Siemens 6AV6446-7BA40-0BY4 SIMATIC MP 370
€ 2.495,00
The Siemens 6AV6446-7BA40-0BY4 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 15-inch TFT display and is part of the MP 370 series, which represents a high-performance panel PC class within Siemens' SIMATIC HMI portfolio. It is intended for use as a stationary operator interface in industrial automation environments.
The MP 370 panel is equipped with a touch-sensitive screen interface and runs on the Windows CE operating system, supporting WinCC flexible runtime for configuration and visualization. It provides multiple communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP), enabling seamless integration with SIMATIC S7 PLCs and other automation systems. The unit offers onboard flash memory and supports external storage via CompactFlash cards, and is built to withstand industrial environments with a robust front panel rated to IP65.
The SIMATIC MP 370 is widely deployed in machine building, automotive manufacturing, process industries, and packaging machinery where a large, high-resolution display is required for complex HMI applications. Its compatibility with SIMATIC S7-300 and S7-400 controllers makes it a standard choice for system integrators working within the Siemens automation ecosystem. The panel's multi-protocol communication capability also allows it to interface with third-party controllers via standard industrial protocols.
Technical Specifications
| Display Size | 15 inch |
|---|---|
| Display Type | TFT color LCD |
| Display Colors | 256 colors |
| Touch Technology | Resistive touchscreen |
| Operating System | Windows CE |
| Input Voltage | 24 V DC |
| Power Consumption | Approx. 30 W |
| Communication Interface | MPI, PROFIBUS DP, Ethernet (TCP/IP), RS-422/485 |
| IP Protection Rating (Front) | IP65 |
| IP Protection Rating (Rear) | IP20 |
| 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: 1000
- Runtime startup error — WinCC flexible runtime failed to start correctly on the panel.
Restart the panel. If the issue persists, reload the project via ProSave or WinCC flexible and check for corrupted project files. - Event ID: 1003
- Communication connection to PLC lost — the HMI cannot establish or maintain a connection to the configured controller.
Check MPI/PROFIBUS/Ethernet cabling and connector integrity. Verify PLC address settings match the HMI project configuration. - Event ID: 10000
- Tag read error — the HMI is unable to read a configured tag from the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check communication link status. - Event ID: 10001
- Tag write error — the HMI failed to write a value to the configured PLC tag.
Check PLC program for write-protected data areas. Verify the tag address and data type in the HMI project configuration. - Event ID: 20000
- System memory low — available runtime memory on the panel is critically low.
Reduce the number of active screens or objects. Archive historical data and clear logs. Consider reducing project complexity. - Event ID: 40000
- Recipe data error — an error occurred during recipe read or write operation.
Check the recipe configuration in WinCC flexible. Verify the storage medium (CompactFlash) is properly inserted and not write-protected. - Event ID: 50000
- Alarm buffer overflow — the alarm buffer has reached its maximum capacity.
Acknowledge and clear pending alarms. Increase the alarm buffer size in the WinCC flexible project settings if possible.
Frequently Asked Questions
Which PLC families are compatible with the SIMATIC MP 370?
The MP 370 is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP, and also supports Ethernet-based communication with S7 controllers. Third-party PLCs can be connected using supported driver protocols in WinCC flexible.
What software is used to configure and program the MP 370?
The MP 370 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 supply voltage for the 6AV6446-7BA40-0BY4?
The panel operates on 24 V DC supply voltage, which is the standard supply for SIMATIC HMI panels.
Does the MP 370 support external storage?
Yes, the MP 370 supports CompactFlash cards for external storage, which can be used for project backup, recipe data, and data logging.
What is the front panel protection rating of this unit?
The front panel of the MP 370 is rated IP65, making it suitable for installation in environments where dust and water spray protection is required.
Troubleshooting
Display remains blank after power on
Measure 24 V DC at the power supply connector. Check the internal fuse and verify the power supply unit is functioning correctly.
Replace the fuse if blown. If the supply voltage is correct but the display remains off, the backlight inverter or the display panel itself may need replacement.
Touchscreen does not respond or responds inaccurately
Check for physical damage to the touch surface. Attempt a touchscreen recalibration via the panel's Start Center or Control Panel settings.
Recalibrate the touchscreen using the calibration utility in the Windows CE Control Panel. If calibration fails repeatedly, the touch controller or touch overlay may require replacement.
HMI cannot connect to PLC via PROFIBUS DP
Verify PROFIBUS cable wiring, termination resistors at both ends of the bus, and that the HMI station address does not conflict with other devices on the network.
Correct any wiring faults, ensure proper bus termination, and confirm the PROFIBUS address in the WinCC flexible project matches the physical DIP switch or software setting on the panel.
Project transfer fails from engineering PC to panel
Check the communication cable between the PC and panel (Ethernet or MPI). Verify the IP address or MPI address settings are correctly configured on both devices.
Ensure the correct transfer channel is selected in WinCC flexible. Reset the panel to transfer mode via the Start Center. Replace the communication cable if faulty.
Panel reboots unexpectedly or freezes during operation
Check the 24 V DC supply for voltage drops or ripple. Review the system event log in WinCC flexible for recurring event IDs indicating memory or runtime errors.
Stabilize the power supply and ensure it meets the panel's current requirements. Reload the project to clear potential runtime corruption. If the issue persists, the panel may require servicing or a firmware update.
| Condition | Repair, Used, Refurbished, New in box (sealed) |
|---|
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