Siemens 6AV6446-1BA41-2BA4 SIMATIC MP 370

Name: Siemens 6AV6446-1BA41-2BA4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1BA41-2BA4
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6446-1BA41-2BA4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1BA41-2BA4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level visualization and operator control tasks. This unit features a 12-inch TFT display and is part of Siemens' high-performance panel range, offering robust local HMI functionality for industrial automation environments. The MP 370 series sits above the OP/TP 270 range and is intended for applications requiring larger display areas and expanded communication capabilities.

The MP 370 12" Touch variant (6AV6446-1BA41-2BA4) is equipped with a color TFT touchscreen display with a resolution of 800 x 600 pixels (SVGA) and supports 256 colors. It provides multiple communication interfaces including MPI, PROFIBUS DP, and an Ethernet interface, enabling integration with SIMATIC S7 PLCs and other controllers. The panel runs on WinCC flexible runtime software and offers substantial project memory for storing screens, tags, and scripts. Operating voltage is 24 V DC, and the unit is built to IEC 61131 standards with an IP65 front panel protection rating.

The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and general factory automation. Its large touchscreen interface makes it suitable for complex process visualization, recipe management, alarm logging, and trend display applications. The panel's multi-protocol communication support allows it to serve as a central HMI node in mixed-controller environments, making it a versatile choice for both OEM machine builders and end-user plant installations.

Technical Specifications

Display Size	12 inch
Display Type	TFT Color LCD
Display Resolution	800 x 600 pixels (SVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (10/100 Mbit/s), RS-422/485
IP/Protection Rating	IP65 (front panel)
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, cUL
Series/Product Family	SIMATIC MP 370

Common Error Codes & System Events

Event ID: 10000: Configuration error detected during startup; project data may be corrupt or incompatible with the panel firmware version.
Re-transfer the WinCC flexible project to the panel using the correct firmware version. Verify project compatibility settings in WinCC flexible.
Event ID: 10001: Communication connection to the configured PLC could not be established.
Check MPI/PROFIBUS DP or Ethernet cabling and termination. Verify PLC address settings match those configured in the HMI project.
Event ID: 10002: Tag read/write error; the HMI cannot access one or more configured PLC tags.
Verify PLC is in RUN mode and that the tag addresses in the HMI project match the actual PLC data block structure.
Event ID: 10003: Alarm buffer overflow; the number of pending alarms exceeds the buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration to reduce simultaneous alarm occurrences or increase buffer size in project settings.
Event ID: 10004: Recipe data transfer error; recipe records could not be read from or written to the PLC.
Check PLC data block addresses assigned to recipe tags. Ensure the PLC program is not write-protecting the relevant data blocks during transfer.
Event ID: 10005: Internal panel memory error or project memory insufficient for the loaded project.
Delete unused projects and data from panel memory. If error persists, perform a factory reset and re-transfer the project.
Event ID: 10006: Firmware update failed or firmware version mismatch detected.
Re-flash the panel firmware using ProSave or WinCC flexible, ensuring the firmware version matches the project requirements.
Event ID: 10007: Touchscreen calibration error; touch input is not responding accurately.
Perform touchscreen recalibration via the panel's Start Center or Control Panel settings. If calibration fails repeatedly, inspect the touchscreen hardware for damage.

Frequently Asked Questions

What communication interfaces are available on the 6AV6446-1BA41-2BA4?

The MP 370 12" Touch provides MPI, PROFIBUS DP (up to 12 Mbit/s), Ethernet (10/100 Mbit/s), and RS-422/485 serial interfaces. This allows direct connection to SIMATIC S7-300/400 PLCs and third-party controllers.

Which software is used to configure and program this panel?

The 6AV6446-1BA41-2BA4 is configured using Siemens WinCC flexible engineering software. Projects are transferred to the panel via Ethernet, MPI, or USB using the ProSave utility.

What is the operating voltage for this HMI panel?

The panel operates on 24 V DC. Ensure a stable, regulated 24 V DC power supply with sufficient current capacity (typically 2 A or more) is used.

Is the front panel of the MP 370 rated for wash-down or dusty environments?

Yes, the front panel carries an IP65 protection rating, making it suitable for environments with dust and water spray. The rear of the unit is not IP65 rated and must be installed in a suitable enclosure.

Can the MP 370 communicate with non-Siemens PLCs?

Yes, via the RS-422/485 serial interface and Ethernet port, the MP 370 supports communication with various third-party controllers using protocols such as Modbus RTU and other serial drivers available in WinCC flexible.

Troubleshooting

Display remains blank after power is applied

Measure 24 V DC at the power supply connector on the rear of the panel. Check the internal fuse if accessible. Observe whether the backlight illuminates briefly at startup.

Verify the 24 V DC supply is within tolerance (20.4–28.8 V DC). Replace the power supply if voltage is absent. If the backlight fails immediately, the CCFL backlight or inverter board may require replacement.

Touchscreen does not respond or responds inaccurately

Attempt touchscreen recalibration from the Start Center. Check for physical damage, scratches, or contamination on the touch surface. Verify that no objects are pressing against the screen bezel.

Recalibrate the touchscreen via the Control Panel in the Start Center. Clean the screen surface with a soft cloth. If calibration cannot be completed, the touchscreen overlay may need to be replaced.

HMI cannot establish communication with the S7 PLC

Check MPI or PROFIBUS DP cable connections and bus termination resistors at both ends. Verify the PLC station address and baud rate settings match those configured in the HMI project.

Correct any address or baud rate mismatches in the WinCC flexible project. Replace or re-terminate the communication cable. Test the bus with a PROFIBUS diagnostic tool if the issue persists.

Panel repeatedly reboots or freezes during operation

Check the 24 V DC supply for voltage dips or ripple under load. Review the event log in the Start Center for system error entries. Inspect the ambient temperature around the panel installation.

Stabilize the power supply and ensure adequate ventilation around the panel. If a specific project event triggers the reboot, review and correct the associated script or alarm configuration in WinCC flexible.

Project transfer fails when downloading from WinCC flexible

Verify the communication path (Ethernet IP address or MPI address) is correctly configured in WinCC flexible transfer settings. Check that the panel is in Transfer mode via the Start Center.

Set the panel to Transfer mode manually from the Start Center. Confirm the PC and panel are on the same network subnet for Ethernet transfers. Try an alternative transfer method (e.g., switch from Ethernet to MPI) to isolate the issue.

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