Siemens 6AV6344-2AD24-0MG7 OP177B

€ 1.995,00

SKU: 6AV6344-2AD24-0MG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD24-0MG7 is an OP177B operator panel belonging to the SIMATIC HMI series, designed for machine-level visualization and operator control in industrial automation environments. This unit provides a monochrome display interface for process monitoring and control, and is part of Siemens' established line of operator panels intended for panel mounting in control cabinets and machinery. The OP177B is configured for use with SIMATIC S7 and other compatible Siemens controllers via standard communication interfaces.

The 6AV6344-2AD24-0MG7 features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels, offering clear readability in industrial lighting conditions. The panel supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. It includes function keys and a membrane keypad for operator input, with configurable softkeys for application-specific control. The unit operates on a 24 V DC supply and is rated IP65 at the front panel, providing protection against dust and water ingress in demanding environments.

The OP177B is widely deployed in machine tool control, conveyor systems, packaging machinery, and process plant equipment where a compact, robust operator interface is required. Its compatibility with the SIMATIC S7 controller family makes it a practical choice for retrofitting existing S7-based installations or building new control panels. The panel is configured using WinCC flexible engineering software, which supports structured project development and reuse across the SIMATIC HMI product range.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Resolution	320 x 240 pixels
Input Voltage	24 V DC
Voltage Range	19.2 – 28.8 V DC
Communication Interface	MPI, PROFIBUS DP
IP Rating (Front)	IP65
IP 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, cULus
Engineering Software	WinCC flexible
Series	SIMATIC HMI OP177B

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup; the loaded project is incompatible with the panel firmware version.
Re-transfer the project using a compatible version of WinCC flexible. Ensure firmware and project versions match.
Event ID: 20000: Communication link to the PLC has been interrupted or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings and baud rate configuration in the project.
Event ID: 40000: Tag read/write error; the panel cannot access a configured PLC data address.
Verify the PLC data block and address referenced in the HMI project exist and are accessible. Check PLC program for address conflicts.
Event ID: 50000: Project download failed or was interrupted during transfer to the panel.
Restart the transfer process from WinCC flexible. Check the transfer cable or network connection and ensure the panel is in transfer mode.
Event ID: 60000: Internal panel memory error or corrupted project data detected.
Perform a factory reset on the panel and re-transfer the project. If the error persists, the internal flash memory may require service.
Event ID: 70000: Licence or runtime error; the HMI runtime could not start correctly.
Check that the correct runtime licence is present on the panel. Re-transfer the project and restart the device.
Event ID: 80000: Power supply undervoltage detected; supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel connector. Ensure the power supply unit is rated for the panel load and check wiring for voltage drop.

Frequently Asked Questions

Which PLCs are compatible with the OP177B 6AV6344-2AD24-0MG7?

The OP177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with other Siemens controllers that support these protocols.

What software is used to configure and program the OP177B?

The OP177B is configured using Siemens WinCC flexible engineering software. Projects are transferred to the panel via MPI, PROFIBUS DP, or a serial PC/PPI cable.

What is the front panel protection rating of the 6AV6344-2AD24-0MG7?

The front panel of the OP177B is rated IP65, providing full protection against dust ingress and protection against low-pressure water jets.

What is the supply voltage requirement for this panel?

The OP177B requires a 24 V DC supply with an operating range of 19.2 V DC to 28.8 V DC.

Can the OP177B be used as a replacement for older SIMATIC OP panels?

Yes, the OP177B is designed to be compatible with and serve as a replacement for older SIMATIC OP7 and OP17 operator panels, with appropriate project migration in WinCC flexible.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify the voltage is within the 19.2–28.8 V DC operating range. Inspect the supply wiring and connector for loose connections.

Restore the supply voltage to within specification. If voltage is correct and the display remains blank, the internal power supply board or backlight may be faulty and the unit should be sent for repair or replacement.

Panel displays 'No connection to PLC' or communication alarm on screen

Inspect the MPI or PROFIBUS DP cable for physical damage and verify correct termination at both ends of the bus. Check that the PLC address and baud rate configured in the HMI project match the actual PLC settings.

Replace or reseat the communication cable. Correct any address or baud rate mismatches in the WinCC flexible project and re-transfer to the panel. Ensure bus termination resistors are correctly placed at the bus endpoints.

Project transfer from WinCC flexible fails or times out

Verify the transfer cable connection between the PC and the panel. Confirm the panel is set to transfer mode (accessible via the Start Center or loader menu). Check that the WinCC flexible version is compatible with the panel firmware.

Restart the panel in transfer mode and retry the download. Update or match the WinCC flexible version to the panel firmware. If using a USB-to-serial adapter, ensure the correct driver is installed and the COM port is correctly assigned.

Touchscreen or keypad inputs are not responding correctly

For keypad issues, inspect the membrane keypad connector internally for corrosion or damage. Check whether the fault is consistent across all keys or limited to specific keys, which may indicate a partial membrane failure.

Clean the keypad connector contacts. If individual keys are unresponsive, the membrane keypad assembly requires replacement. For persistent issues across all inputs, the main CPU board may require inspection.

Panel repeatedly restarts or enters a boot loop

This may indicate corrupted firmware or a failed project transfer. Attempt to access the Start Center or loader menu during boot by pressing the appropriate key combination. Check the 24 V DC supply for voltage fluctuations.

Perform a firmware update or factory reset via the Start Center. Re-transfer a valid project using WinCC flexible. If the boot loop persists after firmware restoration, the internal flash memory or CPU module may be defective.

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