Siemens 6AV6344-2AD34-0MG7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD34-0MG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD34-0MG7 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level human-machine interface applications. This unit provides a monochrome or color graphical display with touch and key-based operation, serving as a compact yet capable panel for process visualization and control. It is part of Siemens' mid-range HMI portfolio, bridging the gap between basic text panels and full-featured multi-touch displays.

The OP 177B features a 5.7-inch STN display and supports both MPI/PROFIBUS DP and Ethernet communication interfaces, enabling integration into a wide range of Siemens and third-party control architectures. It is configured using WinCC flexible engineering software and supports recipe management, trend displays, alarm logging, and user administration functions. The panel operates on 24 V DC and is rated to IP65 on the front face, making it suitable for installation in control cabinet doors exposed to industrial environments.

The OP 177B is widely deployed in manufacturing, packaging, food and beverage, and general machine automation applications where a reliable and compact 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 system upgrades. The combination of key-based and optional touch operation allows use in environments where gloved operation or precise input is necessary.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 px (QVGA)
Touch Technology	Resistive touch screen with function keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 10 W
Communication Interface	MPI/PROFIBUS DP, RS-422/485, Ethernet (RJ45)
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
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

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 or Ethernet cable connections and termination resistors. Verify PLC address settings and communication parameters in WinCC flexible match the hardware configuration.
Event ID: 10001: Timeout error on the communication channel. The PLC did not respond within the expected time frame.
Check network load and cable integrity. Increase the communication timeout value in the HMI project settings if the network is heavily loaded.
Event ID: 20000: Tag read error. The HMI was unable to read a configured tag from the PLC.
Verify that the tag address in WinCC flexible corresponds to an existing and accessible address in the PLC program. Check PLC is in RUN mode.
Event ID: 20001: Tag write error. The HMI was unable to write a value to a configured PLC tag.
Confirm the target PLC data area is not write-protected. Check that the tag address and data type are correctly configured in the HMI project.
Event ID: 40000: Project download error. A mismatch exists between the HMI runtime and the downloaded project version.
Re-download the project from WinCC flexible ensuring the correct HMI device type and firmware version are selected. Perform a full project transfer.
Event ID: 50000: System memory low. The available runtime memory on the panel is insufficient for the current project.
Reduce the number of active screens, limit log buffer sizes, or optimize the project in WinCC flexible to reduce memory usage.
Event ID: 60000: Firmware update failed or firmware version mismatch detected on startup.
Perform a firmware update using the ProSave tool or WinCC flexible, ensuring the firmware version is compatible with the installed runtime version.
Event ID: 70000: Recipe data error. A recipe record could not be read from or written to the internal storage.
Check available internal memory. Re-transfer recipe data from the engineering PC. If the error persists, perform a memory reset and re-download the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD34-0MG7)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, S7-400, and WinAC controllers via MPI/PROFIBUS DP or Ethernet. It can also communicate with third-party controllers via the RS-422/485 serial interface using standard protocols.

What software is used to configure and program the OP 177B?

The OP 177B is configured using Siemens WinCC flexible (2004 SP1 or higher). Projects are transferred to the panel via Ethernet, MPI, or USB using the ProSave utility or directly from WinCC flexible.

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, making it suitable for panel door mounting in industrial environments.

Does the OP 177B support both touch and key-based operation?

Yes, the OP 177B features a resistive touch screen combined with physical function keys and system keys, allowing operation with or without direct screen touch, including use with gloves.

What communication interfaces are available on the 6AV6344-2AD34-0MG7?

This unit provides an MPI/PROFIBUS DP interface (RS-485 based), an RS-422/485 serial port, and a 10/100 Mbit/s Ethernet port (RJ45) for PLC communication and project transfer.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Verify polarity is correct and voltage is within the 20.4–28.8 V DC acceptable range.

Correct the supply voltage or wiring if out of range. If voltage is correct and display remains blank, the internal power supply board or backlight inverter may be faulty and requires replacement or professional repair.

HMI shows 'No connection to PLC' or communication alarm on startup

Check the MPI/PROFIBUS or Ethernet cable between the HMI and PLC. Verify the bus address configured in the HMI project matches the physical address set on the PLC and that termination resistors are correctly placed at bus ends.

Replace or reseat the communication cable. Correct address and baud rate settings in WinCC flexible and re-download the project. Ensure only the two physical ends of the PROFIBUS segment have termination resistors enabled.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touch screen via the panel's Control Panel menu accessible during startup. Check for physical damage, contamination, or excessive pressure marks on the screen surface.

Perform a touch screen recalibration from the SIMATIC HMI Control Panel. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touch foil assembly may need replacement.

Project transfer fails or WinCC flexible cannot connect to the panel

Verify the transfer mode is enabled on the HMI panel (accessible via Control Panel > Transfer). Check that the IP address or MPI address in WinCC flexible matches the panel configuration and that no firewall is blocking the connection.

Enable transfer mode on the panel manually or configure automatic transfer mode in the project settings. Confirm network settings and use the ProSave tool to test connectivity independently of WinCC flexible.

Panel repeatedly restarts or displays a runtime error on boot

A corrupted project file or incompatible firmware version is the most common cause. Connect to the panel using ProSave and check the installed firmware version against the WinCC flexible project requirements.

Use ProSave to update the panel firmware to the version required by the project. If the issue persists, perform a factory reset via the panel's loader menu and re-transfer the project and firmware from the engineering PC.

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