Siemens 6AV6446-6BA41-0BY4 SIMATIC MP 377

SKU: 6AV6446-6BA41-0BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-6BA41-0BY4 is a Multi Panel belonging to the SIMATIC MP 377 series, part of Siemens' SIMATIC HMI product family. This panel is a high-performance operator interface device designed for demanding industrial visualization and control tasks. It features a 15-inch TFT widescreen display and runs on the Windows CE 6.0 operating system, providing a robust and flexible platform for machine-level HMI applications.

The MP 377 15" Touch panel is equipped with a resistive touchscreen and delivers a display resolution of 1024 x 768 pixels with 64,000 colors. It offers extensive communication capabilities including PROFIBUS DP, PROFINET IO (via Ethernet), MPI, and serial interfaces, enabling seamless integration into a wide range of automation architectures. The unit is powered by a 24 V DC supply and features 12 MB of user memory for project data, along with a CompactFlash card slot and USB ports for data transfer and peripheral connectivity. The robust aluminum die-cast front frame provides IP65 protection on the front panel.

The SIMATIC MP 377 15" Touch is widely deployed in the manufacturing, automotive, food and beverage, chemical, and packaging industries. Its large display area and multi-protocol communication support make it suitable for complex process visualization, recipe management, and data logging on production lines and process plants. The panel's compatibility with Siemens STEP 7 and WinCC flexible engineering software ensures straightforward integration with S7-300 and S7-400 PLC platforms.

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
Operating System	Windows CE 6.0
Input/Operating Voltage	24 V DC (18–30 V DC)
Power Consumption	Approx. 40 W
User Memory	12 MB
Communication Interface	PROFIBUS DP, PROFINET IO (Ethernet), MPI, RS-422/485 serial
USB Ports	2 x USB 2.0
Memory Card Slot	CompactFlash (CF) card slot
IP/Protection Rating	IP65 (front), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10–90% RH (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 1000: System startup error — the HMI runtime failed to initialize correctly during boot.
Perform a full power cycle. If the error persists, reload the HMI project via WinCC flexible or ProSave and check for corrupted project data.
Event ID: 10000: Communication error — connection to the configured PLC (e.g., S7-300/400 via MPI or PROFIBUS) has been lost.
Check physical cable connections, verify bus address settings, and confirm PLC is powered and in RUN mode. Check PROFIBUS/MPI termination resistors.
Event ID: 10001: Communication timeout — the HMI panel did not receive a response from the PLC within the configured timeout period.
Increase the communication timeout parameter in WinCC flexible. Verify network load and cable integrity. Check PLC program cycle time.
Event ID: 20000: Tag read error — a configured tag could not be read from the PLC.
Verify the tag address exists in the PLC and matches the HMI configuration. Check data block availability and PLC access rights.
Event ID: 40000: Project download error — project transfer to the panel was interrupted or failed.
Check the transfer cable or Ethernet connection. Ensure the panel is in Transfer mode and that WinCC flexible version is compatible with the panel firmware.
Event ID: 70010: Internal flash memory error — the panel detected a fault in its internal storage.
Back up the current project, perform a panel reset to factory defaults via the Control Panel, and reload the project. Replace the panel if the error persists.
Event ID: 50000: Recipe data error — recipe records could not be read from or written to the configured storage location.
Check that the CompactFlash card is properly inserted and not write-protected. Verify available storage space and recipe configuration in WinCC flexible.

Frequently Asked Questions

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

The MP 377 is compatible with Siemens S7-300, S7-400, and S7-1200/1500 PLCs via MPI, PROFIBUS DP, or PROFINET IO (Ethernet). It can also communicate with third-party controllers via serial interfaces.

What engineering software is required to program this HMI panel?

The MP 377 is configured using Siemens WinCC flexible 2008 or later. It is also supported within the TIA Portal via WinCC (for migration projects). ProSave is used for firmware updates and backup/restore operations.

What is the operating voltage for the 6AV6446-6BA41-0BY4?

The panel operates on 24 V DC with an allowable input range of 18 V DC to 30 V DC. An appropriate regulated DC power supply must be used.

Does the MP 377 support data logging and recipe management?

Yes, the MP 377 supports data logging, trend displays, alarm logging, and recipe management. Data can be stored on the internal flash memory or on an external CompactFlash card.

What is the front panel protection rating of this unit?

The front panel of the MP 377 15" 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. Check that the voltage is within the 18–30 V DC range. Inspect the internal fuse if accessible.

Correct the supply voltage if out of range. If voltage is correct and display remains blank, the backlight or internal power supply board may have failed — the unit should be sent for repair or the backlight replaced.

Touchscreen does not respond or responds inaccurately

Check whether the touch input is completely unresponsive or just misaligned. Access the touchscreen calibration utility via the Windows CE Control Panel under Start > Settings > Control Panel > TS Calibration.

Recalibrate the touchscreen using the built-in calibration tool. If the touchscreen remains unresponsive after calibration, the resistive touch overlay may be damaged and requires replacement.

Panel fails to communicate with PLC via PROFIBUS

Verify the PROFIBUS cable connections and check that the bus termination resistors are correctly installed at both ends of the bus. Confirm the panel's PROFIBUS address in the Control Panel matches the address configured in WinCC flexible.

Correct any wiring faults, set proper termination, and ensure unique bus addresses. Use a PROFIBUS diagnostic tool to check bus signal quality if communication errors persist.

HMI project cannot be transferred to the panel

Confirm the panel is set to Transfer mode (accessible via the Start Center on the panel). Check the Ethernet or MPI/PROFIBUS connection between the engineering PC and the panel. Verify firewall settings on the PC are not blocking the transfer.

Switch the panel to Transfer mode manually via the Start Center. Disable PC firewall temporarily during transfer. Ensure WinCC flexible version matches the panel's firmware version; update firmware via ProSave if necessary.

Panel reboots repeatedly or freezes during operation

Check the supply voltage for ripple or voltage drops under load. Review the alarm and event logs on the panel for recurring system event codes. Check CompactFlash card integrity if project data is stored externally.

Stabilize the power supply and ensure adequate current capacity. Replace the CompactFlash card if corrupted. Reload the HMI project from a known-good backup. If reboots continue, the panel may require hardware servicing.

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