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

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

Description
Additional information

The Siemens 6AV6446-1BA41-1BA4 is a Multi Panel (MP 370) belonging to the SIMATIC HMI family, designed for demanding machine-level and plant-level visualization tasks. This panel features a 12-inch display and is part of Siemens' high-performance operator panel series, offering robust human-machine interface capabilities for industrial automation environments. It is engineered to integrate seamlessly with Siemens SIMATIC S7 controllers and other automation systems.

The MP 370 features a 12.1-inch TFT color display with a resolution of 800 x 600 pixels (SVGA), supporting up to 256 colors for clear process visualization. It is equipped with a touch screen interface and includes MPI/PROFIBUS DP communication interfaces for direct connection to SIMATIC PLCs, as well as an Ethernet interface for network connectivity. The panel runs on Windows CE and supports configuration via Siemens WinCC flexible software, providing a flexible and scalable HMI platform. Onboard memory and a CompactFlash card slot allow for project storage and data logging.

The SIMATIC MP 370 is widely deployed in manufacturing, automotive, food and beverage, chemical, and water treatment industries. It is suited for applications requiring a robust panel PC-style HMI with reliable communication to SIMATIC controllers, process data visualization, alarm management, and recipe handling. Its industrial-grade construction and wide operating temperature range make it appropriate for installation in control cabinets and harsh production environments.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT Color LCD
Display Colors	256 colors
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 30 W
Communication Interface	MPI/PROFIBUS DP, Ethernet (RJ45), RS-422/RS-485, USB
Memory	12 MB user memory; CompactFlash card slot
Operating System	Windows CE
Configuration Software	WinCC flexible 2004 or higher
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
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. Connection to the configured controller cannot be established.
Check MPI/PROFIBUS DP or Ethernet cable connections. Verify PLC address settings and baud rate configuration in WinCC flexible match the controller settings.
Event ID: 10001: Connection to PLC interrupted during runtime. The panel lost communication with the configured SIMATIC controller.
Inspect physical cabling and connectors. Verify PLC is powered and running. Check for network interference or address conflicts on the bus.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured tag from the PLC.
Verify the tag address in WinCC flexible is correct and corresponds to a valid memory area in the PLC. Check PLC program is active and the data block exists.
Event ID: 40000: Project download error. Transfer of the WinCC flexible project to the panel failed.
Ensure the panel is in Transfer mode. Verify the communication interface settings match between the engineering PC and the panel. Check cable integrity.
Event ID: 50000: System memory low. Available runtime memory on the panel is insufficient for the loaded project.
Reduce the project size by optimizing graphics and scripts. Clear unnecessary data logs or alarm archives stored on the CompactFlash card.
Event ID: 70000: CompactFlash card error. The panel cannot read from or write to the inserted CompactFlash card.
Remove and reinsert the CompactFlash card. Replace the card if the error persists. Ensure the card is formatted correctly and is compatible with the MP 370.
Event ID: 30000: Alarm overflow. The alarm buffer is full and new alarms cannot be recorded.
Acknowledge and clear existing alarms. Increase the alarm buffer size in the WinCC flexible project configuration or enable alarm archiving to the CompactFlash card.

Frequently Asked Questions

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

The MP 370 provides MPI/PROFIBUS DP, Ethernet (RJ45), RS-422/RS-485 serial, and USB interfaces, enabling connection to SIMATIC S7 PLCs and network integration.

Which configuration software is required for this panel?

The panel is configured using Siemens WinCC flexible 2004 or a later compatible version. Projects are transferred to the panel via MPI, PROFIBUS DP, or Ethernet.

What is the supply voltage for the 6AV6446-1BA41-1BA4?

The panel operates on 24 V DC. Ensure a stable, regulated 24 V DC power supply is used to prevent operational issues.

Is the MP 370 compatible with SIMATIC S7-300 and S7-400 controllers?

Yes, the MP 370 supports direct communication with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, as well as S7 communication over Ethernet.

Can the panel store data logs and recipes locally?

Yes, the MP 370 supports data logging and recipe storage using the onboard user memory and an optional CompactFlash card inserted into the card slot.

Troubleshooting

Display remains blank after power on

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

Verify and restore correct 24 V DC supply. If supply is confirmed and display remains blank, the internal power supply board 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. Check if the touch screen calibration has been disrupted or if the screen surface is damaged.

Perform a touch screen recalibration via the panel's Start Center or Control Panel in Windows CE. If recalibration does not resolve the issue, the touch screen overlay may need replacement.

Panel fails to communicate with SIMATIC PLC

Verify MPI or PROFIBUS DP cable connections at both the panel and PLC. Check that the bus address and baud rate configured in WinCC flexible match the PLC settings. Use a bus diagnostic tool if available.

Correct any address or baud rate mismatches in the WinCC flexible project and reload. Replace damaged cables or connectors. Ensure bus termination resistors are correctly placed at both ends of the bus.

WinCC flexible project cannot be transferred to the panel

Confirm the panel is set to Transfer mode via the Start Center. Check that the communication interface selected in WinCC flexible matches the physical connection being used (MPI, Ethernet, or USB).

Switch the panel to Transfer mode, match the interface settings in WinCC flexible, and retry the download. If using Ethernet, verify IP address settings on both the panel and engineering PC are on the same subnet.

Panel reboots unexpectedly or freezes during operation

Check the stability of the 24 V DC power supply for voltage drops or ripple. Review the project for memory-intensive scripts or large graphic objects that may overload the panel CPU.

Stabilize the power supply and ensure it meets the panel's current requirements. Optimize the WinCC flexible project by reducing script complexity and graphic file sizes. If reboots persist, consider a firmware update or panel repair.

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