Siemens 6AV6644-0BA01-2AX1 MP 277

Name: Siemens 6AV6644-0BA01-2AX1 MP 277
Brand: Siemens
SKU: 6AV6644-0BA01-2AX1
Availability: InStock

Price range: € 1.703,00 through € 3.824,94

Condition

Clear

SKU: 6AV6644-0BA01-2AX1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6644-0BA01-2AX1 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 a 8-inch TFT display and is part of the MP 277 series, which bridges the gap between basic operator panels and full PC-based SCADA systems. It is configured for touch operation and runs the WinCC flexible runtime environment.

The MP 277 8" Touch (6AV6644-0BA01-2AX1) is equipped with a 256-color TFT display at a resolution of 640 x 480 pixels (VGA). It provides a range of communication interfaces including MPI, PROFIBUS DP, and Ethernet (TCP/IP via optional CF card or onboard interface), enabling integration into both legacy and modern Siemens control architectures. The panel includes 12 MB user memory for project data, supports USB host and device ports for peripherals and data transfer, and features a CompactFlash card slot for extended storage. The unit operates on 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The MP 277 is widely deployed in manufacturing, automotive, food and beverage, packaging, and process industries where a reliable mid-range HMI with touch interaction is required. It is commonly used to control and monitor conveyor systems, production lines, and machine tools. Its compatibility with SIMATIC S7-200, S7-300, and S7-400 PLCs makes it a versatile choice for both new installations and system upgrades.

Technical Specifications

Display Size	8 inch
Display Type	TFT LCD
Display Resolution	640 x 480 pixels (VGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen
Input Voltage	24 V DC
Power Consumption	Max. 18 W
User Memory	12 MB
Communication Interface	MPI, PROFIBUS DP, USB (host and device), Ethernet (RJ45)
Storage Expansion	CompactFlash card slot
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
Series	SIMATIC HMI MP 277

Common Error Codes & System Events

Event ID: 10000: Configuration error detected during project download or startup. The project file may be incompatible or corrupted.
Re-download the project from WinCC flexible. Verify the project is compiled without errors and matches the target panel type.
Event ID: 20000: Communication error with the configured PLC or controller. The HMI cannot establish or maintain a connection.
Check MPI/PROFIBUS/Ethernet cabling and termination resistors. Verify the PLC address and communication parameters match the HMI project settings.
Event ID: 40000: Runtime license error. The WinCC flexible runtime license is missing or invalid for the project size.
Verify the runtime license installed on the panel matches the project requirements. Transfer a valid license using the Automation License Manager.
Event ID: 50000: Internal device error or hardware fault detected during self-test at startup.
Perform a factory reset and re-download the project. If the fault persists, the panel may require hardware repair or replacement.
Event ID: 70000: Tag or variable update error. A configured tag cannot be read or written within the defined timeout period.
Check PLC program to confirm the tag address exists and is accessible. Verify communication cycle time settings in the HMI project.
Event ID: 80000: Memory overflow or insufficient user memory to load the project or runtime data.
Reduce the project size, optimize graphics, or clear unused data from the panel memory. Consider using a CompactFlash card for extended storage.
Event ID: 110000: Script or VB scripting runtime error encountered during panel operation.
Review and debug the VB scripts in WinCC flexible. Check for division by zero, null references, or unsupported functions on this panel type.

Frequently Asked Questions

Which PLC families are compatible with the MP 277 6AV6644-0BA01-2AX1?

The MP 277 is compatible with SIMATIC S7-200, S7-300, S7-400, and WinAC controllers via MPI or PROFIBUS DP. Ethernet-based communication with S7 PLCs is also supported via the onboard RJ45 interface.

What software is used to program and configure this HMI panel?

The MP 277 is configured using Siemens WinCC flexible 2008 or later. Projects are compiled and downloaded to the panel via MPI, PROFIBUS, USB, or Ethernet connection.

What is the display resolution of the 6AV6644-0BA01-2AX1?

The panel features a 640 x 480 pixel (VGA) resolution TFT display with 256-color support and resistive touch input.

Can the MP 277 store data on external media?

Yes, the MP 277 includes a CompactFlash card slot that can be used for project storage, data logging, and recipe management. USB ports are also available for connecting external storage devices.

What is the front panel protection rating of this unit?

The front face of the MP 277 is rated IP65, providing full protection against dust ingress and low-pressure water jets, making it suitable for panel mounting in industrial enclosures.

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 voltage is within the acceptable range and that polarity is correct.

Correct any wiring errors or supply voltage issues. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight inverter may be faulty and require replacement.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen via the panel's Start Center or Control Panel menu. Check for physical damage or contamination on the screen surface.

Perform a touchscreen recalibration through the SIMATIC HMI Start Center. If calibration does not resolve the issue, the resistive touch overlay may be worn or damaged and require replacement.

HMI cannot communicate with the connected PLC

Verify the communication cable type and wiring (MPI, PROFIBUS, or Ethernet). Check that the PLC address configured in the HMI project matches the actual PLC station address.

Correct any address mismatches in the WinCC flexible project and re-download. Inspect and replace faulty cables or connectors. Ensure PROFIBUS termination resistors are correctly placed at both ends of the bus.

Panel repeatedly restarts or fails to load the project

Check the CompactFlash card seating and integrity. Attempt to boot into the Start Center by holding the appropriate key combination during power-on to determine if the issue is project-related or hardware-related.

Re-download the project from WinCC flexible after verifying it compiles without errors. If the panel fails to boot even without a project, perform a factory reset via the Start Center or service menu. Replace the CompactFlash card if it is found to be corrupted.

Panel displays 'No project loaded' after power cycle

The project stored in flash memory may have been lost due to a corrupted download or a failed firmware update. Check the panel memory status in the Start Center.

Re-download the project using WinCC flexible via USB or Ethernet. Ensure the download completes fully without interruption. Verify that the panel firmware version is compatible with the WinCC flexible project version being used.

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