Siemens 6AV6446-7BA41-3BY4 SIMATIC MP 377

Name: Siemens 6AV6446-7BA41-3BY4 SIMATIC MP 377
Brand: Siemens
SKU: 6AV6446-7BA41-3BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-7BA41-3BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-7BA41-3BY4 is a Multi Panel (MP 377) belonging to the SIMATIC HMI family, designed for demanding visualization and operator control tasks in industrial automation environments. This panel features a 15-inch TFT widescreen display and is part of the SIMATIC MP 377 series, which represents a high-performance tier of Siemens HMI panels intended for complex process visualization. It operates as a standalone operator panel capable of running WinCC flexible runtime applications.

The MP 377 15" Touch variant is equipped with a resistive touchscreen interface and delivers a display resolution of 1024 x 768 pixels with 64,000 colors. It includes an integrated Ethernet (PROFINET) interface as well as MPI/PROFIBUS DP connectivity, enabling seamless integration with SIMATIC S7 PLCs and other automation systems. The panel runs on a Windows CE 5.0 operating system and provides 12 MB of user memory for application data, with support for USB ports for peripherals and data transfer. The unit is powered by 24 V DC and is built to meet industrial environmental requirements including an IP65 front protection rating.

The SIMATIC MP 377 is widely deployed in machine building, process industries, water and wastewater treatment, food and beverage production, and automotive manufacturing. Its large display area and touch operation make it suitable for applications requiring detailed process overviews, trend displays, and alarm management. The panel's compatibility with the SIMATIC S7-300 and S7-400 controller families, as well as third-party systems via OPC, makes it a versatile choice for both OEM machine builders and plant operators.

Technical Specifications

Display Size	15 inch
Display Resolution	1024 x 768 pixels (XGA)
Display Colors	64,000 colors
Display Type	TFT LCD
Touch Technology	Resistive touchscreen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Operating System	Windows CE 5.0
User Memory	12 MB
Communication Interface	Ethernet (PROFINET) RJ45, MPI/PROFIBUS DP (RS-422/RS-485), USB
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	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC or controller. The configured connection cannot be established.
Check physical wiring and cable integrity on MPI/PROFIBUS or Ethernet connection. Verify PLC address settings and communication parameters in WinCC flexible project match the hardware configuration.
Event ID: 10001: Connection to the PLC was established but has been lost during operation.
Inspect network cabling and connectors for intermittent faults. Check PLC CPU status and ensure it is in RUN mode. Verify network load and address conflicts on the bus.
Event ID: 20000: Tag read error. The HMI panel cannot read a configured tag from the PLC.
Verify that the tag address in the WinCC flexible project corresponds to a valid memory location in the PLC. Check PLC program for address changes and update the HMI project accordingly.
Event ID: 20001: Tag write error. The HMI panel cannot write a value to the configured PLC tag.
Confirm the PLC data block or memory area is not write-protected. Check user authorization levels in the HMI project and verify the tag address is correct.
Event ID: 40000: Project loading error. The HMI runtime cannot load the configured project file.
Transfer the project again from the engineering PC using WinCC flexible. Check available user memory on the panel and ensure the project was compiled without errors before transfer.
Event ID: 50000: System memory low warning. Available runtime memory on the panel is critically low.
Reduce the number of simultaneously active screens or reduce the complexity of the project. Archive historical data and clear the data memory if possible.
Event ID: 70000: Backup battery low or missing. The internal buffer battery voltage is below the required threshold.
Replace the internal buffer battery. Refer to the MP 377 operating instructions for the correct battery type and replacement procedure to avoid data loss.
Event ID: 30000: Recipe data error. A recipe record could not be read from or written to the configured storage location.
Check the recipe configuration in WinCC flexible. Verify that the target storage medium (internal memory or USB) is accessible and has sufficient free space.

Frequently Asked Questions

Which Siemens PLCs are compatible with the MP 377 15" Touch panel?

The MP 377 is compatible with SIMATIC S7-300, S7-400, S7-1200, and S7-1500 PLCs via Ethernet/PROFINET, as well as S7-300 and S7-400 via MPI or PROFIBUS DP. Third-party controllers can be integrated via OPC or other supported drivers in WinCC flexible.

What engineering software is required to program the 6AV6446-7BA41-3BY4?

This panel is configured using Siemens WinCC flexible 2008 or later. Projects are compiled on a PC and transferred to the panel via Ethernet, USB, or a memory card.

What is the supply voltage for the MP 377 panel?

The panel requires a 24 V DC power supply. Ensure the power source is capable of supplying sufficient current, typically from a SITOP or equivalent regulated DC power supply.

Can the MP 377 display be operated with gloves?

The MP 377 uses a resistive touchscreen technology, which can generally be operated with thin gloves. However, performance may vary depending on glove material and thickness.

What is the front panel protection rating of the 6AV6446-7BA41-3BY4?

The front of the panel is rated IP65, making it protected against dust ingress and low-pressure water jets. The rear of the enclosure is rated IP20.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the power connector on the rear of the panel using a multimeter. Verify polarity is correct. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is within the specified tolerance. Replace the power supply if voltage is absent or out of range. If voltage is correct and display remains blank, the backlight or internal power board may require replacement.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen via the panel's Control Panel settings accessible during startup. Check for physical damage or contamination on the screen surface.

Perform a touchscreen calibration using the Siemens calibration utility in the Windows CE Control Panel. Clean the screen surface with a soft, dry cloth. If calibration fails repeatedly, the touchscreen overlay may need replacement.

HMI project fails to transfer from engineering PC to the panel

Verify the Ethernet or USB connection between the PC and the panel. Check that the panel is in Transfer mode and that the IP address or communication settings match those configured in WinCC flexible.

Set the panel to Transfer mode via the Start Center or Loader menu. Confirm the PC firewall is not blocking the WinCC flexible transfer. Re-enter the correct panel IP address in the WinCC flexible project transfer settings and retry.

Panel repeatedly reboots or freezes during operation

Check the 24 V DC supply for voltage drops or ripple under load. Review the WinCC flexible project for script errors or memory-intensive operations that may cause runtime instability.

Stabilize the power supply and ensure it meets the panel's current requirements. Simplify or debug scripts in the WinCC flexible project. If the issue persists, perform a factory reset and re-transfer the project.

Communication to PLC is lost intermittently

Inspect the PROFIBUS or Ethernet cable for damage, loose connectors, or excessive cable length. Check for electromagnetic interference sources near the cabling. Verify bus termination resistors are correctly installed on PROFIBUS networks.

Replace damaged cables and secure all connectors. Add or correct bus termination on PROFIBUS. Reduce cable length if it exceeds the specification for the selected baud rate. Shield cables properly and route away from high-voltage conductors.

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