Siemens 6AV6344-2AC24-0CF7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC24-0CF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC24-0CF7 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit is a compact, keypad-based operator panel designed for machine-level visualization and control tasks. It is part of the Comfort and Advanced HMI panel range and is configured for use with Siemens SIMATIC controllers and compatible third-party systems.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA) and supports up to 256 colors. It is equipped with a membrane keypad for operator input and includes communication interfaces such as MPI/PROFIBUS DP and RS-422/RS-485, enabling direct integration with S7-200, S7-300, and S7-400 PLCs. The panel operates on 24 V DC and includes an integrated configuration memory, supporting WinCC flexible as the engineering software platform.

The OP 177B is widely used in manufacturing, process automation, and machine tool applications where a robust, panel-mount HMI with reliable keypad input is required. Its compact form factor and broad PLC compatibility make it suitable for retrofitting existing installations as well as new machine builds in industries such as automotive, food and beverage, and packaging.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Display Type	STN color LCD
Input Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485
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 mount
Series/Product Family	SIMATIC HMI OP 177B
Engineering Software	WinCC flexible 2008

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings and ensure the PLC is in RUN mode. Check baud rate configuration in WinCC flexible project.
Event ID: 10001: Timeout error on the communication channel. The HMI did not receive a response from the PLC within the configured timeout period.
Increase the communication timeout value in the HMI project settings. Check for cable faults or excessive bus loading. Verify PLC is operational and responding.
Event ID: 20000: Project download error. The configuration project could not be transferred to the HMI panel successfully.
Check the PC-to-panel connection (USB or serial). Ensure WinCC flexible version is compatible with the panel firmware. Retry the download after restarting both the panel and the engineering PC.
Event ID: 40000: System memory low. The available memory on the HMI panel is insufficient to load or run the current project.
Reduce the project size by removing unused screens, images, or variables. Archive old alarm logs. Consider using an external memory card if supported.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or the firmware file is incompatible with this panel variant.
Restart the panel and retry the firmware update using the correct firmware version for the 6AV6344-2AC24-0CF7. Use ProSave or WinCC flexible to perform the update.
Event ID: 60000: Tag read/write error. A configured variable (tag) could not be read from or written to the connected controller.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address conflicts or access protection settings.
Event ID: 70000: Recipe data error. A recipe record could not be read, written, or transferred correctly.
Check recipe configuration in WinCC flexible. Ensure the recipe data record structure matches the PLC data block layout. Verify available memory on the panel.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC24-0CF7)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports communication with S5 controllers and select third-party systems via the RS-422/RS-485 interface.

What engineering software is required to configure this panel?

The OP 177B is configured using Siemens WinCC flexible 2008 or later compatible versions. Projects are downloaded to the panel via USB or serial connection using WinCC flexible or the ProSave utility.

What is the supply voltage for the 6AV6344-2AC24-0CF7?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel consumes up to 9 W under normal operating conditions.

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

The front panel of the OP 177B achieves IP65 protection when correctly installed in a panel cutout with the supplied seal, making it suitable for environments with dust and water spray.

Can the OP 177B display alarms and event logs?

Yes, the OP 177B supports alarm management including alarm logging, alarm display, and acknowledgment functions. Alarm history can be stored in the panel memory and reviewed by the operator directly on the device.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector. Measure voltage under load to rule out supply issues. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is within tolerance and capable of supplying sufficient current. If the supply is confirmed good, the internal power supply board or backlight may be faulty and the unit should be sent for repair or replacement.

HMI panel shows 'No connection to PLC' or communication error on startup

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the PLC address configured in the WinCC flexible project matches the actual PLC station address.

Replace or reseat the communication cable. Correct the PLC address in the project and re-download. Ensure termination resistors are enabled only at the physical ends of the bus segment.

Touchscreen or keypad inputs are not responding correctly

For keypad issues, inspect the membrane keypad for physical damage or contamination beneath the keys. Check if the panel is in transfer mode or if a screensaver is active.

Clean the keypad surface. If keys are physically damaged, the membrane keypad assembly should be replaced. Recalibrate the panel if applicable, or restore the project to rule out software configuration issues.

Project download fails or transfer is interrupted

Check the USB or serial cable connection between the engineering PC and the panel. Confirm the panel is in transfer mode (accessible via the Start Center on the panel).

Switch the panel to transfer mode manually via the Start Center menu. Use a known-good USB cable and ensure the correct COM port or USB driver is selected in WinCC flexible. Retry the download after restarting both devices.

Panel displays corrupted graphics or incorrect screen content

This may indicate a corrupted project file on the panel or a memory fault. Attempt to re-download the project from WinCC flexible to overwrite the panel memory.

Perform a complete project re-download using WinCC flexible. If corruption persists, perform a factory reset via the Start Center and re-download the project. If the issue continues, the panel memory may be faulty and hardware repair is required.

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