Siemens 6AV6344-2AD24-0CF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD24-0CF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD24-0CF6 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit is a compact, panel-mounted operator panel designed for machine-level visualization and control tasks, offering a monochrome or color display depending on the variant. As part of the SIMATIC HMI Comfort and Basic panel lineage, it is configured and programmed using WinCC flexible or STEP 7 engineering software.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports touch and key-based operation through its integrated function keys. It provides MPI and PROFIBUS DP communication interfaces for direct integration with SIMATIC S7 PLCs, as well as a RS-422/RS-485 serial interface for third-party controller connectivity. The panel includes 512 KB user memory for project data, supports recipe management, alarm logging, and trend display functions, and operates on a 24 V DC supply.

The OP 177B is widely deployed in machine automation, packaging equipment, conveyor systems, and process control applications where a reliable and compact operator interface is required. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 PLC families makes it a standard choice for mid-range automation systems. The rugged front panel design with IP65 protection rating makes it suitable for industrial environments with dust and water ingress concerns.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels
Display Type	STN LCD
Display Colors	256 colors
Input/Operating Voltage	24 V DC
Power Consumption	Max. 10 W
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
User Memory	512 KB
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
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

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 or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Restart both PLC and HMI panel.
Event ID: 10001: Connection timeout to the configured PLC. The HMI panel did not receive a response from the controller within the expected time.
Verify the communication cable integrity and bus termination. Check that the PLC is in RUN mode and the network address is correctly configured in WinCC flexible.
Event ID: 20000: Project download error. The project transfer from the engineering PC to the HMI panel was interrupted or failed.
Check the USB or serial transfer cable. Ensure WinCC flexible version is compatible with the panel firmware. Retry the transfer after restarting the panel in transfer mode.
Event ID: 40000: Internal device error or hardware fault detected during self-test at startup.
Perform a factory reset of the panel. If the error persists, check the 24 V DC supply voltage and inspect the unit for physical damage. The panel may require repair or replacement.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or the firmware file is incompatible with this panel variant.
Re-initiate the firmware update using the correct firmware version for the 6AV6344-2AD24-0CF6. Ensure stable power supply during the update process.
Event ID: 60000: Recipe data error. Recipe records could not be read from or written to the internal memory.
Check available user memory on the panel. Clear unused recipe data or increase allocated memory in the WinCC flexible project settings. Re-download the project.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms exceeds the configured alarm buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in WinCC flexible and increase the alarm buffer size if necessary.

Frequently Asked Questions

Which engineering software is used to configure the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2008 or later. It is not compatible with the newer TIA Portal WinCC Advanced software.

Which PLCs are compatible with the Siemens OP 177B?

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

What is the supply voltage for the 6AV6344-2AD24-0CF6?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the permissible tolerance range as specified in the device manual.

Does the OP 177B support touch screen operation?

The OP 177B supports both touch screen input and physical function key operation. The front panel includes dedicated function keys for navigation and control in addition to the touch-sensitive display.

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

The front panel of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check for blown internal fuses or incorrect polarity on the supply connection.

Correct the supply voltage or polarity. If the supply is confirmed correct and the display remains blank, the internal power supply board or backlight may be faulty and require replacement.

HMI panel fails to communicate with S7 PLC via PROFIBUS DP

Verify the PROFIBUS DP address set on the HMI matches the address configured in the WinCC flexible project. Check bus termination at both ends of the PROFIBUS cable and inspect the cable for damage.

Correct the PROFIBUS address in the project or on the panel. Replace damaged cables and ensure proper 120-ohm termination resistors are installed at both ends of the bus segment.

Touchscreen does not respond to input or is misaligned

Check whether the touch area is physically damaged or contaminated. Access the panel's control panel via the Start Center to run the touch calibration routine.

Clean the touch surface with a soft, dry cloth. Perform a touch screen recalibration through the panel's system settings. If the touchscreen remains unresponsive, the touch foil or controller board may need replacement.

Project cannot be transferred to the panel from the engineering PC

Confirm the panel is in Transfer mode, accessible from the Start Center. Verify the communication cable type and port settings match those configured in WinCC flexible transfer settings.

Switch the panel to Transfer mode manually via the Start Center. Use the correct USB or serial cable and ensure the COM port or USB driver is correctly installed on the engineering PC. Retry the transfer.

Panel repeatedly restarts or enters an error loop at startup

This may indicate a corrupted project file or a failed firmware update. Attempt to boot the panel into the Start Center by holding the appropriate key combination during power-on.

Access the Start Center and perform a factory reset or re-transfer a valid project. If the panel cannot boot to the Start Center, a firmware recovery procedure using the Siemens ProSave tool may be required.

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