Siemens 6AV6344-2AC14-0MF7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC14-0MF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC14-0MF7 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level visualization and operator control in industrial automation environments. This unit provides a compact and robust human-machine interface solution, combining a monochrome or color display with integrated function keys and a numeric/alphanumeric keypad for direct operator interaction. It is part of the SIMATIC HMI Comfort and Mobile Panels generation and is configured and operated using Siemens WinCC flexible engineering software.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports up to 256 colors. It is equipped with MPI/PROFIBUS DP and Ethernet (TCP/IP) communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs as well as third-party controllers via configurable drivers. The panel includes 2 MB of user memory for project data and recipes, supports USB for project transfer and data backup, and operates on a 24 V DC supply. The housing meets IP65 protection rating on the front face, making it suitable for panel-mount installations in demanding environments.

The OP 177B is widely used in machine building, packaging machinery, conveyor systems, and process plant control cabinets where a compact, key-operated HMI is preferred over a pure touchscreen solution. Its dual communication interface capability makes it suitable for both legacy PROFIBUS-based installations and modern Ethernet-networked systems. The integrated function keys and membrane keypad allow reliable operation in environments where gloves are worn or touchscreen use is impractical.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
User Memory	2 MB
Communication Interface	MPI/PROFIBUS DP, Ethernet (TCP/IP), USB
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 mount
Certifications	CE, UL, cULus
Engineering Software	WinCC flexible 2008 or later

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup — the loaded project is incompatible with the panel type or firmware version.
Re-transfer the correct project using WinCC flexible. Verify that the project is compiled for the OP 177B and that firmware versions match.
Event ID: 10001: Communication connection to the configured PLC has failed or cannot be established.
Check MPI/PROFIBUS DP or Ethernet cable connections and network settings. Verify PLC address and baud rate settings match the project configuration.
Event ID: 20000: Project transfer error — data transfer from the engineering PC to the panel was interrupted or failed.
Restart the transfer in WinCC flexible. Check USB or Ethernet connection stability and ensure the panel is in transfer mode.
Event ID: 40000: Recipe data error — a recipe record could not be read or written correctly.
Check available user memory. Verify recipe configuration in the project. Clear corrupted recipe data and re-download if necessary.
Event ID: 50000: Tag read/write error — a configured PLC tag could not be accessed within the defined timeout period.
Verify PLC is online and the tag address is correct. Check communication interface settings and cable integrity.
Event ID: 60000: System memory low — available panel memory for runtime operation is critically low.
Reduce the number of active screens, logged alarms, or recipe entries. Optimize the project to reduce memory usage and re-transfer.
Event ID: 70000: Firmware update error — firmware update process was interrupted or the firmware file is incompatible.
Restart the firmware update using ProSave or WinCC flexible. Ensure the correct firmware version for the OP 177B is used and the power supply is stable during update.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC14-0MF7)?

The OP 177B is directly compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports Ethernet-based communication and can connect to third-party controllers using configurable communication drivers in WinCC flexible.

What engineering software is required to program this panel?

The OP 177B is configured using Siemens WinCC flexible 2008 or a compatible later version. Projects are compiled and transferred to the panel via USB or Ethernet connection.

What is the display type and resolution of the OP 177B?

The panel features a 5.7-inch STN LCD display with a resolution of 320 x 240 pixels (QVGA) and supports up to 256 colors.

Does the OP 177B support touchscreen input?

No, the OP 177B is a key-operated panel. It uses membrane function keys and a numeric/alphanumeric keypad for operator input, without a touchscreen layer.

What is the front panel protection rating of this unit?

The front face of the OP 177B carries an IP65 protection rating, making it suitable for panel-mount installations where dust and water spray resistance is required.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector. Check that voltage is within the specified range and that polarity is correct. Inspect the internal fuse if accessible.

Correct the supply voltage or wiring polarity. If the supply is confirmed good and the display remains blank, the panel may require internal repair or replacement of the backlight or power supply board.

Panel fails to communicate with the PLC

Verify the MPI/PROFIBUS DP or Ethernet cable is securely connected at both ends. Check the PLC address, baud rate, and network settings configured in the WinCC flexible project against the actual PLC settings.

Correct any mismatched address or baud rate settings in the project and re-transfer. Replace the communication cable if continuity testing reveals a fault. Confirm the PLC is powered and in RUN mode.

Touchscreen or keypad inputs are not responding

For key-operated panels, check whether the membrane keypad connector is seated correctly on the internal PCB. Test individual keys to determine if the fault is isolated to specific keys or all inputs.

Re-seat the keypad ribbon connector if accessible. If individual keys are unresponsive due to membrane wear, the keypad membrane assembly may need replacement. For complete input failure, inspect the main controller board.

Project transfer fails or panel does not enter transfer mode

Confirm the panel is set to transfer mode via the Start Center menu. Check the USB or Ethernet connection between the engineering PC and the panel. Verify WinCC flexible project is compiled without errors.

Restart the panel and re-enter transfer mode manually. Try an alternative transfer cable or port. Ensure the correct panel type is selected in the WinCC flexible project settings before re-attempting the transfer.

Alarm or event messages are not displaying correctly

Check the alarm configuration in the WinCC flexible project, including trigger tags, alarm classes, and display settings. Verify that the PLC tags linked to alarm triggers are being updated correctly.

Correct any misconfigured alarm tag addresses or trigger conditions in the project and re-transfer. Ensure the PLC program is writing the expected values to the alarm trigger tags.

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