Siemens 6AV6446-1BA41-0BB4 SIMATIC MP 370

Name: Siemens 6AV6446-1BA41-0BB4 SIMATIC MP 370
Brand: Siemens
SKU: 6AV6446-1BA41-0BB4
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6446-1BA41-0BB4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6446-1BA41-0BB4 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 both WinCC flexible and SIMATIC ProTool/Pro runtime environments. It is part of Siemens' established SIMATIC HMI panel range, offering robust hardware suited for industrial environments.

The MP 370 features a 12.1-inch TFT color display with a resolution of 800 x 600 pixels (SVGA) and supports touch screen operation as well as an integrated keyboard interface. It is equipped with a 32 MB Flash memory and 32 MB RAM, providing sufficient capacity for complex visualization projects. Communication interfaces include MPI/PROFIBUS DP, Industrial Ethernet (RJ45), and a USB port, enabling flexible integration into existing Siemens automation architectures. The unit operates on a 24 V DC supply and is rated to IP65 on the front panel.

The SIMATIC MP 370 is widely deployed in manufacturing automation, machine tool control, packaging machinery, and process plant environments where a reliable and capable HMI terminal is required. Its compatibility with SIMATIC S7 PLCs and support for PROFIBUS DP and Ethernet makes it particularly suitable for integration into Siemens TIA and STEP 7 automation systems. The panel's rugged construction and wide operating temperature range make it appropriate for use in factory floor and light industrial process environments.

Technical Specifications

Display Size	12.1 inch
Display Resolution	800 x 600 pixels (SVGA)
Display Type	TFT Color LCD
Touch Technology	Resistive Touch Screen
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 30 W
Flash Memory	32 MB
RAM	32 MB
Communication Interface	MPI/PROFIBUS DP, Industrial Ethernet (RJ45), USB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
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 DP or Ethernet cabling and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both devices if necessary.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI panel lost communication with the configured controller.
Inspect network cables and connectors for damage. Verify PLC is powered and in RUN mode. Check bus termination and cable shielding.
Event ID: 20000: Project download error. The transfer of the HMI project from the engineering PC to the panel failed.
Verify the transfer cable and interface settings. Ensure the panel is in Transfer mode. Check that WinCC flexible version is compatible with the panel firmware version.
Event ID: 40000: System memory low. Available RAM on the HMI panel is insufficient to run the current project.
Reduce the complexity of the HMI project, decrease the number of active screens or variables. Consider archiving historical data to an external storage device.
Event ID: 70000: Internal device error or hardware fault detected during self-test at startup.
Perform a power cycle. If the error persists, back up the project and perform a factory reset. Contact Siemens technical support if the fault recurs after reset.
Event ID: 110000: Tag update error. One or more process tags could not be read or written within the configured cycle time.
Check PLC program to ensure the configured tags exist and are accessible. Verify communication load on the bus is within acceptable limits. Increase tag update cycle time if necessary.
Event ID: 130000: Recipe data error. A recipe record could not be read from or written to the configured storage location.
Check that the storage medium (internal Flash or external memory card) is present and not write-protected. Verify recipe configuration in WinCC flexible project.

Frequently Asked Questions

What PLC systems is the SIMATIC MP 370 compatible with?

The MP 370 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. It also supports communication with S7 controllers over Industrial Ethernet using the integrated RJ45 port.

What software is required to program and configure the MP 370?

The MP 370 is configured using Siemens WinCC flexible or the older SIMATIC ProTool/Pro engineering software. WinCC flexible 2008 is the recommended version for this panel generation.

What is the operating voltage of the 6AV6446-1BA41-0BB4?

The panel operates on a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, typically around 1.5 A or more depending on the application load.

Does the MP 370 support external memory cards?

Yes, the MP 370 supports CompactFlash (CF) cards for project storage, data logging, and recipe management, providing expanded storage capacity beyond the internal Flash memory.

What is the front panel protection rating of this unit?

The front panel of the MP 370 6AV6446-1BA41-0BB4 is rated to IP65, making it resistant to dust ingress and low-pressure water jets, suitable for typical machine front panel installations.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the acceptable range. Inspect the internal fuse if accessible.

Correct any supply voltage issues. If the supply voltage is correct and the display remains blank, the internal power supply board or backlight inverter may have failed and the unit will require repair or replacement.

HMI panel fails to communicate with the S7 PLC via PROFIBUS DP

Verify the PROFIBUS cable connections at both the panel and PLC ends. Check that the bus termination resistors are correctly enabled at both ends of the PROFIBUS segment. Confirm that the MPI/DP address configured in the HMI project matches the physical address set on the panel.

Replace or reseat the PROFIBUS connector. Correct the bus address settings in the WinCC flexible project and re-download. Ensure only the two physical end nodes have termination resistors active.

Touch screen does not respond accurately or registers incorrect touch positions

Check whether the touch screen calibration has drifted. Access the panel's Control Panel via the Start menu in Transfer mode or via the system settings to run the touch calibration routine.

Perform a touch screen recalibration using the built-in calibration tool in the SIMATIC panel Control Panel. If calibration does not resolve the issue, the touch screen overlay may be damaged and require replacement.

Project transfer from engineering PC to panel fails repeatedly

Verify that the panel is set to Transfer mode. Check the communication interface settings in WinCC flexible match the physical connection being used (MPI, Ethernet, or USB). Confirm the PC firewall is not blocking the transfer.

Switch the panel to Transfer mode manually via the loader screen. Ensure the correct interface and baud rate are selected in WinCC flexible Transfer settings. Disable PC firewall temporarily to rule out network blocking issues.

Panel displays 'No project loaded' or boots to the loader screen on every startup

This typically indicates that the project stored in Flash memory has been lost or corrupted, or the panel has been reset to factory defaults.

Re-download the HMI project from the engineering PC using WinCC flexible. If the problem recurs after power cycles, the internal Flash memory may be failing and the panel should be sent for repair.

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