Siemens 6AV6344-2AD34-0CF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD34-0CF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD34-0CF6 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/Advanced panel generation predecessor series, offering reliable human-machine interface functionality for mid-range applications. The OP 177B is engineered for direct integration with Siemens SIMATIC S7 controllers as well as third-party PLCs via standardized communication protocols.

The 6AV6344-2AD34-0CF6 variant is equipped with a 5.7-inch STN LCD display with a resolution of 320 x 240 pixels (QVGA), supporting monochrome graphics. It provides both MPI/PROFIBUS DP and RS-422/RS-485 serial interfaces for controller connectivity, enabling flexible integration into existing automation networks. The panel operates on a 24 V DC supply and includes onboard flash memory for project storage, with configuration performed via Siemens WinCC flexible engineering software. A USB interface is available for project download and peripheral device connection.

The OP 177B is widely deployed in machine building, packaging machinery, conveyor systems, and process automation where a compact, robust operator interface is required. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 controller families makes it a versatile choice for retrofit and new installation projects. The panel's industrial-grade construction and wide operating temperature range suit it for demanding factory floor environments.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	Monochrome STN LCD
Display Colors	Monochrome (blue-mode)
Input Voltage	24 V DC
Power Consumption	Max. 8 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB
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
Series/Product Family	SIMATIC HMI OP 177B
Engineering Software	WinCC flexible 2008 or later
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been lost.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI panel has lost communication with the configured controller.
Inspect physical cabling for damage or loose connectors. Check bus termination and cable shielding. Restart both the HMI panel and the PLC if the connection does not recover automatically.
Event ID: 20000: Project download error. Transfer of the WinCC flexible project to the panel has failed.
Verify USB or serial cable connection. Ensure the panel is in Transfer mode before initiating download. Check that the WinCC flexible project version is compatible with the panel firmware version.
Event ID: 40000: Internal device error or system fault detected. The panel has encountered an unrecoverable internal error.
Perform a panel restart. If the fault persists, perform a factory reset via the panel's Start Center menu. Re-download the project and check for hardware faults.
Event ID: 50000: Flash memory write error. The panel was unable to write data to internal flash memory, which may indicate memory corruption or hardware failure.
Attempt a factory reset and re-download the project. If the error persists, the internal flash memory may be faulty and the unit should be sent for repair or replacement.
Event ID: 70000: Tag update error. One or more configured tags could not be read from or written to the PLC within the configured cycle time.
Check PLC program to ensure the configured tag addresses exist and are accessible. Reduce the number of tags or increase the update cycle time in the WinCC flexible project settings.
Event ID: 30000: Firmware update error. The firmware update process was interrupted or failed to complete successfully.
Retry the firmware update using the correct firmware file for the OP 177B. Ensure stable power supply during the update process. Do not interrupt power during firmware flashing.

Frequently Asked Questions

What engineering software is required to configure the OP 177B (6AV6344-2AD34-0CF6)?

The OP 177B is configured using Siemens WinCC flexible 2008 or a compatible later version. Projects are downloaded to the panel via USB or serial interface.

Which Siemens PLCs are compatible with this operator panel?

The OP 177B supports communication with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports connectivity to third-party controllers via RS-422/RS-485 serial protocols.

What is the supply voltage for the 6AV6344-2AD34-0CF6?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid operational issues.

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

The front panel of the OP 177B carries an IP65 protection rating, making it suitable for environments where dust and water spray may be present.

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

Yes, the OP 177B is commonly used as a replacement for older SIMATIC HMI panels such as the OP 17 and OP 27, provided the project is re-engineered in WinCC flexible to suit the new panel's display resolution and feature set.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check for blown internal fuses or wiring faults. Verify that the supply voltage is within the specified tolerance.

Correct any wiring faults or supply voltage issues. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight may be faulty and the unit should be inspected for repair.

HMI panel shows 'No connection to PLC' message at runtime

Check the MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Verify bus termination resistors are correctly installed at both ends of the network. Confirm that the PLC station address matches the address configured in the WinCC flexible project.

Reseat all connectors and replace any damaged cables. Correct the station address settings in the project or on the PLC. Ensure only the two physical end nodes of the bus have termination resistors enabled.

Project download fails or transfer mode cannot be activated

Confirm the panel is set to Transfer mode via the Start Center menu. Check the USB cable or serial cable for damage. Verify that the PC running WinCC flexible has the correct COM port or USB driver installed.

Replace the transfer cable if damaged. Manually activate Transfer mode on the panel before initiating the download from WinCC flexible. Update USB drivers on the engineering PC if the panel is not recognized.

Touchscreen or function keys are unresponsive

Check whether the panel is in Transfer mode or displaying a system screen that blocks operator input. Inspect the front panel for physical damage to the keypad membrane or display surface.

Exit Transfer mode and return to runtime operation. If keys remain unresponsive, perform a panel restart. Persistent keypad failure may indicate a damaged membrane keypad assembly requiring hardware replacement.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file in flash memory or a firmware issue. Check whether the panel reaches the Start Center menu during boot or fails before that point.

Access the Start Center and perform a factory reset to clear the flash memory. Re-download a valid WinCC flexible project. If the boot loop persists after a factory reset, the internal flash memory or main board may be faulty and the unit requires repair.

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