Siemens 6AV6446-3AA40-1BY4 SIMATIC MP 370

Name: Siemens 6AV6446-3AA40-1BY4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-3AA40-1BY4
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-3AA40-1BY4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA40-1BY4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and process visualization tasks. This panel operates as a high-performance operator interface unit capable of running WinCC flexible runtime software, providing a robust platform for complex HMI applications. It is part of Siemens' established SIMATIC HMI panel range, which is widely deployed across industrial automation environments.

The MP 370 features a 12-inch TFT display with a resolution of 800 x 600 pixels (SVGA) and supports 256 colors, offering clear visualization of process data and graphics. The unit is equipped with a resistive touch screen as well as function keys, providing flexible operator input options. It 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 panel includes a CompactFlash card slot for project storage and data logging, and runs on a 24 V DC supply.

The SIMATIC MP 370 is commonly used in machine building, automotive manufacturing, food and beverage processing, and chemical plant environments where a reliable and feature-rich HMI solution is required at the machine or cell level. Its combination of touch and key-based input, broad communication support, and compatibility with WinCC flexible makes it well suited for applications requiring detailed process visualization, recipe management, alarm logging, and trend display. The panel's robust construction and wide operating temperature range make it appropriate for installation in industrial control cabinets.

Technical Specifications

Display Size	12 inch
Display Type	TFT LCD
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input Voltage	24 V DC
Voltage Range	19.2 V DC to 28.8 V DC
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
Storage	CompactFlash card slot
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Rating (Front)	IP65
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI Multi Panel MP 370
Certifications	CE, UL, cULus

Common Error Codes and 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 MPI/PROFIBUS or Ethernet cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both the panel and PLC if necessary.
Event ID: 10001: Connection to the PLC was interrupted during runtime operation.
Inspect communication cables for damage or loose connectors. Verify network topology and bus termination. Check PLC operational state and re-establish the connection.
Event ID: 20000: Tag read error. The HMI panel cannot read the value of a configured tag from the controller.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for correct data availability.
Event ID: 20001: Tag write error. A write operation to a PLC tag has failed.
Check that the target PLC address is not write-protected. Verify communication link integrity and confirm the tag address configuration in the HMI project.
Event ID: 40000: Project loading error. The HMI runtime was unable to load the project file from the storage medium.
Check the CompactFlash card for correct insertion and integrity. Re-transfer the project from the engineering PC using WinCC flexible. Replace the CompactFlash card if it is faulty.
Event ID: 50000: System memory low. Available runtime memory is insufficient for the current project.
Reduce the complexity of the project, decrease the number of simultaneous active screens or logged tags. Ensure no unnecessary background processes are running.
Event ID: 70000: Operating system error or runtime software fault detected on the panel.
Perform a panel restart. If the fault persists, re-image the panel operating system using the Siemens ProSave tool and re-transfer the WinCC flexible project.
Event ID: 110000: Recipe data error. A recipe record could not be read from or written to the storage medium.
Check the CompactFlash card for available storage space and integrity. Verify recipe configuration in the WinCC flexible project and re-transfer if necessary.

Frequently Asked Questions

Which PLC families are compatible with the SIMATIC MP 370?

The MP 370 is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces, and with S7-300/400 via Ethernet. It also supports communication with third-party controllers through configurable drivers in WinCC flexible.

What software is used to create and transfer projects to the MP 370?

Projects for the MP 370 are created using Siemens WinCC flexible engineering software and transferred to the panel via Ethernet, MPI, or USB connection using the ProSave utility or directly from within WinCC flexible.

Does the 6AV6446-3AA40-1BY4 support both touch and key-based input?

Yes, the MP 370 12-inch variant features both a resistive touchscreen and dedicated function keys, allowing flexible operator interaction suited to different application requirements.

What is the supply voltage for the MP 370?

The panel requires a 24 V DC supply with an operating range of 19.2 V DC to 28.8 V DC.

Can the MP 370 be used for data logging and alarm archiving?

Yes, the MP 370 supports data logging, alarm logging, and trend display functions within WinCC flexible runtime, with data stored on the CompactFlash card.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector to confirm it is within the 19.2 V to 28.8 V range. Check the internal fuse and inspect the power supply cable for damage.

Correct any supply voltage issues at the source. Replace the internal fuse if blown. If the supply is correct and the display remains blank, the backlight or internal power board may require replacement or professional repair.

HMI panel fails to communicate with the PLC

Verify the MPI or PROFIBUS address configured in the WinCC flexible project matches the physical PLC address. Inspect the communication cable for continuity and check bus termination at both ends of the network.

Correct address mismatches in the project and re-transfer to the panel. Replace damaged cables and ensure proper bus termination resistors are fitted. Confirm the PLC is in RUN mode and the network is correctly configured.

Touchscreen input is inaccurate or unresponsive

Check whether the touchscreen calibration has drifted. Access the panel's Control Panel via the Start menu in the operating system and navigate to the touchscreen calibration utility.

Recalibrate the touchscreen using the built-in calibration tool. If the touchscreen remains unresponsive after calibration, inspect the touch controller hardware and consider replacing the touch overlay or the panel.

Project cannot be transferred from the engineering PC to the panel

Verify the communication interface settings in WinCC flexible match the physical connection being used (Ethernet IP address, MPI address, or USB). Check that the panel is in transfer mode and not running the runtime application.

Set the panel to transfer mode via the Control Panel loader screen. Confirm network or MPI settings are consistent between the PC and panel. Disable any PC firewall rules blocking the WinCC flexible transfer port if using Ethernet.

Panel repeatedly restarts or displays a runtime crash

Check the CompactFlash card for errors and verify the project file integrity. Determine whether the issue occurs with a specific screen or function, which may indicate a corrupted project element.

Re-transfer the WinCC flexible project to the panel after validating it in the engineering software. If the problem persists, use the Siemens ProSave tool to restore the panel operating system image, then re-transfer the project.

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