Siemens 6AV6446-6CA41-0BY5 SIMATIC MP 377

SKU: 6AV6446-6CA41-0BY5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-6CA41-0BY5 is a Multi Panel belonging to the SIMATIC MP 377 series, part of Siemens' SIMATIC HMI product line. 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 operating system, making it suitable for complex SCADA and HMI applications.

The MP 377 15" Touch panel is equipped with a resistive touchscreen and delivers a display resolution of 1024 x 768 pixels (XGA) with 64,000 colors. It features an Intel PXA270 processor running at 400 MHz and provides 64 MB RAM along with 64 MB flash memory for application storage. Communication interfaces include PROFIBUS DP, PROFINET (Ethernet), USB, and a serial MPI/DP interface, enabling seamless integration into Siemens S7 PLC environments. The unit operates on a 24 V DC supply and supports configuration via WinCC flexible or TIA Portal.

The SIMATIC MP 377 is widely deployed in manufacturing, process automation, energy management, and machine tool industries where a large, high-resolution operator panel is required. Its robust industrial design, broad communication capability, and compatibility with the Siemens SIMATIC controller family make it a reliable choice for complex visualization tasks on production lines, packaging machinery, and process control systems.

Technical Specifications

Display Size	15 inch
Display Resolution	1024 x 768 pixels (XGA)
Display Colors	64,000 colors
Display Type	TFT
Touch Technology	Resistive touchscreen
Processor	Intel PXA270, 400 MHz
RAM	64 MB
Flash Memory	64 MB
Operating System	Windows CE 5.0
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 40 W
Communication Interface	PROFIBUS DP, PROFINET (Ethernet RJ45), MPI, USB, RS-422/RS-485
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
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 lost.
Check PROFIBUS/MPI/PROFINET cable connections and termination resistors. Verify PLC address settings match HMI project configuration. Restart both devices if necessary.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI panel lost communication with the configured controller.
Inspect network cabling and connectors. Confirm PLC is in RUN mode. Check for address conflicts on the PROFIBUS or Ethernet network.
Event ID: 20000: Tag read error. The HMI panel cannot read a configured tag from the PLC.
Verify the tag address in the HMI project matches the actual PLC data block or memory address. Check PLC program for deleted or renamed variables.
Event ID: 40000: Project download error. Transfer of the HMI project from the engineering PC to the panel failed.
Ensure the correct transfer channel is selected (Ethernet or USB). Check firewall settings on the engineering PC. Verify the panel is in Transfer mode before initiating download.
Event ID: 50000: Internal system error on the HMI panel. An unexpected software fault has occurred in the runtime environment.
Restart the HMI panel. If the error persists, reload the HMI project. Consider restoring the panel to factory settings and re-downloading the project.
Event ID: 70000: Flash memory write error. The panel was unable to write data to internal flash storage, possibly due to a full or corrupted memory.
Check available flash memory capacity. Delete unnecessary files or recipe data. If corruption is suspected, perform a factory reset and re-download the project.
Event ID: 30000: Script or function error in the HMI project. A configured script or function block has encountered a runtime error.
Review the script logic in WinCC flexible or TIA Portal. Check for division by zero, invalid tag references, or unsupported functions. Correct the script and re-download the project.

Frequently Asked Questions

What PLC systems is the SIMATIC MP 377 compatible with?

The MP 377 is primarily designed for use with Siemens SIMATIC S7-300, S7-400, and S7-1500 PLCs via MPI, PROFIBUS DP, or PROFINET interfaces. It can also communicate with third-party controllers via serial interfaces using appropriate drivers in WinCC flexible.

What engineering software is required to configure the MP 377?

The MP 377 is configured using Siemens WinCC flexible 2008 or later. It is also supported in the TIA Portal with WinCC (TIA Portal) for integration into modern Siemens engineering workflows.

What is the supply voltage for the 6AV6446-6CA41-0BY5?

The panel requires a 24 V DC power supply. It is recommended to use a regulated SELV power supply with sufficient current capacity, typically at least 2 A.

Can the MP 377 be used for SCADA applications?

Yes, the MP 377 running Windows CE supports WinCC flexible Runtime, which allows for advanced visualization, alarm management, recipe handling, and data logging suitable for SCADA-level applications on the panel itself.

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

The front panel of the MP 377 achieves IP65 protection, making it resistant to dust ingress and low-pressure water jets, suitable for installation in industrial control cabinet doors.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check that the supply voltage is within the specified range and that the connector is fully seated.

Replace the power supply or correct wiring if voltage is absent. If voltage is present but display remains blank, the internal backlight or power supply board may be faulty and the panel should be sent for repair.

Touchscreen does not respond or responds inaccurately

Check whether the touch input is consistently offset or completely unresponsive. Determine if the issue appeared after a project download or physical impact.

Perform a touchscreen recalibration via the Windows CE Control Panel or the SIMATIC HMI panel settings. If recalibration does not resolve the issue, the resistive touch overlay may be damaged and requires replacement.

HMI panel fails to establish communication with the PLC

Verify the physical connection (PROFIBUS cable, Ethernet cable, or MPI cable). Check the bus address and baud rate settings on both the HMI and PLC. Use a bus diagnostic tool to check for network errors.

Correct any address conflicts or baud rate mismatches. Ensure PROFIBUS termination resistors are correctly placed at both ends of the bus. Re-download the HMI project if configuration changes were made.

Panel repeatedly restarts or crashes during runtime

Check the operating temperature of the installation environment. Review the system event log in WinCC flexible Runtime for recurring error event IDs. Check flash memory utilization.

Ensure adequate ventilation around the panel and that ambient temperature does not exceed 50 °C. Free up flash memory if it is near capacity. If the issue persists, perform a factory reset and re-download the project.

Project download fails from engineering PC to panel

Confirm the panel is set to Transfer mode. Verify the IP address or PROFIBUS address of the panel matches the settings in the WinCC flexible project. Check for firewall or antivirus software blocking the transfer on the PC.

Disable firewall or configure exceptions for WinCC flexible transfer ports. Ensure the correct network adapter is selected in the transfer settings. Try using a direct USB connection as an alternative transfer method.

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