Siemens 6AV6344-2AC14-0CG7 OP 177B

€ 1.995,00

SKU: 6AV6344-2AC14-0CG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AC14-0CG7 is an OP 177B operator panel belonging to the SIMATIC HMI family of human-machine interface devices. This unit provides a monochrome graphical display and is designed for machine-level operator control and monitoring tasks. It is part of Siemens' mid-range HMI portfolio, offering a balance of functionality and compact form factor for industrial environments.

The OP 177B features a 5.7-inch STN monochrome display with a resolution of 320 x 240 pixels and supports touch and key-based operation. It includes interfaces for MPI/PROFIBUS DP and RS-422/RS-485 communication, enabling integration with SIMATIC S7 and S5 PLCs as well as third-party controllers. The panel is configured using WinCC flexible engineering software and supports recipe management, alarm logging, and trend display functions. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely deployed in machine building, packaging, and manufacturing automation applications where a compact, robust operator interface is required. Its compatibility with PROFIBUS DP makes it suitable for distributed control architectures in process and discrete manufacturing environments. The panel's rugged construction and wide operating temperature range make it appropriate for installation in industrial control cabinets and on machine fronts.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome
Display Resolution	320 x 240 pixels
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485
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
Engineering Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC or controller.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify the configured station address matches the physical device address. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during runtime.
Inspect the communication cable for damage. Verify bus termination and cable shielding. Check PLC status and restart communication if necessary.
Event ID: 20000: Project download error — the project could not be transferred to the panel.
Verify the transfer cable connection and PC communication settings. Ensure WinCC flexible project is compatible with the OP 177B firmware version. Retry the transfer.
Event ID: 40000: System memory low — available memory on the HMI device is insufficient.
Delete unused projects or data records from the panel. Optimize the project size in WinCC flexible and reduce the number of stored alarms or recipes.
Event ID: 50000: Firmware update error — firmware could not be loaded onto the device.
Restart the panel in transfer mode and retry the firmware update using ProSave or WinCC flexible. Ensure the correct firmware version is used for the 6AV6344-2AC14-0CG7.
Event ID: 70010: Recipe data error — a recipe record could not be read or written correctly.
Check the recipe configuration in WinCC flexible. Verify that the PLC data block addresses referenced by the recipe are correct and accessible.
Event ID: 60000: Tag update error — one or more process tags could not be updated within the configured cycle time.
Increase the tag update cycle time in the project configuration. Reduce the number of simultaneously active tags. Check communication bus load.

Frequently Asked Questions

What PLC systems is the OP 177B 6AV6344-2AC14-0CG7 compatible with?

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 S5 PLCs and a range of third-party controllers via the RS-422/RS-485 interface.

What software is required to configure and program this HMI panel?

The OP 177B is configured using Siemens WinCC flexible 2005 or later versions. ProSave can be used for firmware updates and backup/restore operations independently of WinCC flexible.

What is the supply voltage for the 6AV6344-2AC14-0CG7?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the permissible tolerance range as specified in the device manual.

Is the OP 177B suitable for outdoor installation?

The OP 177B has an IP65 rating on the front face, providing protection against dust and water jets, but it is not rated for direct outdoor exposure to sunlight or extreme weather. It is intended for installation in industrial enclosures or on machine fronts in indoor environments.

Can the OP 177B display process trends and alarms?

Yes, the OP 177B supports trend display, alarm logging, and alarm management functions. These features are configured within the WinCC flexible engineering environment.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector. Verify the supply is within the specified tolerance. Inspect the internal fuse if accessible.

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

HMI panel shows 'No connection to PLC' message at runtime

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check that bus termination resistors are correctly placed at both ends of the bus segment. Confirm the station address configured in the project matches the physical address set on the panel.

Correct any wiring faults, replace damaged cables, and ensure proper bus termination. Adjust the station address in WinCC flexible if there is a mismatch, then reload the project to the panel.

Touchscreen or function keys not responding

Check whether the panel is in transfer mode, which disables normal runtime operation. Inspect the keypad membrane for physical damage. Attempt a panel restart.

Exit transfer mode by pressing the appropriate key combination or cycling power. If keys remain unresponsive after restart, the keypad membrane or touch controller may be defective and require hardware replacement.

Project transfer from PC to panel fails

Verify the transfer cable (MPI or PC/PPI) is correctly connected and the PC communication port settings match the panel transfer settings. Confirm the panel is set to transfer mode. Check that the WinCC flexible project version is compatible with the panel firmware.

Set the panel to transfer mode via the Start Center menu. Update the panel firmware using ProSave if there is a version mismatch. Use a known-good transfer cable and verify COM port or USB adapter driver installation on the PC.

Panel repeatedly restarts or crashes during operation

Check for unstable 24 V DC supply voltage, particularly voltage dips caused by other loads on the same supply. Review the alarm buffer for system event codes that may indicate the cause of the restart.

Provide a dedicated, stable 24 V DC power supply to the HMI panel. If restarts persist with a stable supply, back up the project and perform a factory reset, then reload the project. If the issue continues, the panel hardware may require servicing.

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