Siemens 6AV6344-2AC24-0CF6 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC24-0CF6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC24-0CF6 is an operator panel belonging to the SIMATIC OP 177B series, part of Siemens' SIMATIC HMI product line. This unit is a compact, panel-mounted operator panel designed for machine-level visualization and control tasks. It provides a monochrome or color display interface for process monitoring and operator interaction in industrial environments.

The OP 177B features a 5.7-inch STN display and supports both touch and key-based operation, combining a resistive touchscreen with configurable function keys for flexible operator input. It communicates via MPI, PROFIBUS DP, and Ethernet interfaces, enabling integration with SIMATIC S7 PLCs and other compatible controllers. The panel runs on WinCC flexible runtime software and offers sufficient onboard memory for typical machine HMI applications. It operates on a 24 V DC supply and is rated to IP65 on the front face, making it suitable for panel-door mounting in industrial enclosures.

The OP 177B is widely deployed in manufacturing, packaging, and process automation applications where a mid-range operator panel is required at the machine level. Its compatibility with the SIMATIC S7-300 and S7-400 controller families makes it a common choice for machine builders and system integrators working within the Siemens automation ecosystem. The combination of touch and key operation suits environments where operators require both graphical navigation and tactile button confirmation.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Touch Technology	Resistive touchscreen with membrane function keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45)
IP/Protection Rating	IP65 (front), IP20 (rear)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mounting
Series/Product Family	SIMATIC OP 177B
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC controller
Check MPI/PROFIBUS/Ethernet cable connections and termination resistors. Verify PLC address settings and communication parameters in WinCC flexible project.
Event ID: 10001: Connection to PLC lost or timeout occurred during runtime
Verify PLC is powered and running. Check network cable integrity and confirm correct station address and baud rate settings on both devices.
Event ID: 20000: Project download error or incompatible project version detected
Ensure WinCC flexible version matches the panel firmware version. Re-transfer the project using the correct transfer settings and verify USB or Ethernet transfer connection.
Event ID: 40000: Internal device error or system fault detected on the operator panel
Perform a panel restart. If the fault persists, check for firmware corruption and re-flash the panel firmware using the Siemens ProSave tool.
Event ID: 50000: Insufficient memory for runtime project or data logs
Reduce the project size, clear data logs, or delete unused recipes and alarm archives stored on the panel.
Event ID: 60000: Tag or variable address not accessible or invalid address configured
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Correct any mismatched or out-of-range addresses.
Event ID: 70000: Alarm buffer overflow — alarm log capacity exceeded
Acknowledge and clear pending alarms. Increase the alarm buffer size in the WinCC flexible project settings or enable automatic archiving to external storage.

Frequently Asked Questions

What PLC families are compatible with the OP 177B (6AV6344-2AC24-0CF6)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP, and can also communicate with S7 controllers over Ethernet. Third-party controllers supporting these protocols may also be integrated.

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

The OP 177B is configured using Siemens WinCC flexible software. Projects are transferred to the panel via Ethernet, USB, or MPI/PROFIBUS connection using the ProSave transfer tool or directly from WinCC flexible.

What is the supply voltage for the 6AV6344-2AC24-0CF6?

The panel requires a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current to meet the panel's maximum power consumption of approximately 12 W.

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

The front face of the OP 177B is rated to IP65, making it resistant to dust ingress and low-pressure water jets, suitable for mounting in industrial control panel doors.

Can the OP 177B operate both as a touch panel and with physical keys?

Yes, the OP 177B combines a resistive touchscreen with dedicated membrane function keys, allowing operators to use either touch input or physical key presses for navigation and control.

Troubleshooting

Display remains blank after power is applied

Measure 24 V DC at the power supply connector on the rear of the panel. Check the internal fuse and verify the power supply unit is delivering adequate current.

Replace the power supply or correct wiring if voltage is absent. If voltage is present but display remains off, the backlight or internal power board may require replacement.

Panel fails to establish communication with the PLC

Check the MPI, PROFIBUS, or Ethernet cable connections and verify the bus termination is correctly set. Confirm the station address and baud rate configured on the panel match the PLC settings.

Correct any address or baud rate mismatches in the WinCC flexible project. Replace damaged cables or connectors. Ensure bus termination resistors are enabled only at the physical ends of the network.

Touchscreen does not respond or registers incorrect touch positions

Inspect the touchscreen surface for damage, contamination, or excessive pressure points. Check whether the touchscreen calibration has been lost or corrupted.

Clean the touchscreen surface and perform a touchscreen recalibration via the panel's Start Center or Control Panel settings. If calibration fails repeatedly, the touchscreen assembly may need replacement.

Project transfer from WinCC flexible fails or is interrupted

Verify the transfer connection type (Ethernet, USB, or MPI) is correctly configured in both WinCC flexible and the panel's transfer settings. Check for firewall or antivirus software blocking the connection on the engineering PC.

Set the panel to transfer mode via the Start Center, disable firewall interference on the PC, and retry the transfer. Ensure the WinCC flexible version is compatible with the panel firmware version.

Panel repeatedly restarts or shows a system error on boot

Check for corrupted firmware or an incomplete project download. Inspect the 24 V DC supply for voltage fluctuations or insufficient current capacity.

Use the Siemens ProSave tool to restore or update the panel firmware. Ensure the power supply is stable and rated for the panel's load. If the issue persists after firmware restoration, the panel may require hardware repair or replacement.

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