Siemens 6AV6446-7AA41-2BY3 MP 377

€ 1.995,00

SKU: 6AV6446-7AA41-2BY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-7AA41-2BY3 is a Multi Panel (MP 377) belonging to the SIMATIC HMI Multi Panel series by Siemens. This panel is a high-performance operator interface device designed for demanding industrial visualization and control tasks, featuring a 12-inch widescreen TFT display. It is part of the SIMATIC HMI product line, which provides scalable and flexible human-machine interface solutions for a wide range of automation environments.

The MP 377 (6AV6446-7AA41-2BY3) is equipped with a resistive touch screen and an integrated keyboard, offering flexible operator input options. It runs on Microsoft Windows CE and supports communication via PROFIBUS DP, MPI, and Ethernet (PROFINET), enabling integration with SIMATIC S7 PLCs and third-party controllers. The panel features 12 MB of user memory for project data, a CompactFlash card slot for additional storage, and a USB interface for peripheral connectivity. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The SIMATIC MP 377 is widely used in machine building, automotive manufacturing, process industries, and factory automation where a robust and versatile HMI terminal is required. Its combination of touch and key operation makes it suitable for environments where operators need reliable input methods under varying conditions. The panel's broad communication capabilities and compatibility with the SIMATIC software ecosystem make it a practical choice for complex visualization tasks in both discrete and process automation applications.

Technical Specifications

Display Size	12 inch
Display Type	TFT widescreen
Display Resolution	800 x 480 px
Display Colors	65,536 colors
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
Communication Interface	PROFIBUS DP, MPI, Ethernet (PROFINET), USB
User Memory	12 MB
Operating System	Windows CE
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
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 interrupted.
Check PROFIBUS/MPI/Ethernet cabling and connector integrity. Verify PLC address settings match the HMI project configuration. Check that the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during runtime. The HMI panel lost communication with the configured controller.
Inspect network cables and connectors. Verify PLC is powered and operational. Check for address conflicts on the network. Restart both PLC and HMI if necessary.
Event ID: 20000: Project download error. The project could not be transferred to the HMI panel successfully.
Verify the transfer cable or network connection between the engineering PC and the HMI. Ensure the correct transfer settings are configured in WinCC flexible. Retry the download.
Event ID: 40000: System memory low. Available memory for the HMI runtime project is insufficient.
Reduce the size of the HMI project by removing unused screens, tags, or graphics. Use a CompactFlash card for extended storage. Restart the panel after optimization.
Event ID: 50000: Internal device error or hardware fault detected on the HMI panel.
Perform a panel restart. If the error persists, back up the project and perform a factory reset. Contact Siemens technical support if the fault recurs after reset.
Event ID: 60000: Tag update error. One or more configured tags could not be read from or written to the PLC.
Check that the tag addresses in the HMI project match the actual PLC data block or memory addresses. Verify PLC program is running and the relevant data areas are accessible.
Event ID: 70000: Recipe data error. A recipe transfer to or from the PLC or storage medium failed.
Check the recipe configuration in WinCC flexible. Ensure the CompactFlash card is properly inserted and not write-protected. Verify sufficient storage space is available.

Frequently Asked Questions

What communication interfaces does the MP 377 (6AV6446-7AA41-2BY3) support?

The MP 377 supports PROFIBUS DP, MPI, and Ethernet (PROFINET) for PLC communication, as well as USB ports for peripheral devices such as keyboards, mice, and memory sticks.

Which PLCs are compatible with the Siemens MP 377?

The MP 377 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, and S7-300/400/1200/1500 via PROFINET/Ethernet. It also supports third-party controllers through OPC or other communication drivers configured in WinCC flexible.

What software is used to program and configure the MP 377?

The MP 377 is configured using Siemens WinCC flexible 2008 or later. Projects are created on an engineering PC and transferred to the panel via Ethernet, USB, or a serial connection.

What is the front panel protection rating of the MP 377?

The front face of the MP 377 is rated IP65, providing full protection against dust ingress and protection against low-pressure water jets, making it suitable for installation in industrial control panels.

Can the MP 377 use external storage for project data?

Yes, the MP 377 includes a CompactFlash card slot that can be used for extended project storage, recipe data, data logs, and backup of the HMI project.

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 that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Ensure the power supply provides a stable 24 V DC within the rated current capacity. Replace the power supply unit if voltage is absent or out of tolerance. If voltage is correct and display remains blank, the backlight or internal power board may require replacement.

Touchscreen does not respond or responds inaccurately

Check whether the touch input is consistently off-target or completely unresponsive. Determine if the issue is present across the entire screen or only in specific zones.

Perform a touchscreen recalibration via the Windows CE Control Panel or the SIMATIC HMI startup menu. Clean the screen surface with a soft cloth. If recalibration does not resolve the issue, the resistive touch overlay may be damaged and require replacement.

HMI cannot establish communication with the PLC

Verify the communication cable connections at both the HMI and PLC ends. Check the configured PLC address and communication parameters in the WinCC flexible project against the actual PLC settings.

Correct any address mismatches in the HMI project and re-download. Replace faulty cables or connectors. Ensure the PLC is in RUN mode and the network is free of address conflicts. Test with a known-good cable if available.

Panel freezes or restarts unexpectedly during operation

Check the supply voltage for instability or voltage dips under load. Review the HMI project for excessive tag polling rates or memory-intensive screen configurations.

Stabilize the power supply and ensure adequate current capacity. Optimize the HMI project by reducing polling rates and screen complexity. Update the panel firmware to the latest version available from Siemens. If the issue persists, perform a factory reset and reload the project.

Project transfer from engineering PC fails

Verify the transfer connection type (Ethernet or USB) and confirm the panel is in Transfer mode. Check firewall settings on the engineering PC that may block the transfer.

Set the panel to Transfer mode via the Start Center menu. Ensure the correct IP address or COM port is configured in WinCC flexible transfer settings. Disable PC firewall temporarily to test. Use a direct Ethernet cable connection rather than a network switch if issues persist.

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