Siemens 6AV6344-2AD04-0MF7 OP 177B

€ 2.495,00

SKU: 6AV6344-2AD04-0MF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD04-0MF7 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level human-machine interface applications. This unit provides a compact, panel-mounted display solution for visualizing process data, alarms, and control functions in industrial environments. It is part of the SIMATIC HMI Basic Panels generation and is configured and operated using WinCC flexible or TIA Portal engineering software.

The OP 177B features a 5.7-inch STN color or monochrome display with a resolution of 320 x 240 pixels (QVGA), combined with a membrane keypad for operator input. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel includes 512 KB user memory for project data, supports recipe management, alarm logging, and trend displays, and operates on a 24 V DC supply. The robust housing meets IP65 protection rating on the front face, making it suitable for panel door mounting in industrial enclosures.

The OP 177B is widely deployed in manufacturing, process automation, and machine building applications where a reliable, mid-range operator interface is required. It is commonly found on packaging machinery, conveyor systems, injection molding machines, and general-purpose industrial equipment. Its compatibility with the broad SIMATIC S7 PLC portfolio and support for PROFIBUS DP makes it a practical choice for integration into existing Siemens automation architectures.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color
Input Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI, PROFIBUS DP, RS 422/485
User Memory	512 KB
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: Configuration error detected during startup; project data may be corrupted or incompatible with the panel firmware version.
Re-transfer the project using WinCC flexible or TIA Portal. Ensure the firmware version on the panel matches the engineering software version used to compile the project.
Event ID: 20000: Communication error on MPI or PROFIBUS DP interface; the panel cannot establish a connection to the configured PLC.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the bus address settings on both the panel and the PLC. Confirm the PLC is powered and in RUN mode.
Event ID: 40000: Tag read/write error; the panel is unable to read from or write to a configured PLC tag.
Verify the PLC tag addresses configured in the project match the actual PLC program. Check communication link status and ensure the PLC program is running correctly.
Event ID: 50000: Alarm buffer overflow; the number of pending alarms has exceeded the panel buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in the project to reduce unnecessary alarm triggers or increase the alarm buffer size if supported.
Event ID: 60000: Recipe data error; a recipe transfer to or from the PLC has failed or the recipe data is inconsistent.
Check recipe configuration in the project. Verify that the recipe tag addresses are correctly mapped to the PLC and that the PLC is in a state that allows data transfer.
Event ID: 70000: System memory low warning; available memory for runtime operation is critically low.
Reduce the project size by removing unused screens, tags, or archived data. Re-transfer the optimized project to the panel.
Event ID: 80000: Firmware update error; a firmware update process was interrupted or failed to complete.
Repeat the firmware update procedure using the ProSave tool or via the panel's transfer settings. Ensure stable power supply during the update process.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AD04-0MF7)?

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 PLCs when configured appropriately in TIA Portal.

What engineering software is required to program the OP 177B?

The OP 177B can be configured using Siemens WinCC flexible 2008 or later, or via the TIA Portal with the appropriate HMI software package. Projects are transferred to the panel via MPI, PROFIBUS DP, or USB.

What is the display type and resolution of the 6AV6344-2AD04-0MF7?

This panel features a 5.7-inch STN color display with a resolution of 320 x 240 pixels (QVGA). The display is combined with a membrane keypad for operator input.

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

The front face of the OP 177B meets IP65 protection rating, making it resistant to dust ingress and low-pressure water jets, suitable for panel door mounting in industrial environments.

What supply voltage does the OP 177B require?

The OP 177B operates on a 24 V DC supply voltage. Ensure the power supply is stable and within the specified tolerance range to prevent communication or display errors.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the power connector. Measure voltage at the panel terminals to confirm supply is within tolerance. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is stable and correctly connected. If voltage is confirmed correct but the display remains blank, the internal power supply board or backlight may be faulty and the unit may require repair or replacement.

Panel fails to communicate with the PLC via PROFIBUS DP

Verify the PROFIBUS cable is correctly connected and terminated at both ends. Check the bus address configured on the panel matches the project configuration. Use a PROFIBUS diagnostic tool to check bus integrity.

Correct any wiring faults, ensure termination resistors are installed only at the physical ends of the bus, and confirm the panel and PLC bus addresses do not conflict. Re-transfer the project if address settings were changed.

Touchscreen or keypad inputs are not responding correctly

Check whether the membrane keypad shows physical damage or contamination. For touch-related issues, verify the touch calibration settings in the panel's system menu.

Clean the keypad surface and check for physical damage to the membrane. Recalibrate the touch input via the panel's system settings menu. If the keypad remains unresponsive, the membrane keypad assembly may need replacement.

Project transfer fails when attempting to download from engineering PC

Verify the MPI or PROFIBUS DP cable connection between the PC adapter and the panel. Confirm the transfer settings on the panel are set to allow download. Check that the correct COM port or USB adapter is selected in the engineering software.

Set the panel to transfer mode via the Start Center menu. Ensure the PC adapter (e.g., PC Adapter USB A2) is correctly installed and the correct interface is selected in WinCC flexible or TIA Portal. Retry the transfer.

Alarms are not being displayed or acknowledged on the panel

Check the alarm configuration in the project to confirm alarm tags are correctly mapped to PLC addresses. Verify the PLC is setting the alarm bits as expected by monitoring the PLC program online.

Correct any tag address mismatches in the project configuration. Ensure the PLC program logic is correctly triggering alarm bits. Re-transfer the updated project to the panel and test alarm behavior.

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