Siemens 6AV6344-2AD04-0MG7 OP 177B

€ 2.495,00

SKU: 6AV6344-2AD04-0MG7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6344-2AD04-0MG7 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 LCD display and is part of the Comfort/Advanced panel generation that bridges basic text-based operation with graphical display capabilities. It is configured for use with Siemens SIMATIC controllers and is programmed using WinCC flexible engineering software.

The OP 177B 6AV6344-2AD04-0MG7 provides a 5.7-inch monochrome display with a resolution of 320 x 240 pixels and includes a membrane keypad with function keys for operator input. It supports MPI and PROFIBUS DP communication interfaces for direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs, as well as third-party controllers via configurable drivers. The panel offers 512 KB user memory for project data, supports alarm logging, recipe management, and trend display functions, and operates on a 24 V DC supply.

The OP 177B is widely deployed in machine building, packaging machinery, conveyor systems, and process plant control panels where a compact, robust operator interface is required. Its membrane keypad design makes it suitable for environments with dust and moisture exposure, and its PROFIBUS DP connectivity allows integration into distributed automation architectures. The panel is commonly found in applications where cost-effective, reliable HMI functionality is needed without the requirement for a full touchscreen interface.

Technical Specifications

Display Size	5.7 inch
Display Type	Monochrome STN LCD
Display Resolution	320 x 240 pixels
Input Type	Membrane keypad with function keys
Input/Operating Voltage	24 V DC
Power Consumption	Max. 8 W
Communication Interface	MPI, PROFIBUS DP
User Memory	512 KB
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cULus
Engineering Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

Event ID: 10000: Connection to the PLC could not be established or was interrupted during operation.
Check MPI or PROFIBUS DP cable connections, verify PLC address settings, and confirm the PLC is powered and in RUN mode.
Event ID: 10001: Communication timeout between the HMI panel and the configured controller.
Verify network cable integrity, check baud rate settings on both the panel and PLC, and ensure no address conflicts exist on the bus.
Event ID: 20000: Project download failed or project data is corrupted.
Re-download the project from WinCC flexible, check USB or serial transfer cable, and verify sufficient user memory is available.
Event ID: 40000: Recipe data error — recipe record could not be read or written.
Check recipe configuration in WinCC flexible, verify memory availability, and re-download the project if recipe structure has changed.
Event ID: 50000: System startup error — panel failed to load the runtime project on boot.
Perform a panel reset, re-download the project, and check for corrupted project files in WinCC flexible.
Event ID: 60000: Alarm buffer overflow — the number of pending alarms exceeds the configured buffer size.
Acknowledge and clear active alarms, increase the alarm buffer size in the WinCC flexible project configuration, and re-download.
Event ID: 70000: Internal device error or hardware fault detected during self-test.
Perform a factory reset of the panel. If the fault persists, the unit may require repair or replacement of internal components.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B 6AV6344-2AD04-0MG7?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. Third-party controllers can also be connected using available communication drivers configured in WinCC flexible.

What software is required to program the OP 177B?

The OP 177B is programmed using Siemens WinCC flexible 2005 or a later version. Projects are transferred to the panel via MPI, PROFIBUS DP, or a serial PC/PPI cable.

What is the display type on this operator panel?

The 6AV6344-2AD04-0MG7 features a 5.7-inch monochrome STN LCD with a resolution of 320 x 240 pixels. It does not have a touchscreen; operator input is via the integrated membrane keypad.

What is the supply voltage for the OP 177B?

The panel operates on a 24 V DC supply voltage. Ensure a stable, regulated 24 V DC power source is used to avoid operational issues.

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

The front face of the OP 177B achieves IP65 protection, making it resistant to dust ingress and low-pressure water jets, suitable for typical industrial panel door mounting.

Troubleshooting

Display remains blank after power on

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 providing stable voltage.

Replace the 24 V DC power supply if voltage is absent or unstable. If voltage is correct but display remains blank, the internal power supply board or backlight may require replacement.

Panel displays 'No connection to PLC' message

Check the MPI or PROFIBUS DP cable between the panel and the PLC. Verify the bus address configured on the panel matches the project settings and that no address conflicts exist.

Replace or reseat the communication cable, correct the bus address in the panel startup settings, and confirm the PLC is powered and in RUN mode. Re-download the project if settings were changed.

Panel freezes or becomes unresponsive during operation

Determine whether the freeze is reproducible under specific conditions such as alarm bursts or recipe operations. Check available user memory and project complexity.

Perform a panel reset by cycling power. If the issue recurs, optimize the WinCC flexible project to reduce polling cycles and alarm frequency, then re-download the project.

Project download fails from WinCC flexible

Verify the PC-to-panel connection cable is functional and the correct communication port and transfer settings are selected in WinCC flexible. Check that the panel is in transfer mode.

Place the panel in transfer mode via the Start Center menu, select the correct interface in WinCC flexible, and retry the download. Replace the transfer cable if communication errors persist.

Function keys do not respond to presses

Inspect the membrane keypad for physical damage, contamination, or deformation. Verify that the key functions are correctly configured in the WinCC flexible project.

Clean the keypad surface and check for mechanical damage. If individual keys are non-functional due to membrane wear, the keypad membrane assembly requires replacement.

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