Siemens 6AV6344-2AD14-0MG6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD14-0MG6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD14-0MG6 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 STN display and is part of the Comfort/Mobile Panel generation predecessor series, offering reliable operator control and monitoring capabilities. The OP 177B is engineered for integration into automation systems built around Siemens SIMATIC PLCs and third-party controllers.

The 6AV6344-2AD14-0MG6 features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels (QVGA), supporting up to 4 gray scales. It is equipped with a membrane keypad for operator input and supports communication via MPI, PROFIBUS DP, and RS-422/RS-485 interfaces, enabling direct connection to S7-200, S7-300, and S7-400 PLCs. The panel runs on WinCC flexible runtime and provides configurable function keys, alarm management, recipe handling, and trend display capabilities. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely deployed in manufacturing, packaging, and process automation environments where a compact, robust operator panel is required at the machine level. Its compatibility with PROFIBUS DP makes it suitable for distributed control architectures in automotive, food and beverage, and general industrial machinery applications. The panel's rugged construction and broad PLC compatibility make it a practical choice for both OEM machine builders and system integrators.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	4 gray scales
Input Voltage	24 V DC
Power Consumption	Approx. 6 W
Communication Interface	MPI, PROFIBUS DP, RS-422/RS-485
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
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	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 or has been interrupted.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI project configuration. Restart both the PLC and the HMI panel.
Event ID: 10001: Connection to PLC timed out. The HMI panel did not receive a response from the controller within the expected time window.
Verify the PLC is in RUN mode and the communication cable is intact. Check for address conflicts on the MPI or PROFIBUS network. Reduce network load if multiple devices share the bus.
Event ID: 20000: Project download error. The configuration project could not be transferred to the HMI panel successfully.
Ensure the correct transfer cable or network connection is used. Verify that the WinCC flexible project is compiled without errors before transfer. Check available memory on the panel.
Event ID: 40000: System memory low. The panel's available runtime memory is insufficient for the current project or operation.
Reduce the number of active alarms, trends, or recipe data sets in the project. Optimize the WinCC flexible project to reduce memory usage and re-download.
Event ID: 50000: Configuration error detected. The project loaded on the panel is incompatible with the current firmware version.
Update the panel firmware to match the version required by the WinCC flexible project, or recompile the project using a compatible version of WinCC flexible.
Event ID: 70000: Internal device error. A hardware fault has been detected within the HMI panel.
Perform a panel restart. If the error persists, back up the project, perform a factory reset, and reload the project. Contact Siemens technical support or arrange for hardware inspection if the fault continues.
Event ID: 110000: Tag read/write error. The HMI panel is 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 area. Check PLC program for access protection or incorrect data types.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD14-0MG6)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports connections to third-party controllers via RS-422/RS-485 using appropriate communication drivers in WinCC flexible.

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

The OP 177B is configured using Siemens WinCC flexible software. Projects are compiled in WinCC flexible and downloaded to the panel via a PC adapter, MPI cable, or PROFIBUS connection.

What is the supply voltage for the 6AV6344-2AD14-0MG6?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid operational issues.

Is the OP 177B front panel rated for washdown or dusty environments?

Yes, the front face of the OP 177B carries an IP65 protection rating, making it suitable for environments with dust and water spray. 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 ProSave tool from Siemens or via WinCC flexible. The update is transferred to the panel through the serial or MPI interface.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify the supply is within the acceptable voltage range and that the connector is fully seated.

Restore correct 24 V DC supply. If voltage is correct and display remains blank, inspect the internal fuse and replace if blown. If the fault persists, the internal power supply or display backlight may require replacement.

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

Inspect the MPI or PROFIBUS DP cable for physical damage and verify correct termination at both ends of the bus. Check that the PLC address configured in the WinCC flexible project matches the actual PLC station address.

Replace damaged cables and ensure bus terminators are correctly installed. Correct any address mismatches in the project configuration and re-download the project. Confirm the PLC is powered and in RUN mode.

Touchscreen or keypad inputs are not responding

Determine whether the issue is with all keys or specific function keys. Check if the panel is in transfer mode, which disables normal operation. Inspect the membrane keypad for physical damage or contamination.

Exit transfer mode by pressing the appropriate key combination or restarting the panel. Clean the keypad surface. If specific keys are permanently unresponsive, the membrane keypad assembly may need to be replaced.

Project download fails or transfer is interrupted

Verify the communication cable between the PC and the panel is correctly connected and the correct COM port or adapter is selected in WinCC flexible. Check that the panel is set to transfer mode before initiating the download.

Switch the panel to transfer mode via the Start Center menu. Use a known-good PC adapter cable. Ensure the WinCC flexible project compiles without errors before attempting transfer. Disable antivirus software that may block the communication port.

Panel restarts repeatedly or enters a boot loop

A corrupted project file or incompatible firmware version can cause repeated restarts. Attempt to access the Start Center during boot by pressing the appropriate key combination to prevent the project from loading automatically.

Use ProSave to perform a firmware update or restore the panel to factory defaults. Re-download a freshly compiled WinCC flexible project. If the boot loop continues after a factory reset, the internal flash memory or main board may be faulty and require hardware repair.

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