Siemens 6AV6344-2AC24-0MF7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC24-0MF7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC24-0MF7 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome STN display with touch and key-based operation, enabling operators to monitor and control industrial processes directly at the machine. It is part of Siemens' established SIMATIC HMI portfolio, offering a compact and robust panel solution for demanding industrial environments.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA) and supports 256 colors in its color variants, though this specific unit provides monochrome display output. It is equipped with MPI/PROFIBUS DP and RS-422/RS-485 interfaces for communication with SIMATIC S7 PLCs and other compatible controllers. The panel runs on WinCC flexible runtime software, supports recipe management, alarm logging, and trend display functions, and includes 512 KB of user memory for project data. The unit operates from a 24 V DC supply and conforms to IP65 protection on the front face.

The OP 177B is widely deployed in machine building, automotive manufacturing, food and beverage processing, and packaging industries where a compact, reliable operator interface is required at the machine level. Its compatibility with SIMATIC S7-200, S7-300, and S7-400 PLCs makes it a practical choice for integration into existing Siemens automation architectures. The panel's rugged construction and sealed front face make it suitable for installation in control cabinet doors exposed to dust and moisture.

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. 8 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485
User Memory	512 KB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B
Configuration Software	WinCC flexible 2005 or higher

Common Error Codes and System Events

Event ID: 010000: Configuration error detected during startup. The project data loaded on the panel is invalid or incompatible with the current runtime version.
Reload the project using WinCC flexible and ensure the runtime version matches the panel firmware version.
Event ID: 020000: Communication error with the configured PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI/PROFIBUS DP cable connections, verify the configured PLC address and baud rate in the project settings, and confirm the PLC is powered and running.
Event ID: 040000: Tag read error. The panel is unable to read a configured tag from the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address changes.
Event ID: 050000: Tag write error. A write operation to a PLC tag has failed.
Check that the target PLC address is not write-protected and that the data type configured in the HMI project matches the PLC variable type.
Event ID: 070000: Recipe data error. A recipe transfer to or from the PLC has failed or the recipe data is inconsistent.
Verify recipe configuration in WinCC flexible, check that recipe tag addresses are valid, and retry the transfer operation.
Event ID: 110000: Backup/restore error. A data backup or restore operation on the panel has failed.
Check the storage medium (memory card) for errors or insufficient space. Reformat the card if necessary and retry the backup or restore procedure.
Event ID: 140000: Printer communication error. The panel cannot communicate with the configured printer.
Check printer cable connections and verify the printer configuration settings in the WinCC flexible project match the connected printer.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6344-2AC24-0MF7)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S5 controllers and 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 this panel?

The OP 177B requires Siemens WinCC flexible 2005 or a later version for project creation and transfer. Projects are transferred to the panel via MPI, PROFIBUS DP, or a PC/PPI cable connection.

What is the supply voltage for the 6AV6344-2AC24-0MF7?

The panel operates on a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel consumes up to 8 W under normal operating conditions.

What is the front panel protection rating of this unit?

The front face of the OP 177B is rated IP65, making it resistant to dust ingress and water jets. The rear of the unit is rated IP20 and should be protected within a suitable enclosure.

Can the OP 177B be used with PROFIBUS DP networks?

Yes, the OP 177B supports PROFIBUS DP communication, allowing it to be integrated into existing PROFIBUS networks alongside other Siemens automation components. The baud rate and station address are configurable within the WinCC flexible project.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check for correct polarity. Inspect the internal fuse if accessible.

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

Panel displays 'No connection to PLC' or communication fault on startup

Check the MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Verify the bus termination resistors are correctly installed at both ends of the network segment.

Correct any loose or damaged cable connections. Confirm the MPI/PROFIBUS address and baud rate configured in the WinCC flexible project match the PLC settings. Replace the communication cable if damaged.

Touchscreen or function keys do not respond to input

Attempt to operate the panel using both the touchscreen and the physical function keys to isolate the fault. Check if the panel is in a locked or password-protected state.

Perform a panel restart by cycling the 24 V DC power supply. If the touchscreen remains unresponsive, recalibrate it via the panel's Start Center or Service menu. If keys are physically damaged, the front panel assembly may require replacement.

Project transfer from WinCC flexible fails or times out

Verify the communication cable between the PC and the panel is correctly connected and the correct COM port or USB-to-serial adapter is selected in WinCC flexible. Check that the panel is in Transfer mode.

Set the panel to Transfer mode via the Start Center menu. Ensure the correct transfer channel (MPI, PROFIBUS, or serial) is selected in WinCC flexible. Try a different cable or adapter if the transfer continues to fail.

Panel reboots repeatedly or freezes during operation

Check the 24 V DC supply for voltage dips or instability under load. Review the system event log on the panel for recurring event IDs that may indicate a software or configuration fault.

Stabilize the power supply by using a dedicated 24 V DC source with adequate current capacity. If the issue persists, reload the WinCC flexible project to the panel. A factory reset via the Service menu may be required if the panel firmware is corrupted.

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