Siemens 6AV6644-0BA01-2AX0 MP 277

€ 1.746,00

SKU: 6AV6644-0BA01-2AX0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6644-0BA01-2AX0 is a Multi Panel (MP 277) belonging to the SIMATIC HMI family, designed for machine-level visualization and operator control in industrial automation environments. This panel features an 8-inch TFT display and runs on the Windows CE operating system, making it suitable for demanding HMI applications. It is part of Siemens' established MP 277 series, which bridges the gap between basic operator panels and full PC-based systems.

The 6AV6644-0BA01-2AX0 is equipped with a touch-sensitive screen and supports a display resolution of 640 x 480 pixels (VGA) with 256 colors. It communicates via PROFIBUS DP and MPI interfaces, and includes USB ports for peripheral connectivity and project transfer. The panel operates on 24 V DC supply voltage and offers 12 MB of user memory for project data, with an integrated flash memory card slot for extended storage. It is compatible with WinCC flexible 2008 engineering software for project configuration.

The MP 277 is widely deployed in machine building, automotive manufacturing, food and beverage processing, and packaging industries. Its robust construction and compatibility with the SIMATIC S7 PLC family make it a reliable choice for machine-level HMI tasks where a mid-range panel with touch operation is required. The panel is suitable for panel mounting in control cabinets and operator stations across a broad range of industrial applications.

Technical Specifications

Display Size	8 inch
Display Resolution	640 x 480 pixels (VGA)
Display Colors	256 colors
Display Type	TFT LCD
Touch Technology	Resistive touch screen
Input/Operating Voltage	24 V DC
Power Consumption	Max. 15 W
User Memory	12 MB
Communication Interface	PROFIBUS DP, MPI, USB
Operating System	Windows CE 5.0
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, cULus
Engineering Software	WinCC flexible 2008

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 interrupted.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC lost during runtime. The HMI panel has detected a timeout on the configured communication link.
Inspect the communication cable for damage or loose connectors. Check the baud rate settings on both the HMI and PLC. Restart both devices if the connection is not restored automatically.
Event ID: 20000: Tag read error. The HMI panel is unable to read a configured tag from the PLC, possibly due to an incorrect address or data type mismatch.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory area. Check for data type consistency between the HMI tag and the PLC variable.
Event ID: 20001: Tag write error. A write operation to a PLC tag has failed, which may be caused by an incorrect address, write protection, or communication fault.
Confirm the target PLC address is correct and writable. Check that the PLC is not in a protected or read-only state. Review the HMI project tag configuration for errors.
Event ID: 40000: Project download error. Transfer of the HMI project to the panel has failed or been interrupted.
Check the USB or PC/PPI cable connection used for transfer. Ensure WinCC flexible is set to the correct transfer channel and that the panel is in transfer mode. Retry the download after restarting the panel.
Event ID: 50000: System memory low. Available memory on the HMI panel is insufficient to load or run the current project.
Reduce the project size by optimizing graphics and scripts. Delete unused project data from the panel. Consider using an external memory card for additional storage.
Event ID: 60000: Hardware fault detected. An internal hardware component of the HMI panel has reported an error condition.
Perform a panel restart. If the fault persists, note the full event ID and contact Siemens technical support or arrange for panel repair and inspection.
Event ID: 70000: Backup/restore error. A backup or restore operation of the panel project or settings has failed.
Verify the memory card is correctly inserted and not write-protected. Ensure sufficient free space is available on the memory card. Retry the backup or restore operation.

Frequently Asked Questions

What communication interfaces does the 6AV6644-0BA01-2AX0 support?

The MP 277 8-inch touch panel supports PROFIBUS DP and MPI communication interfaces for PLC connectivity, as well as USB ports for peripheral devices and project transfer.

Which engineering software is required to configure this HMI panel?

The 6AV6644-0BA01-2AX0 is configured using Siemens WinCC flexible 2008. Projects created with this software are transferred to the panel via USB connection or memory card.

Is this panel compatible with Siemens S7-300 and S7-400 PLCs?

Yes, the MP 277 is fully compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP communication. It can also communicate with S7-200 PLCs using the appropriate protocol settings.

What is the operating voltage for this panel?

The panel operates on a 24 V DC supply voltage. Ensure a stable and regulated 24 V DC power source is used to avoid panel faults or unexpected restarts.

What is the IP protection rating of the MP 277 front panel?

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

Troubleshooting

Display remains blank after power on

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

Ensure the power supply is providing a stable 24 V DC output. Correct any wiring errors or polarity reversals. If the supply is confirmed correct and the display remains blank, the internal power supply board or backlight may require replacement.

HMI panel fails to communicate with the PLC

Verify the PROFIBUS or MPI cable is correctly connected and that bus termination resistors are in place at both ends of the network. Check that the station address configured in the HMI project matches the physical PLC address.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download the project to the panel. Ensure the PLC is powered and in RUN mode.

Touch screen does not respond or responds inaccurately

Check for physical damage or contamination on the touch screen surface. Attempt a touch screen recalibration through the panel's Start Center or Control Panel settings.

Clean the touch screen surface with a soft, dry cloth. Perform a touch screen calibration via the Windows CE Control Panel. If calibration does not resolve the issue, the touch screen overlay may need to be replaced.

Project transfer to panel fails repeatedly

Confirm the panel is set to transfer mode via the Start Center. Check the USB cable connection between the engineering PC and the panel. Verify that the correct transfer channel is selected in WinCC flexible.

Restart the panel and re-enter transfer mode. Try a different USB cable or port. If transfer still fails, perform a factory reset of the panel and attempt the transfer again with a freshly compiled project.

Panel reboots unexpectedly during operation

Monitor the supply voltage for drops or instability under load. Check the operating environment temperature to ensure it is within the 0 °C to +50 °C rated range. Review the system event log for recorded fault events.

Stabilize the 24 V DC power supply and ensure adequate current capacity. Improve cabinet ventilation if overheating is suspected. If reboots persist without a clear cause, inspect the panel for internal hardware faults and consider repair or replacement.

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