Siemens 6AV6344-2AC34-0MF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC34-0MF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC34-0MF6 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level human-machine interface applications. This unit provides a monochrome STN LCD display and is part of the Comfort/Mobile Panel generation predecessor series, offering reliable operator control and monitoring capabilities. It is manufactured by Siemens and integrates into the broader SIMATIC automation environment.

The OP 177B features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels and supports both touch and key-based operation through its integrated membrane keypad. It communicates via MPI, PROFIBUS DP, and Ethernet interfaces, enabling flexible integration into existing automation networks. The panel runs on WinCC flexible runtime software and offers onboard flash memory for project storage, along with USB ports for data transfer and project download. The unit operates on 24 V DC supply and is rated to IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely used in manufacturing, automotive, food and beverage, and packaging industries where a compact, robust operator panel is required at the machine level. Its combination of keypad and touch operation makes it suitable for environments where gloved operation is necessary. The panel is compatible with Siemens S7-200, S7-300, and S7-400 PLCs, as well as third-party controllers via configurable communication drivers.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	Monochrome (blue-mode)
Touch Technology	Resistive touch screen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45)
USB Interface	USB Type A (host)
IP/Protection Rating	IP65 (front), IP20 (rear)
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
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Configuration error detected during startup; the loaded project is incompatible or corrupted.
Re-download the WinCC flexible project from the engineering station. Verify project version compatibility with the panel firmware.
Event ID: 20000: Communication error on MPI or PROFIBUS DP interface; connection to the PLC has been lost.
Check MPI/PROFIBUS cable connections and termination resistors. Verify bus address settings and baud rate configuration on both the panel and PLC.
Event ID: 40000: Ethernet communication fault; the panel cannot establish a TCP/IP connection to the configured controller.
Verify IP address, subnet mask, and gateway settings on the panel. Check Ethernet cable and network switch connectivity.
Event ID: 50000: Internal flash memory error; project data cannot be read or written correctly.
Perform a panel reset and re-download the project. If the error persists, the internal flash memory may require replacement or the unit may need servicing.
Event ID: 60000: Firmware update error; the firmware transfer was interrupted or the firmware file is invalid.
Restart the firmware update process using the correct firmware version for the OP 177B. Ensure stable power supply and communication link during the update.
Event ID: 70000: Tag update error; a process variable (tag) cannot be read from or written to the connected controller.
Check the tag address configuration in WinCC flexible. Verify the PLC program has the corresponding data blocks or memory areas active and accessible.
Event ID: 80000: Backup/restore error; a project backup or restore operation has failed.
Check the USB storage device for errors and sufficient free space. Retry the backup or restore operation with a formatted USB device.

Frequently Asked Questions

What communication interfaces does the OP 177B (6AV6344-2AC34-0MF6) support?

The OP 177B supports MPI, PROFIBUS DP, and Ethernet (RJ45) interfaces, allowing connection to a wide range of Siemens and third-party controllers. A USB Type A port is also available for project transfer and data logging.

Which PLCs are compatible with the Siemens OP 177B?

The OP 177B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports third-party controllers through configurable communication drivers in WinCC flexible.

What software is used to configure and program the OP 177B?

The OP 177B is configured using Siemens WinCC flexible engineering software. Projects are created on a PC and downloaded to the panel via MPI, PROFIBUS, Ethernet, or USB.

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

The front panel of the OP 177B is rated to IP65, providing protection against dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Can the OP 177B operate with both touch and key input?

Yes, the OP 177B features a resistive touch screen combined with a membrane keypad, allowing operation via touch or physical keys, which is useful in environments where operators wear gloves.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check for blown internal fuse or wiring fault. Verify the power supply can deliver sufficient current.

Ensure the 24 V DC supply is stable and within tolerance. Replace any blown fuse. If the backlight has failed, the display module or backlight inverter may require replacement.

Panel fails to communicate with the PLC via PROFIBUS DP

Check the PROFIBUS cable for continuity and correct termination at both ends of the bus. Verify the bus address configured on the panel matches the address set in the PLC project. Check baud rate settings.

Correct any wiring faults and ensure termination resistors are active only at the physical ends of the bus. Align the PROFIBUS address and baud rate settings in WinCC flexible with the PLC configuration and re-download the project.

Touchscreen does not respond or responds inaccurately

Check for physical damage or contamination on the touch surface. Attempt a touchscreen recalibration through the panel's Control Panel menu in the operating system.

Clean the touch surface with a soft, dry cloth. Perform a touchscreen calibration via the SIMATIC HMI Control Panel. If calibration does not resolve the issue, the touch foil or touch controller board may need replacement.

Project download fails via Ethernet

Verify the IP address, subnet mask, and gateway are correctly configured on both the panel and the engineering PC. Check that the PC and panel are on the same network segment and that no firewall is blocking the WinCC flexible transfer port.

Correct the network configuration on the panel via the Control Panel. Disable any firewall or antivirus software temporarily during the transfer. Retry the project download from WinCC flexible using the correct IP address.

Panel displays 'No project loaded' message after startup

The internal flash memory may not contain a valid project, or the project may have been corrupted during a previous transfer or power loss.

Re-download the WinCC flexible project to the panel via USB or network connection. Ensure power is not interrupted during the transfer process. If the panel repeatedly loses the project, the internal flash memory may be failing and the unit should be serviced.

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