Siemens 6AV6446-7AA40-2BY4 SIMATIC MP 377

Name: Siemens 6AV6446-7AA40-2BY4 SIMATIC MP 377
Brand: Siemens
SKU: 6AV6446-7AA40-2BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-7AA40-2BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-7AA40-2BY4 is a Multi Panel belonging to the SIMATIC MP 377 series, part of Siemens' SIMATIC HMI product line. This unit is a 15-inch touch-screen operator panel designed for demanding industrial visualization and control tasks. It runs on the Windows CE operating system and is engineered for use with Siemens SIMATIC automation systems as well as third-party controllers.

The MP 377 15" Touch features a high-resolution TFT color display with a resolution of 1024 x 768 pixels (XGA) and 64,000 colors, providing clear and detailed process visualization. It is equipped with a 32 MB RAM and 32 MB flash memory configuration, with an optional CompactFlash card slot for extended storage. Communication interfaces include PROFIBUS DP, MPI, Ethernet (RJ45), RS-422/485, and USB ports, enabling flexible integration into various network architectures. The panel supports WinCC flexible runtime software and is compatible with STEP 7 engineering environments.

The SIMATIC MP 377 is widely deployed in manufacturing automation, process control, and machine building applications across industries such as automotive, food and beverage, chemical processing, and water treatment. Its robust construction, wide operating temperature range, and comprehensive communication capabilities make it suitable for installation in control cabinets and operator stations in harsh industrial environments. The large display area and touch interface allow operators to monitor and interact with complex process visualizations effectively.

Technical Specifications

Display Size	15 inch
Display Resolution	1024 x 768 pixels (XGA)
Display Type	TFT color
Display Colors	64,000 colors
Touch Technology	Resistive touch screen
Operating System	Windows CE 5.0
RAM	32 MB
Flash Memory	32 MB
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 40 W
Communication Interface	PROFIBUS DP, MPI, Ethernet (RJ45), RS-422/485, USB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Rating (Front)	IP65
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the configured PLC or controller. Connection to the controller has been lost or cannot be established.
Check the communication cable and connector integrity. Verify the PLC address and communication parameters in WinCC flexible. Ensure the PLC is powered and running.
Event ID: 10001: Tag read error. The HMI panel is unable to read a configured tag from the controller.
Verify the tag address configured in WinCC flexible matches the actual PLC memory address. Check that the PLC program is running and the data block exists.
Event ID: 10002: Tag write error. The HMI panel is unable to write a value to a configured tag in the controller.
Check that the target PLC address is writable and not write-protected. Verify communication link integrity and tag configuration in WinCC flexible.
Event ID: 20000: System memory low. Available RAM on the HMI panel is critically low, which may affect runtime performance.
Reduce the number of active screens or objects. Check for memory leaks in scripts. Consider reducing project complexity or upgrading storage configuration.
Event ID: 40000: Project download error. A project transfer from the engineering PC to the HMI panel has failed.
Verify the transfer connection settings (Ethernet or USB). Ensure the correct IP address is configured. Check that the panel is in transfer mode and that WinCC flexible version is compatible.
Event ID: 50000: Runtime startup error. The WinCC flexible runtime failed to start correctly after power-on.
Perform a controlled restart of the panel. If the error persists, reload the project via transfer. Check for corrupted project files on the flash memory or CompactFlash card.
Event ID: 60000: Screen object configuration error. One or more screen objects reference invalid or missing tags or resources.
Open the project in WinCC flexible and check for compilation errors. Correct any invalid tag references or missing graphic resources, then re-download the project.

Frequently Asked Questions

What is the supply voltage for the Siemens 6AV6446-7AA40-2BY4?

The panel operates on 24 V DC. Ensure a stable, regulated 24 V DC power supply is used to avoid panel malfunctions.

What communication protocols does the MP 377 15" Touch support?

The MP 377 supports PROFIBUS DP, MPI, Industrial Ethernet (via RJ45), RS-422/485 serial communication, and USB. This allows integration with a wide range of Siemens and third-party controllers.

Which engineering software is used to configure the SIMATIC MP 377?

The MP 377 is configured using Siemens WinCC flexible engineering software. It is also compatible with the TIA Portal via migration tools for newer projects.

What is the IP protection rating of the MP 377 15" Touch?

The front of the panel is rated IP65, making it protected against dust ingress and low-pressure water jets, suitable for installation in industrial control cabinets.

Can the MP 377 communicate with non-Siemens PLCs?

Yes, the MP 377 supports communication with third-party controllers via its RS-422/485 serial interface and Ethernet port using standard protocols such as Modbus RTU and Modbus TCP, depending on the driver configuration in WinCC flexible.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel's power connector. Verify the supply is within the specified range and that the power connector is firmly seated. Check if the panel backlight has failed by shining a light on the display to see if a faint image is visible.

If supply voltage is correct and the backlight has failed, the backlight or inverter board requires replacement. If no voltage is present, check the power supply unit and wiring. A full panel repair or replacement may be required if the internal power board is faulty.

Touch screen does not respond or responds inaccurately

Attempt to recalibrate the touch screen via the Windows CE control panel or the SIMATIC HMI panel settings. Check for physical damage, scratches, or contamination on the touch surface.

Perform a touch screen calibration through the panel's Start Center or control panel settings. Clean the touch surface with a soft, dry cloth. If calibration does not resolve the issue, the touch screen overlay may need to be replaced.

Panel fails to establish communication with the PLC

Verify the communication cable type and wiring (MPI/PROFIBUS or Ethernet). Check the configured PLC address and baud rate in the WinCC flexible project settings. Use a bus terminator on PROFIBUS networks if the panel is at the end of the bus segment.

Correct any address or baud rate mismatches in the WinCC flexible project and re-download. Replace the communication cable if damaged. Ensure proper bus termination is applied on PROFIBUS networks.

Project transfer from PC to panel fails

Confirm the transfer connection type (Ethernet or USB) and verify the IP address or COM port settings match between the PC and the panel. Ensure the panel is set to transfer mode via the Start Center.

Set the panel to transfer mode, correct the IP address or connection settings in WinCC flexible, and retry the transfer. If using Ethernet, ensure both devices are on the same subnet. Try a different USB cable or port if using USB transfer.

Panel reboots unexpectedly or freezes during operation

Check the 24 V DC supply for voltage dips or instability using a multimeter or oscilloscope. Review the project for script errors or excessively complex screens that may overload the panel's CPU.

Stabilize the power supply by using a dedicated, adequately rated 24 V DC source with sufficient current capacity. Simplify complex screens or scripts in the WinCC flexible project. If hardware faults are suspected, the panel may require inspection and repair of the internal power or CPU board.

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