Siemens 6AV6446-3AA41-0BY4 SIMATIC MP 370

Name: Siemens 6AV6446-3AA41-0BY4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-3AA41-0BY4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-3AA41-0BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA41-0BY4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and process visualization applications. This unit features a 12-inch TFT display and is part of the MP 370 series, which represents a high-performance class of Siemens operator panels capable of running WinCC flexible runtime software. It is a panel PC-class device offering robust visualization and operator control functionality in industrial environments.

The MP 370 panel is equipped with a resistive touchscreen and supports multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling integration with a wide range of Siemens SIMATIC S7 PLCs and third-party controllers. The unit runs on Microsoft Windows CE and provides sufficient onboard memory for complex HMI projects with graphics, trends, alarms, and recipes. It supports USB ports for peripheral connectivity and a CompactFlash card slot for project storage and data logging. The panel operates on 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and water treatment facilities. Its combination of a large display, multi-protocol communication, and robust construction makes it suitable for applications requiring detailed process visualization and operator interaction. The panel is particularly common in installations where integration with SIMATIC S7-300 and S7-400 controller families is required.

Technical Specifications

Display Size	12 inch
Display Type	TFT color LCD
Display Resolution	800 x 600 px (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), USB
Operating System	Windows CE
Storage	CompactFlash card slot
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
Series/Product Family	SIMATIC HMI MP 370

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The configured connection cannot be established or has been lost.
Check MPI/PROFIBUS or Ethernet cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both devices if necessary.
Event ID: 10001: Connection to the PLC was interrupted during runtime operation.
Inspect communication cables for damage. Verify PLC is powered and running. Check network topology and bus termination. Re-establish connection via project settings if required.
Event ID: 20000: Project download error. The HMI was unable to receive or store the project transferred from the engineering PC.
Verify sufficient free memory on the CompactFlash card. Check USB or Ethernet connection between engineering PC and panel. Retry the download using WinCC flexible.
Event ID: 40000: System memory low. Available runtime memory is insufficient for current project operations.
Reduce the number of active screens, logged tags, or alarm entries. Optimize the project in WinCC flexible to reduce memory footprint. Consider increasing CompactFlash card capacity.
Event ID: 50000: Operating system error or runtime application crash detected.
Perform a warm restart of the panel. If the issue persists, reload the HMI project via WinCC flexible. In severe cases, perform a factory reset and re-commission the panel.
Event ID: 70000: Configuration error detected. A tag or screen object references an invalid or missing PLC variable.
Open the project in WinCC flexible and check for unresolved tag references. Correct or re-link any invalid tags and re-download the project to the panel.
Event ID: 110000: Date and time synchronization error. The panel clock could not be synchronized with the PLC or network time source.
Check time synchronization settings in the HMI project. Verify the PLC or NTP server is accessible. Manually set the panel date and time via the Control Panel if synchronization is not required.

Frequently Asked Questions

Which PLC families are compatible with the SIMATIC MP 370?

The MP 370 is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP, and also supports Ethernet-based communication with S7 controllers. Third-party PLCs from other manufacturers can be integrated using available communication drivers in WinCC flexible.

What software is used to program and configure the MP 370 panel?

The MP 370 is configured using Siemens WinCC flexible engineering software. Projects are created on a PC and downloaded to the panel via USB, Ethernet, or MPI/PROFIBUS connection.

What is the supply voltage for the 6AV6446-3AA41-0BY4?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is adequately rated for the panel's power consumption of approximately 30 W.

Can the MP 370 panel be used as a standalone PC?

The MP 370 runs Windows CE and is designed primarily as an HMI operator panel rather than a general-purpose PC. It can run WinCC flexible runtime and CE-compatible applications, but it is not intended for standard PC workloads.

What is the front panel protection rating of the MP 370?

The front face of the MP 370 is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for panel-mount installation in industrial enclosures.

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 for any blown internal fuses. Verify the power supply unit can deliver sufficient current.

Ensure the 24 V DC supply is stable and within tolerance. Replace any blown fuses with the correct rating. If the backlight has failed, the display assembly or inverter board may require replacement.

Touchscreen does not respond or responds inaccurately

Check whether the touch input is consistently offset 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 under the touch settings. Clean the screen surface with a soft cloth. If recalibration does not resolve the issue, the resistive touch overlay may need replacement.

HMI cannot communicate with the PLC

Verify the communication cable type and wiring between the panel and PLC. Check that the MPI or PROFIBUS address configured in the HMI project matches the PLC settings. Inspect bus termination at both ends of the network.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download. Ensure bus termination resistors are correctly installed at the physical ends of the network segment.

Panel reboots repeatedly or fails to load the runtime project

Check the CompactFlash card for errors or insufficient free space. Attempt to boot the panel without the project loaded to determine if the issue is hardware or software related.

Reformat or replace the CompactFlash card and re-download the project from WinCC flexible. If the panel still fails to boot correctly, perform a factory reset via the SIMATIC HMI loader menu and recommission the device.

Alarm messages are not displayed or alarm history is missing

Verify that alarm logging is correctly configured in the WinCC flexible project. Check that the CompactFlash card has sufficient free space for alarm log files. Confirm the PLC tags linked to alarm triggers are communicating correctly.

Review alarm configuration in WinCC flexible and ensure all alarm tags are correctly linked and active. Clear old log files from the CompactFlash card to free space. Re-download the project and test alarm triggering from the PLC side.

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