overheating is suspected. Reload the HMI project to rule out software corruption. If hardware faults persist, the main board or power supply module may require replacement.

Project download fails when transferring from PC to panel

Verify the Ethernet or USB connection between the PC and panel is active. Confirm the panel is in Transfer mode and that the WinCC flexible version on the PC matches the runtime version installed on the panel.

Switch the panel to Transfer mode via the Control Panel or by pressing the Transfer button at startup. Update the panel firmware using ProSave if there is a version mismatch. Try an alternative transfer medium such as a CF card if network transfer fails.

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