Siemens 6AV6344-2AD14-0CF7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AD14-0CF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD14-0CF7 is an OP 177B operator panel belonging to the SIMATIC HMI family, designed for machine-level visualization and operator control in industrial automation environments. This unit features a monochrome STN display and is part of the Comfort/Mobile Panel generation that bridges basic text-based operation with graphical HMI functionality. It is configured and programmed using Siemens WinCC flexible software, making it compatible with the broader SIMATIC ecosystem.

The OP 177B panel is equipped with a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA), supporting 256 colors or monochrome depending on the variant. It provides MPI/PROFIBUS DP and RS-422/RS-485 interfaces for PLC connectivity, along with a USB port for project transfer and peripheral connection. The unit operates on 24 V DC supply voltage and includes a membrane keypad with function keys for operator input, offering a robust and reliable input method suited to industrial environments. Onboard flash memory supports project storage and recipe management.

The OP 177B is widely used in manufacturing, machine building, packaging, and process industries where a compact, panel-mount HMI is required for local machine control and status monitoring. Its compatibility with SIMATIC S7-200, S7-300, and S7-400 PLCs makes it a versatile choice for retrofitting existing installations or integrating into new machine designs. The rugged construction and IP65 front protection rating make it suitable for use in environments with dust and water splash exposure.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN monochrome
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, USB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 177B
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2008 or higher

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 DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI project configuration. Restart both devices if necessary.
Event ID: 10001: Timeout on the communication link to the PLC. The panel did not receive a response from the controller within the expected time window.
Verify network cabling integrity and connector seating. Check PLC is in RUN mode and not in STOP or fault state. Reduce network load or increase timeout settings in WinCC flexible project.
Event ID: 20000: Project download error. The project transfer from the engineering PC to the HMI panel was interrupted or failed.
Check USB or MPI/PROFIBUS connection between PC and panel. Ensure WinCC flexible version is compatible with the panel firmware. Retry the transfer and verify sufficient free memory on the device.
Event ID: 40000: Recipe data error. A recipe record could not be read from or written to the internal flash memory.
Check available flash memory on the panel. Verify recipe configuration in the WinCC flexible project. If the error persists, back up the project and perform a memory reset on the panel.
Event ID: 50000: System memory low. The available working memory on the HMI panel is insufficient to execute the current project.
Reduce the complexity of the HMI project, including the number of screens, variables, and active alarms. Restart the panel to clear temporary memory allocations.
Event ID: 60000: Firmware update error. The firmware update process on the panel was not completed successfully.
Retry the firmware update using ProSave or WinCC flexible. Ensure the correct firmware version for the OP 177B is used and that the power supply is stable during the update process.
Event ID: 70000: Alarm buffer overflow. The number of pending or unacknowledged alarms has exceeded the buffer capacity of the panel.
Acknowledge and clear pending alarms. Review the alarm configuration in the project to reduce the number of simultaneously active alarms or increase the alarm buffer size if supported.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 177B (6AV6344-2AD14-0CF7)?

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

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

The OP 177B is programmed using Siemens WinCC flexible 2008 or a compatible version. Projects are transferred to the panel via USB or MPI/PROFIBUS DP connection using the ProSave tool or directly from WinCC flexible.

What is the supply voltage for the 6AV6344-2AD14-0CF7?

The panel operates on a 24 V DC supply voltage. The power consumption is a maximum of 9 W under normal operating conditions.

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

The front of the OP 177B panel is rated IP65, providing protection against dust ingress and low-pressure water jets. 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 Siemens ProSave tool via the USB interface or MPI/PROFIBUS DP connection. It is important to use the correct firmware version designated for the OP 177B to avoid compatibility issues.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Restore the 24 V DC supply to within specification. If the supply is correct and the display remains blank, the backlight or internal power board may be faulty and the unit should be sent for repair or the backlight replaced.

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

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the PLC address configured in the HMI project matches the actual PLC station address. Confirm the PLC is powered and in RUN mode.

Correct any wiring faults and ensure proper bus termination. Update the HMI project in WinCC flexible to match the correct PLC address and baud rate, then re-download the project to the panel.

Touchscreen or keypad inputs are not responding

Determine whether the issue is with the membrane keypad or a specific function key. Check for physical damage to the keypad overlay. Attempt a panel restart to rule out a software hang.

If a restart resolves the issue, review the project for tasks that may be blocking the input handler. If the keypad is physically damaged, the membrane keypad assembly should be replaced by a qualified technician.

Project transfer fails during download from PC

Check the USB or MPI/PROFIBUS DP connection between the engineering PC and the panel. Verify that the panel is in transfer mode (accessible via the Start Center or loader menu). Confirm the WinCC flexible version is compatible with the panel firmware version.

Place the panel in transfer mode manually via the Start Center. Use ProSave to update firmware if a version mismatch is detected. Retry the project download with a known-good USB cable or alternative communication path.

Panel restarts unexpectedly during operation

Check the 24 V DC supply for voltage dips or instability, particularly under load. Review the alarm and event log on the panel for any recorded system events prior to the restart. Inspect the project for memory overload conditions.

Stabilize the power supply by using a dedicated 24 V DC source with adequate current capacity. Simplify the HMI project if memory usage is excessive. If restarts persist without a clear cause, the panel hardware may require inspection and repair.

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