Siemens 6AV6344-2AD04-0CF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD04-0CF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD04-0CF6 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level human-machine interface applications. This unit features a monochrome STN display and is part of the Comfort/Advanced panel generation predecessor series, offering reliable operator control and monitoring capabilities. The OP 177B is a compact panel PC replacement for pushbutton arrays and traditional operator terminals in industrial environments.

The 6AV6344-2AD04-0CF6 variant is equipped with a 5.7-inch STN LCD display with a resolution of 320 x 240 pixels (QVGA) and supports up to 4 grey scales. It includes both MPI/PROFIBUS DP and RS-422/RS-485 interfaces for PLC connectivity, along with a USB port for project download and peripheral devices. The panel operates on 24 V DC supply voltage and is configured with touch and key operation, providing function keys for direct process control. It supports WinCC flexible as its configuration software platform.

The OP 177B is widely used in manufacturing, automotive, food and beverage, and packaging industries where a cost-effective, robust operator interface is required at the machine level. It is particularly suited for integration with Siemens S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, as well as third-party controllers via serial interfaces. Its compact form factor and front-panel IP65 protection rating make it suitable for panel door mounting in demanding industrial environments.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	4 grey scales
Touch Technology	Touch screen and membrane keys
Input/Operating Voltage	24 V DC
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB
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
Configuration Software	WinCC flexible 2008
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes and System Events

Event ID: 10000: Configuration error: No project loaded or project data is corrupt on the panel.
Re-download the WinCC flexible project to the panel via USB or MPI connection and verify project integrity.
Event ID: 10001: Communication error: Connection to the configured PLC could not be established.
Check MPI/PROFIBUS DP cable connections, verify bus address settings, and confirm PLC is powered and communicating.
Event ID: 10002: Tag read error: A configured tag cannot be read from the PLC.
Verify the tag address exists in the PLC program, check communication link, and confirm data block is present in the PLC.
Event ID: 10003: Tag write error: A value could not be written to the configured PLC tag.
Check PLC tag address, ensure the PLC is not in a write-protected state, and verify communication integrity.
Event ID: 20000: System memory low: Available panel memory is insufficient for current project or runtime operation.
Reduce project size, remove unused images or scripts, and re-download the optimized project to the panel.
Event ID: 40000: Operating system error: Internal panel firmware or OS fault detected.
Perform a panel reset. If the fault persists, update the panel firmware using ProSave and re-download the project.
Event ID: 50000: License error: Required runtime license is missing or invalid on the panel.
Transfer the correct WinCC flexible runtime license to the panel using the Automation License Manager.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 177B 6AV6344-2AD04-0CF6?

The OP 177B is primarily designed for use with Siemens 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 interfaces using standard communication drivers in WinCC flexible.

What software is used to configure the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2008 or later compatible versions. Projects are downloaded to the panel via USB or MPI/PROFIBUS DP connection.

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 resistant to dust ingress and low-pressure water jets, suitable for panel door mounting in industrial environments.

Can the OP 177B operate with both touch and physical keys?

Yes, the OP 177B supports combined operation via its resistive touch screen and dedicated membrane function keys, allowing flexible operator interaction for process control tasks.

What is the supply voltage required for the 6AV6344-2AD04-0CF6?

The OP 177B requires a 24 V DC supply voltage, which is standard for SIMATIC HMI panels and typically sourced from a DIN-rail mounted power supply unit.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check that the supply is within tolerance and that the connector is fully seated.

Restore correct 24 V DC supply voltage. If voltage is correct and display remains blank, the internal backlight or power supply board may be faulty and the panel should be sent for repair or replacement.

Panel fails to communicate with S7-300 PLC via MPI

Verify MPI cable wiring and termination resistors at both ends of the bus. Check that the panel MPI address does not conflict with other devices on the bus and that the baud rate matches the PLC configuration.

Correct any wiring faults, set unique MPI node addresses, ensure bus termination is active only at both physical ends, and confirm baud rate settings match in both WinCC flexible and the PLC hardware configuration.

Touchscreen does not respond or responds inaccurately

Check for physical damage or contamination on the touch surface. Attempt a touchscreen recalibration from the panel's Control Panel menu accessible during startup.

Clean the touch surface with a soft cloth. Perform touchscreen recalibration via the SIMATIC HMI Control Panel. If inaccuracy persists after calibration, the touch foil may be worn or damaged and requires replacement.

Project download fails via USB

Verify that the USB cable is functional and that the correct USB driver for the OP 177B is installed on the engineering PC. Check that ProSave or WinCC flexible transfer mode is active on the panel.

Replace the USB cable if faulty, install the correct Siemens USB driver, and ensure the panel is set to Transfer mode before initiating the download from WinCC flexible or ProSave.

Panel repeatedly reboots or shows a white screen on startup

This may indicate a corrupted project or firmware issue. Attempt to start the panel in Service mode by holding the appropriate key combination during boot to access the loader menu.

Use ProSave to restore the panel firmware to factory state, then re-download the WinCC flexible project. If the issue persists, the panel's flash memory or main board may be defective and requires hardware-level repair.

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