Siemens 6AV6344-2AD04-0MF6 OP 177B

€ 2.495,00

SKU: 6AV6344-2AD04-0MF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD04-0MF6 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level visualization and operator control in industrial automation environments. This unit features a monochrome STN display and is part of the Comfort/Mobile Panel generation that bridges basic text-based operation with graphical HMI functionality. It is configured and programmed using Siemens WinCC flexible engineering software.

The OP 177B (6AV6344-2AD04-0MF6) is equipped with a 5.7-inch STN display capable of rendering graphics and text for process visualization. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel includes function keys and a membrane keypad for operator input, onboard flash memory for project storage, and operates on a 24 V DC supply. It carries IP65 protection on the front face, making it suitable for panel-mount installations in environments with dust and water ingress.

The OP 177B is widely deployed in machine building, packaging machinery, conveyor systems, and process plant control panels where a compact, robust operator interface is required. Its compatibility with the SIMATIC S7 PLC range and support for PROFIBUS DP makes it a practical choice for retrofitting existing automation systems or integrating into new mid-range machine control architectures. Industries such as food and beverage, automotive manufacturing, and general factory automation commonly use this panel for local machine HMI duties.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Colors	Monochrome (blue-mode)
Input Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI, PROFIBUS DP
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 mount
Engineering Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between HMI panel and PLC. Connection to the configured controller cannot be established or has been lost.
Check PROFIBUS DP or MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Timeout error on the communication link. The HMI did not receive a response from the PLC within the configured timeout period.
Check network cabling and bus termination. Reduce bus load or increase the configured communication timeout value in WinCC flexible project settings.
Event ID: 20000: Project download error. The project transfer from the engineering PC to the HMI panel failed or was interrupted.
Verify the transfer cable connection and PC communication settings. Ensure WinCC flexible is set to the correct transfer mode and the panel is in transfer mode. Retry the download.
Event ID: 40000: Configuration error detected. The loaded project contains settings incompatible with the current panel firmware version.
Update the panel firmware to match the WinCC flexible version used to create the project, or recompile the project using a compatible software version and re-download.
Event ID: 50000: Internal device error. A hardware fault has been detected within the HMI panel.
Perform a panel restart. If the error persists, note the full event ID and contact Siemens technical support or arrange for hardware inspection and repair.
Event ID: 60000: Flash memory error. The internal flash memory used for project storage has reported a read or write fault.
Attempt to re-download the project to the panel. If the error recurs, the internal flash memory may require replacement by a qualified repair technician.
Event ID: 70000: Operating system error. The panel operating system has encountered an unrecoverable fault.
Perform a factory reset using the panel loader menu. Re-download the firmware and project. If the fault persists, the unit requires hardware-level repair or replacement.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD04-0MF6)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-1200 and S7-1500 PLCs in some configurations using appropriate drivers in WinCC flexible.

What engineering software is required to program this HMI panel?

The OP 177B is programmed using Siemens WinCC flexible 2005 or a later version. The project is transferred to the panel via a PC adapter cable connected to the MPI port or via PROFIBUS.

What is the supply voltage for the 6AV6344-2AD04-0MF6?

The panel operates on a 24 V DC supply. The power input is typically connected via a 2-pin terminal block on the rear of the unit.

What is the front panel protection rating of the OP 177B?

The front face of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout with the supplied seal.

Can the OP 177B be used as a replacement for older Siemens OP panels?

Yes, the OP 177B is designed to be a functional successor to earlier Siemens operator panels such as the OP 17 and OP 27. Existing projects may require migration and adaptation in WinCC flexible before downloading to the OP 177B.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the rear power terminal block. Check for correct polarity. Inspect the internal fuse if accessible.

Correct any supply voltage issues or reverse polarity wiring. If supply voltage is confirmed correct and the display remains blank, the internal power supply board or backlight may have failed and requires repair or replacement.

HMI panel cannot establish communication with the PLC

Verify the PROFIBUS DP or MPI bus cable is correctly connected and terminated at both ends. Check that the bus address configured in the HMI project matches the physical address set on the PLC. Use a bus diagnostic tool to check for bus errors.

Replace or reseat the communication cable. Correct address mismatches in the WinCC flexible project and re-download. Ensure only one bus terminator is active at each end of the network segment.

Project download from PC to panel fails or times out

Check the PC adapter cable connection to the MPI port on the panel. Confirm the panel is in transfer mode (accessible via the panel loader menu). Verify the COM port or USB adapter settings in WinCC flexible match the physical connection.

Restart the panel into transfer mode and retry the download. Try a different PC adapter cable or USB port. Ensure no firewall or antivirus software is blocking the WinCC flexible transfer process.

Touchscreen or keypad inputs are not responding correctly

Check for physical damage to the membrane keypad or front panel. Perform a keypad test from the panel's service menu if available. Inspect for contamination or moisture ingress around the keypad area.

Clean the keypad surface with a dry cloth. If individual keys are unresponsive due to membrane damage, the front panel membrane assembly requires replacement. Recalibrate or replace the unit if faults persist.

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

The internal flash memory may not be retaining the downloaded project, or the project download was incomplete. Check if the project was successfully transferred without errors during the last download session.

Re-download the project using WinCC flexible, ensuring the transfer completes without interruption. If the panel consistently fails to retain the project after power cycling, the internal flash memory may be faulty and the unit requires repair.

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