Siemens 6AV6344-2AD34-0CG7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD34-0CG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD34-0CG7 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit is a compact panel PC designed for machine-level visualization and operator control, offering a monochrome or color display depending on the variant. As part of the SIMATIC HMI Comfort and Basic panel lineage, it is engineered for reliable integration into Siemens-based automation environments.

The OP 177B features a 5.7-inch STN display and supports both touch and key-based operation, providing flexibility for different operator environments. It includes PROFIBUS DP and MPI communication interfaces for direct connection to SIMATIC S7 PLCs, as well as an RS-422/RS-485 serial interface. The panel runs on WinCC flexible runtime software, supports recipe management, alarm logging, and trend displays, and provides onboard flash memory for project storage. The unit operates on 24 V DC supply voltage and is rated IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely deployed in machine tool control, packaging machinery, conveyor systems, and general factory automation where a compact, robust operator interface is required. Its compatibility with SIMATIC S7-200, S7-300, and S7-400 PLCs makes it a versatile choice for both new installations and retrofit projects. The panel's front-face IP65 rating and wide operating temperature range make it suitable for industrial environments with moderate levels of dust and moisture.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 px (QVGA)
Touch Technology	Touch screen and function keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	PROFIBUS DP, MPI, RS-422/RS-485
Memory	4 MB flash (user memory)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes and System Events

Event ID: 10000: Configuration error detected during startup; project data on the device may be corrupt or incompatible with the runtime version.
Re-transfer the project from WinCC flexible to the panel. Ensure the WinCC flexible version matches the panel firmware version.
Event ID: 20000: Communication error on PROFIBUS DP or MPI interface; the panel cannot establish a connection to the configured PLC.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the PLC address and baud rate settings match the panel configuration.
Event ID: 40000: Tag read/write error; the panel is unable to read or write a configured tag from the PLC.
Verify the PLC data block and address referenced in the tag configuration exist and are accessible. Check PLC program for correct DB structure.
Event ID: 50000: Recipe data error; a recipe record could not be read from or written to the panel memory.
Check available flash memory on the panel. Re-transfer the project and verify recipe configuration in WinCC flexible.
Event ID: 60000: Alarm buffer overflow; the number of pending alarms has exceeded the configured buffer size.
Acknowledge and clear active alarms. Increase the alarm buffer size in the WinCC flexible project configuration if overflow recurs.
Event ID: 70000: System memory low; available runtime memory is insufficient for current project demands.
Reduce the number of active screens, tags, or logged data in the project. Consider simplifying the project structure or upgrading to a higher-specification panel.
Event ID: 80000: Firmware update error; a firmware update process was interrupted or failed to complete successfully.
Repeat the firmware update procedure using ProSave or WinCC flexible. Ensure stable 24 V DC power supply during the update process.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD34-0CG7)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with S7-1200 and S7-1500 via PROFIBUS DP in certain configurations.

What software is required to program and configure this panel?

The OP 177B is configured using Siemens WinCC flexible software. The project is transferred to the panel via a PC adapter cable connected to the MPI/PROFIBUS interface or via a USB-to-MPI adapter.

What is the supply voltage for the 6AV6344-2AD34-0CG7?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel consumes up to 12 W under normal operating conditions.

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

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

Can the OP 177B firmware be updated in the field?

Yes, the firmware can be updated using the Siemens ProSave tool or via WinCC flexible. The update is transferred through the MPI/PROFIBUS interface or a compatible serial connection.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply terminals of the panel. Check that the supply voltage is within the specified range and that the power connector is fully seated.

If voltage is present and correct, perform a reset by holding the reset button. If the display remains blank, the internal backlight or power supply board may be faulty and require replacement.

Panel cannot communicate with the PLC

Verify the PROFIBUS or MPI cable is correctly connected and terminated at both ends. Check the bus address configured on the panel matches the PLC network settings.

Replace or reseat the communication cable. Confirm baud rate and station address settings in WinCC flexible match the PLC configuration. Test with a known-good cable to rule out cable faults.

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 system settings menu.

Clean the touch surface with a soft, dry cloth. Perform a recalibration via the Control Panel in the panel's Start Center. If the issue persists, the touch foil or controller board may need replacement.

Project transfer from WinCC flexible fails

Check the PC adapter or USB-to-MPI adapter driver installation on the engineering PC. Verify the communication settings in WinCC flexible match the panel interface (MPI address, baud rate).

Reinstall the PC adapter drivers and confirm the correct COM port or USB device is selected. Put the panel into transfer mode via the Start Center before initiating the download from WinCC flexible.

Panel repeatedly restarts or shows a watchdog reset message

This may indicate a corrupt project file, insufficient memory, or a hardware fault. Check the event log in the panel's Start Center for specific event IDs.

Re-transfer a known-good project to the panel. If the issue persists without a project loaded, the panel's flash memory or main board may be defective and require repair or replacement.

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