Siemens 6AV6344-2AD34-0MF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD34-0MF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD34-0MF6 is an operator panel belonging to the SIMATIC HMI OP 177B series, designed for machine-level human-machine interface applications. This unit is part of Siemens' SIMATIC HMI product line and provides a compact, panel-mounted interface for process visualization and control. The OP 177B offers a combination of touch and key-based operation, making it suitable for demanding industrial environments.

The 6AV6344-2AD34-0MF6 features a 5.7-inch STN display with 256-color support and a resolution of 320 x 240 pixels (QVGA). It supports communication via PROFIBUS DP and MPI interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel includes 14 function keys with LED indicators, a numeric keypad, and is configured using WinCC flexible engineering software. Onboard memory supports project storage and recipe management.

The OP 177B is widely deployed in manufacturing, process automation, and machine tool industries where a reliable, mid-range operator interface is required. Its compact form factor and dual communication capability make it suitable for retrofitting existing PROFIBUS-based installations as well as new machine builds. The panel is commonly found on packaging machinery, conveyor systems, and general-purpose industrial machines requiring local operator control and status visualization.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color LCD
Display Colors	256 colors
Touch Technology	Touch screen with membrane keypad
Function Keys	14 function keys with LEDs
Input/Operating Voltage	24 V DC
Power Consumption	Max. 8 W
Communication Interface	PROFIBUS DP, MPI
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
Engineering Software	WinCC flexible 2005 or higher
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 configured connection cannot be established.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect cable integrity and connector seating. Check for electromagnetic interference sources near the communication cable. Verify bus termination at both ends of the PROFIBUS segment.
Event ID: 20000: Project download error. Transfer of the project from the engineering PC to the HMI panel failed.
Verify the transfer cable is correctly connected. Ensure the panel is in Transfer mode before initiating download. Check that the WinCC flexible project version is compatible with the panel firmware.
Event ID: 40000: System memory low. Available memory on the HMI device is insufficient for the current project.
Reduce the project size by removing unused screens, graphics, or recipes. Perform a memory cleanup and re-download the project.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or failed.
Restart the firmware update procedure using the correct firmware version for the OP 177B. Ensure stable power supply during the update process.
Event ID: 60000: Internal device error. A hardware fault has been detected within the HMI panel.
Perform a power cycle. If the error persists, note the exact event ID sub-code and contact Siemens technical support or arrange for unit repair and inspection.
Event ID: 70000: Tag read/write error. The HMI was unable to read from or write to a configured PLC tag.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address conflicts.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD34-0MF6)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-1200 and S7-1500 PLCs in some configurations using appropriate drivers in WinCC flexible.

What engineering software is required to program this HMI panel?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. The project is transferred to the panel via a PC adapter cable connected to the MPI/PROFIBUS port.

What is the supply voltage for the 6AV6344-2AD34-0MF6?

The panel operates on 24 V DC. The supply must be within the specified tolerance range, typically 19.2 V DC to 28.8 V DC.

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 when correctly installed in a panel cutout.

Can the OP 177B display be used as a touch-only interface?

The OP 177B combines a resistive touch screen with physical function keys and a numeric keypad. Both input methods are available simultaneously and can be used depending on the application design.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the supply is within the 19.2 V to 28.8 V DC range. Inspect the internal fuse if accessible.

Restore correct supply voltage. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight may have failed and the unit should be sent for repair.

HMI panel shows 'No connection to PLC' or communication error on startup

Verify the PROFIBUS or MPI cable is correctly seated at both the HMI and PLC ends. Check that bus termination resistors are active at both ends of the segment. Confirm the PLC station address in the HMI project matches the physical PLC setting.

Correct any address mismatches in the WinCC flexible project and re-download. Replace damaged cables or connectors. Ensure only the two physical endpoints of the PROFIBUS segment have termination enabled.

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. Verify that the touch controller is not reporting errors in the system event log.

Clean the touch surface with a soft, dry cloth. Perform a recalibration procedure. If inaccuracy persists after recalibration, the resistive touch overlay may be worn or damaged and requires replacement.

Project download fails or transfer is not initiated

Confirm the panel is set to Transfer mode (accessible via the Start Center or by holding the appropriate key combination during boot). Check the PC adapter cable connection and driver installation on the engineering PC.

Switch the panel to Transfer mode before starting the download in WinCC flexible. Reinstall the PC adapter USB driver if the COM port is not recognized. Ensure the correct interface (MPI/PROFIBUS) and baud rate are selected in the transfer settings.

Function key LEDs do not illuminate

Check the WinCC flexible project configuration to confirm LED output tags are correctly mapped to PLC bits. Verify the PLC program is writing the expected values to the mapped tags.

Correct the tag mapping in the WinCC flexible project and re-download. If LEDs fail to illuminate despite correct configuration and confirmed PLC output, the keypad membrane assembly may be faulty and require replacement.

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