Siemens 6AV6446-3AA40-1BY3 SIMATIC MP 370

Name: Siemens 6AV6446-3AA40-1BY3 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-3AA40-1BY3
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-3AA40-1BY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA40-1BY3 is a Multi Panel (MP 370) belonging to the SIMATIC HMI Multi Panel series, manufactured by Siemens. It is a high-performance operator panel designed for demanding machine-level and process visualization tasks. The MP 370 features a 12-inch TFT display and runs on the Windows CE operating system, making it suitable for complex HMI applications.

The 6AV6446-3AA40-1BY3 variant is equipped with a touch-screen interface and offers a display resolution of 800 x 600 pixels (SVGA) with 256-color support. It provides multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling flexible integration into existing automation networks. The panel includes 12 MB of user memory for project data and supports configuration via Siemens WinCC flexible engineering software. It operates on a 24 V DC supply and is built to meet industrial environmental requirements including an IP65 protection rating on the front face.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, and chemical processing industries. It is typically used as a local operator interface on machine control panels, packaging lines, and process control stations where a robust and versatile HMI with network connectivity is required. Its compatibility with SIMATIC S7 PLCs and support for multiple fieldbus protocols makes it a practical choice for integration into Siemens-based automation architectures.

Technical Specifications

Display Size	12 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT color
Display Colors	256 colors
Touch Technology	Resistive touch screen
Operating System	Windows CE
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
User Memory	12 MB
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
IP/Protection Rating	IP65 (front), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Certifications	CE, UL, cULus

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 physical communication cable connections and termination resistors. Verify MPI/PROFIBUS address settings and baud rate configuration in WinCC flexible. Confirm PLC is powered and running.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI panel lost communication with the configured controller.
Inspect the communication cable for damage. Check network topology and bus termination. Restart both the HMI panel and the PLC if the connection is not restored automatically.
Event ID: 20000: Tag read error. A configured tag could not be read from the PLC within the defined timeout period.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check that the PLC program is running and the relevant data areas are accessible.
Event ID: 20001: Tag write error. A value could not be written to the configured PLC tag.
Check that the target PLC address is not write-protected. Verify the data type of the tag in the HMI project matches the PLC variable definition. Confirm communication link is active.
Event ID: 40000: Project download error. Transfer of the WinCC flexible project to the HMI panel failed.
Ensure the transfer cable or Ethernet connection is properly connected. Verify the panel is in Transfer mode. Check that the WinCC flexible project version is compatible with the panel firmware version.
Event ID: 50000: Internal device error or system fault detected on the HMI panel.
Perform a panel restart. If the fault persists, back up the current project and perform a factory reset via the Control Panel. Re-download the project and update firmware if necessary.
Event ID: 60000: Insufficient memory. The HMI panel does not have enough free user memory to load or run the current project.
Reduce the project size by optimizing graphics, removing unused screens, or compressing images. Delete unnecessary files from the panel memory via the Control Panel file manager.

Frequently Asked Questions

What communication interfaces are available on the 6AV6446-3AA40-1BY3?

The MP 370 (6AV6446-3AA40-1BY3) supports MPI, PROFIBUS DP, Ethernet (TCP/IP), and RS-422/485 serial communication interfaces, allowing connection to a wide range of Siemens and third-party controllers.

Which engineering software is used to configure this HMI panel?

The SIMATIC MP 370 is configured using Siemens WinCC flexible software. The project is then transferred to the panel via Ethernet, MPI, or a USB/serial connection.

Is the 6AV6446-3AA40-1BY3 compatible with SIMATIC S7-300 and S7-400 PLCs?

Yes, the MP 370 is fully compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, and can also communicate with S7 controllers over Ethernet using the TCP/IP protocol.

What is the supply voltage requirement for this panel?

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.

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

The front face of the MP 370 carries an IP65 protection rating, 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

Check that 24 V DC is present at the power supply terminals. Measure voltage at the panel connector with a multimeter. Inspect the internal fuse if accessible.

Ensure the power supply is providing stable 24 V DC within the specified tolerance. Replace any blown fuse. If the backlight has failed, the display panel or backlight inverter may require replacement.

Touch screen does not respond or responds inaccurately

Determine whether the issue is a complete lack of response or positional inaccuracy. Test with a stylus to rule out surface contamination. Check if the touch screen calibration has been disrupted.

Perform a touch screen recalibration via the Windows CE Control Panel under the Stylus settings. Clean the screen surface with a soft, dry cloth. If recalibration does not resolve the issue, the touch screen overlay may need replacement.

HMI panel cannot establish communication with the PLC

Verify the communication cable type and wiring. Check the MPI or PROFIBUS address configured on the panel matches the network settings. Use a bus diagnostic tool to check for bus errors or address conflicts.

Correct any address conflicts on the MPI or PROFIBUS network. Ensure bus termination resistors are correctly placed at both ends of the cable. Re-enter the communication parameters in the WinCC flexible project and re-download to the panel.

Project transfer from WinCC flexible fails

Confirm the panel is set to Transfer mode via the Start Center. Check the Ethernet or MPI 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 through the Start Center menu. Disable any PC firewall temporarily during transfer. Ensure the WinCC flexible version used for the project is compatible with the installed panel firmware, and update firmware if necessary.

Panel reboots unexpectedly or freezes during operation

Check the supply voltage for instability or voltage dips under load. Review the system event log on the panel for recorded fault events. Assess whether the issue occurs with specific screen changes or tag updates.

Stabilize the 24 V DC power supply and ensure adequate current capacity. Optimize the WinCC flexible project to reduce CPU load, particularly by limiting the number of active tags and screen update cycles. If the problem persists, perform a firmware update or replace the panel.

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