Siemens 6AV6344-2AC34-0CG7 OP177B

€ 1.995,00

SKU: 6AV6344-2AC34-0CG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC34-0CG7 is an OP177B operator panel belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome display with keypad-based operation, enabling operators to monitor and control industrial processes without requiring a touchscreen interface. As part of the SIMATIC HMI comfort and basic panel lineage, it is engineered for integration with Siemens SIMATIC S7 and other compatible PLC families.

The OP177B features a 5.7-inch STN monochrome display and supports communication via MPI, PROFIBUS DP, and Ethernet interfaces, allowing flexible integration into existing automation networks. It runs the WinCC flexible runtime environment and offers onboard flash memory for project storage, supporting a substantial number of tags, screens, and alarm messages. The panel operates on 24 V DC supply and is rated to IP65 at the front face, providing protection against dust and water ingress in demanding industrial environments.

The OP177B is widely deployed in manufacturing, automotive, food and beverage, and process industries where robust operator control stations are required at the machine level. Its keypad-based design makes it suitable for environments where touchscreen operation is impractical due to gloves, contamination, or vibration. The panel is commonly mounted in control cabinet doors or operator consoles and is used to visualize process data, manage alarms, and configure machine parameters.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45)
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 OP177B
Certifications	CE, UL, cULus
Control Type	Keypad (membrane keys)

Common Error Codes & System Events

Event ID: 1000: Communication error between the HMI panel and the connected PLC or controller.
Check MPI/PROFIBUS/Ethernet cable connections and verify the configured communication parameters (station address, baud rate) match the PLC settings.
Event ID: 10000: Project download failed or project data is corrupted on the panel.
Re-download the WinCC flexible project to the panel via ProSave or WinCC flexible. Ensure the project version is compatible with the panel firmware.
Event ID: 20000: Internal flash memory error or insufficient memory for project storage.
Delete unused projects or data from the panel memory. If the error persists, perform a factory reset and re-download the project.
Event ID: 40000: Firmware update error or firmware version mismatch detected.
Use ProSave to update the panel firmware to the correct version compatible with the WinCC flexible project. Ensure stable power supply during the update process.
Event ID: 2000: Tag or variable connection lost; the HMI cannot read or write the configured PLC tag.
Verify the PLC program contains the configured tag addresses. Check for PLC faults or program stops that may prevent communication.
Event ID: 50000: System startup error; the panel fails to boot correctly into the runtime environment.
Perform a panel reset by holding the appropriate key combination during startup. If unsuccessful, use ProSave to restore the operating system and re-download the project.
Event ID: 30000: Recipe data error; recipe records cannot be read from or written to the panel memory.
Check recipe configuration in WinCC flexible for consistency. Clear recipe data on the panel and re-transfer recipe records from the engineering station.

Frequently Asked Questions

What communication interfaces does the OP177B (6AV6344-2AC34-0CG7) support?

The OP177B supports MPI, PROFIBUS DP, and Ethernet (RJ45) communication interfaces, allowing connection to SIMATIC S7-200, S7-300, S7-400, and other compatible controllers.

What software is used to configure and program this panel?

The OP177B is configured using Siemens WinCC flexible engineering software. Projects are transferred to the panel via Ethernet, MPI, or USB using the ProSave tool.

What is the supply voltage for the 6AV6344-2AC34-0CG7?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to prevent damage or malfunction.

Is the OP177B compatible with SIMATIC S7-1200 or S7-1500 PLCs?

The OP177B is primarily designed for use with S7-200, S7-300, and S7-400 PLCs via WinCC flexible. Compatibility with S7-1200 and S7-1500 is limited; TIA Portal-based panels are recommended for those controllers.

What is the front panel protection rating of the 6AV6344-2AC34-0CG7?

The front face of the OP177B is rated IP65, providing full protection against dust and protection against low-pressure water jets, making it suitable for industrial environments.

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 for blown internal fuses or incorrect polarity on the supply connection.

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

Panel fails to communicate with the PLC

Verify the communication cable type and wiring (MPI, PROFIBUS, or Ethernet). Check that the station address and baud rate configured in WinCC flexible match the PLC settings exactly.

Correct any address or baud rate mismatches in the WinCC flexible project and re-download. Replace the communication cable if continuity testing reveals a fault.

Panel continuously reboots or shows a loader screen on startup

This typically indicates a corrupted operating system or project file on the panel flash memory. Attempt to access the panel via ProSave during the boot sequence.

Use ProSave to perform an operating system update (OS update) to restore the panel firmware, then re-download the WinCC flexible project.

Keypad buttons are unresponsive or intermittently register inputs

Inspect the membrane keypad for physical damage, contamination, or delamination. Check the internal ribbon cable connection between the keypad membrane and the main board.

Clean the keypad surface. If the ribbon cable is loose or damaged, reseat or replace it. In cases of severe membrane damage, replace the keypad membrane assembly.

Alarm messages are not displayed or alarms are missing

Check the alarm configuration in the WinCC flexible project to ensure alarm tags are correctly linked to PLC addresses. Verify the PLC program is setting the correct alarm bits.

Correct the alarm tag addresses in the WinCC flexible project and re-download. Confirm the PLC logic is functioning correctly and writing to the expected memory addresses.

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