Siemens 6AV6446-3AA40-1AY3 MP370

€ 2.495,00

SKU: 6AV6446-3AA40-1AY3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-3AA40-1AY3 is a Multi Panel MP370 belonging to the SIMATIC HMI Multi Panel family. It is a high-performance operator panel designed for demanding visualization and control tasks in industrial environments. This unit features a 12-inch TFT display and is part of Siemens' established SIMATIC HMI product line, offering robust operator interface functionality for machine and process control.

The MP370 (6AV6446-3AA40-1AY3) is equipped with a 12.1-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation. It runs on WinCC flexible runtime software and provides communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP). The panel features 64 MB of RAM and 20 MB of user memory for project data, and operates on a 24 V DC supply. It supports integration with SIMATIC S7, S5, and third-party controllers via configurable communication drivers.

The MP370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and chemical plant operations. Its combination of a large color display, touch input, and broad controller compatibility makes it suitable for complex HMI applications requiring detailed process visualization, recipe management, and alarm logging. The panel's robust construction and wide operating temperature range make it appropriate for installation in industrial control cabinets and harsh production environments.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
RAM	64 MB
User Memory	20 MB
Communication Interface	MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485
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
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cUL

Common Error Codes and System Events

Event ID: 10000: Communication error between HMI panel and PLC controller. Connection to the configured PLC address cannot be established.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC address settings in WinCC flexible project match the physical PLC configuration.
Event ID: 10001: Connection to PLC lost during runtime operation.
Inspect communication cable integrity and connector seating. Verify PLC is powered and in RUN mode. Check for address conflicts on the bus.
Event ID: 20000: Tag read error. The HMI is unable to read a configured tag from the PLC.
Verify the tag address exists in the PLC program and the data block is not write-protected. Check that the PLC program has not been modified to remove the referenced address.
Event ID: 20001: Tag write error. The HMI cannot write a value to the configured PLC tag.
Check that the target PLC address is not read-only or protected. Verify the PLC is in a state that accepts write operations from the HMI.
Event ID: 40000: Project loading error. The runtime project file is corrupted or incompatible with the installed WinCC flexible runtime version.
Re-transfer the project from the engineering PC using WinCC flexible. Ensure the runtime version on the panel matches the version used to compile the project.
Event ID: 50000: System memory low. Available RAM for runtime operation is critically low.
Reduce the number of simultaneously active screens or reduce the complexity of the project. Restart the panel to clear memory. Consider optimizing the project structure.
Event ID: 60000: Internal hardware fault detected. A hardware component of the panel has reported an error.
Perform a panel restart. If the fault persists, document the event ID and contact Siemens technical support or arrange for panel repair and inspection.
Event ID: 70000: Backup battery low or battery failure. The internal buffer battery for retaining data and real-time clock is discharged.
Replace the internal buffer battery with the correct Siemens-specified replacement. Refer to the MP370 operating instructions for battery replacement procedure.

Frequently Asked Questions

What operating voltage does the MP370 6AV6446-3AA40-1AY3 require?

The panel operates on 24 V DC. Ensure the power supply is within the specified tolerance range and adequately rated for the panel's power consumption.

Which communication protocols does the MP370 support?

The MP370 supports MPI, PROFIBUS DP, Ethernet TCP/IP, and RS-422/485 serial communication. This allows connectivity to SIMATIC S7 PLCs, S5 PLCs, and a range of third-party controllers.

What software is required to configure and program the MP370?

The MP370 is configured using Siemens WinCC flexible engineering software. The compiled project is then transferred to the panel via Ethernet, MPI, or a USB/memory card depending on the available interfaces.

Is the MP370 compatible with SIMATIC S7-300 and S7-400 PLCs?

Yes, the MP370 is fully compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. Ethernet-based communication to S7 controllers is also supported using the appropriate communication drivers.

What is the front panel protection rating of the MP370?

The front panel of the MP370 is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for installation in industrial control panels.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the voltage is within the specified tolerance. Inspect the internal fuse if accessible.

Correct any power supply issues and ensure stable 24 V DC is delivered to the panel. If the supply is confirmed correct and the display remains blank, the internal power supply board or backlight inverter may require replacement.

Touch screen does not respond or responds inaccurately

Check whether the touch screen responds at all or only in certain areas. Determine if the issue is a calibration problem or a hardware fault by attempting touch screen recalibration from the panel's system settings.

Perform a touch screen recalibration via the Control Panel in the panel's Start Center. If calibration does not resolve the issue, the touch screen overlay may be damaged and require replacement.

Panel cannot establish communication with the PLC

Verify the MPI or PROFIBUS address configured in the WinCC flexible project matches the physical PLC address. Check cable connections, bus termination, and that no address conflicts exist on the network.

Correct any address mismatches in the project configuration and re-transfer the project to the panel. Replace or reseat communication cables and verify bus termination resistors are correctly installed at both ends of the bus.

Panel repeatedly restarts or crashes during runtime

Check for system event logs in the panel's Audit Trail or event buffer. Determine whether the restarts coincide with specific screen changes or communication events, which may indicate a project or memory issue.

Optimize the WinCC flexible project to reduce memory usage. Re-transfer a freshly compiled project to the panel. If the problem persists, perform a factory reset and re-commission the panel, or inspect the hardware for internal faults.

Real-time clock loses time after power off

The real-time clock is maintained by an internal buffer battery. If the clock resets to a default time after each power cycle, the buffer battery is likely discharged.

Replace the internal buffer battery with the Siemens-specified replacement type. Follow the battery replacement procedure in the MP370 operating instructions and reset the clock after replacement.

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