Siemens 6AV6446-7AA40-3BY4 SIMATIC MP 377

Name: Siemens 6AV6446-7AA40-3BY4 SIMATIC MP 377
Brand: Siemens
SKU: 6AV6446-7AA40-3BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-7AA40-3BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-7AA40-3BY4 is a Multi Panel belonging to the SIMATIC MP 377 series, part of Siemens' SIMATIC HMI product family. This high-performance operator panel is designed for demanding visualization and control tasks in industrial automation environments. It features a 15-inch TFT display and runs on the Windows CE operating system, providing a robust and flexible platform for machine-level HMI applications.

The MP 377 panel is equipped with a resistive touchscreen and an integrated keyboard interface, offering flexible operator interaction. It supports multiple communication interfaces including PROFIBUS DP and Ethernet (PROFINET), enabling seamless integration into modern automation architectures. The panel features 12 MB user memory for project data, a CompactFlash card slot for data storage and project transfer, and a USB interface for peripheral connectivity. The unit operates on 24 V DC supply voltage and is built to meet the demands of continuous industrial operation.

The SIMATIC MP 377 is widely deployed in manufacturing, automotive, food and beverage, and process industries where a large-format, high-resolution display is required for complex machine visualization. Its compatibility with Siemens SIMATIC S7 PLCs and WinCC flexible engineering software makes it a standard choice for system integrators building scalable HMI solutions. The panel's robust construction and wide operating temperature range make it suitable for installation in control cabinets and harsh industrial environments.

Technical Specifications

Display Size	15 inch
Display Type	TFT color
Display Resolution	1024 x 768 px (XGA)
Display Colors	64,000 colors
Touch Technology	Resistive touchscreen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 60 W
Communication Interface	PROFIBUS DP, Ethernet (PROFINET), RS-422/RS-485, USB
Memory	12 MB user memory
Storage Expansion	CompactFlash card slot
Operating System	Windows CE 5.0
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP/Protection Rating	IP65 (front), IP20 (rear)
Certifications	CE, UL, cULus
Mounting	Panel mounting

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 or Ethernet cable connections and termination resistors. Verify PLC is powered and running. Confirm communication parameters (address, baud rate) match on both devices.
Event ID: 10001: Connection to PLC timed out. The HMI did not receive a response from the controller within the configured timeout period.
Check network cabling and connectors. Verify PLC program is running and the communication driver is correctly configured. Increase timeout value in WinCC flexible project settings if necessary.
Event ID: 20000: Project download error. Transfer of the HMI project from the engineering PC to the panel failed.
Ensure the panel is in transfer mode. Check USB or Ethernet connection between engineering PC and panel. Verify WinCC flexible version compatibility with the panel firmware version.
Event ID: 40000: System memory low. Available user memory on the panel is insufficient for the current project or runtime operation.
Reduce project size by optimizing graphics and scripts. Delete unused data logs or alarm archives. Consider using a CompactFlash card for extended storage.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or the firmware file is incompatible with the panel hardware.
Restart the panel and retry the firmware update using the correct firmware version for the 6AV6446-7AA40-3BY4. Use a formatted CompactFlash card with the correct firmware image.
Event ID: 60000: Tag read/write error. The HMI runtime could not read from or write to a configured PLC tag.
Verify the tag address is correct in the WinCC flexible project. Confirm the PLC data block or memory area exists and is accessible. Check for PLC program changes that may have altered the data structure.
Event ID: 70000: Screen saver or backlight timeout activated. Display has dimmed or turned off due to inactivity.
Touch the screen or press a key to reactivate the display. Adjust the screen saver timeout settings in the panel's system settings if the default interval is not suitable.

Frequently Asked Questions

What engineering software is required to configure the SIMATIC MP 377?

The MP 377 is configured using Siemens WinCC flexible 2008 or later. Projects are compiled and downloaded to the panel via USB, Ethernet, or CompactFlash card.

Which Siemens PLCs are compatible with the MP 377?

The MP 377 is compatible with SIMATIC S7-200, S7-300, S7-400, and S7-1200 series PLCs via PROFIBUS DP or Ethernet/PROFINET connections. Third-party controllers can also be connected via supported communication drivers.

What is the supply voltage for the 6AV6446-7AA40-3BY4?

The panel requires a 24 V DC power supply. The input voltage tolerance is typically 18 V DC to 30 V DC.

Does the MP 377 support remote access or VNC?

Yes, the SIMATIC MP 377 supports VNC (Virtual Network Computing), allowing remote monitoring and operation of the HMI screen over an Ethernet network.

Can the CompactFlash card be used for project backup?

Yes, the CompactFlash card slot can be used to store and transfer HMI projects, data logs, alarm archives, and firmware updates, as well as for project backup purposes.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals. Measure voltage at the panel connector. Inspect the internal fuse if accessible. Verify the backlight is not simply dimmed due to screen saver activation.

Restore correct 24 V DC supply voltage within the 18–30 V DC tolerance range. If the backlight has failed, the display assembly or backlight inverter may require replacement. Touch the screen to rule out screen saver activation.

HMI panel fails to communicate with S7 PLC via PROFIBUS

Check PROFIBUS cable connections, termination resistors at both ends of the bus, and the PROFIBUS address configured on both the panel and PLC. Use a PROFIBUS diagnostic tool to check bus integrity.

Correct any address conflicts, ensure termination resistors are installed only at the physical ends of the PROFIBUS segment, and replace damaged cables or connectors. Verify baud rate settings match on all devices on the bus.

Touchscreen does not respond or registers incorrect touch positions

The resistive touchscreen may require recalibration. Check for physical damage to the screen surface or contamination affecting touch sensitivity.

Access the panel's system settings and run the touchscreen calibration routine. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touchscreen overlay may need replacement.

Project download from WinCC flexible fails

Verify the panel is set to transfer mode (accessible via the Start Center on the panel). Check the USB or Ethernet connection between the engineering PC and the panel. Confirm the WinCC flexible project version is compatible with the panel firmware.

Set the panel to transfer mode before initiating download. Update panel firmware if there is a version mismatch. Use a direct USB connection to rule out network issues, or transfer the project via CompactFlash card.

Panel reboots unexpectedly during operation

Unexpected reboots can be caused by power supply instability, overheating, or corrupted project data. Check supply voltage stability and ambient temperature around the panel.

Ensure the 24 V DC supply is stable and free from voltage spikes. Verify the panel's operating environment does not exceed 50 °C. Reload the HMI project from a known good backup. If reboots persist, the panel may require hardware inspection or repair.

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