Siemens 6AV6355-1AA47-7BD3 OP 77B

€ 1.373,60

SKU: 6AV6355-1AA47-7BD3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BD3 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a text-based display and membrane keypad for process monitoring and control. It is part of the SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG as a robust, industrial-grade operator interface device.

The OP 77B features a monochrome STN LCD display capable of showing multiple lines of text and simple graphics, supported by a membrane keypad with function keys for direct operator interaction. It communicates via MPI and PROFIBUS DP interfaces, enabling seamless integration with Siemens S7-200, S7-300, and S7-400 PLCs. The unit operates on a 24 V DC supply and is configured using Siemens WinCC flexible software, supporting tag-based data exchange, alarm management, and recipe handling within its onboard memory.

The OP 77B is widely used in manufacturing automation, packaging machinery, conveyor systems, and process plants where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor and panel-mount design make it suitable for integration into control cabinets and machine enclosures. The robust membrane keypad and industrial-rated housing ensure reliable operation in demanding factory floor environments.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 lines of text
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
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 mount
Power Consumption	Max. 3.6 W
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC controller.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 10001: Connection to the configured PLC has been interrupted or lost during operation.
Inspect communication cables for damage. Confirm PLC is powered and in RUN mode. Check bus address and baud rate settings.
Event ID: 20000: Project download error — the project could not be transferred to the panel.
Verify the PC-to-panel connection cable is functional. Ensure WinCC flexible project is compiled without errors before transfer.
Event ID: 40000: System memory low — available memory on the device is insufficient for the loaded project.
Reduce the number of tags, alarms, or recipe entries in the project. Reload the project after optimization.
Event ID: 50000: Configuration error detected — the loaded project is incompatible with the panel firmware version.
Update the panel firmware to match the WinCC flexible project version, or recompile the project targeting the correct panel firmware.
Event ID: 70000: Alarm buffer overflow — the number of pending alarms exceeds the panel buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration to reduce simultaneous alarm triggers.
Event ID: 30000: Tag read/write error — a configured tag could not be read from or written to the PLC.
Verify the PLC data block and address referenced in the HMI tag configuration exist and are accessible. Check PLC program for address conflicts.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1AA47-7BD3)?

The OP 77B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication interfaces. It can also connect to certain third-party controllers supported by WinCC flexible drivers.

What software is used to configure and program the OP 77B panel?

The OP 77B is configured using Siemens WinCC flexible 2005 or later versions. Projects are compiled and downloaded to the panel via the MPI interface or a dedicated PC adapter cable.

What is the supply voltage for the 6AV6355-1AA47-7BD3?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to guarantee reliable operation.

What is the front panel protection rating of the OP 77B?

The front panel of the OP 77B is rated IP65, making it resistant to dust ingress and low-pressure water jets, suitable for typical industrial machine environments.

Can the OP 77B handle alarm management and recipe functions?

Yes, the OP 77B supports alarm logging, alarm acknowledgment, and basic recipe management within the limits of its onboard memory and project configuration in WinCC flexible.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify polarity is correct and voltage is within tolerance.

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

Communication fault displayed on panel — PLC not reachable

Inspect the MPI or PROFIBUS DP cable for physical damage, loose connectors, and correct termination at both ends of the bus. Verify the PLC address configured in the HMI project matches the actual PLC station address.

Replace damaged cables, correct bus termination, and ensure address settings match. Restart both the PLC and the HMI panel after corrections.

Project download fails from WinCC flexible to the panel

Confirm the PC adapter or MPI cable is correctly connected and the correct COM port and transfer speed are selected in WinCC flexible. Check that the panel is in transfer mode.

Set the panel to transfer mode via the panel start screen, select the correct interface settings in WinCC flexible, and retry the download. Replace the PC adapter cable if communication is not established.

Alarms are not displayed or acknowledged on the panel

Verify that alarm tags are correctly configured in the WinCC flexible project and that the corresponding PLC data addresses are active. Check that the alarm view object is present on the relevant HMI screen.

Correct tag addresses in the project, recompile, and reload the project to the panel. Ensure the PLC program is setting the alarm bits as expected.

Panel repeatedly restarts or shows system error on boot

Check for firmware version mismatch between the loaded project and the panel firmware. Inspect the 24 V DC supply for voltage fluctuations or ripple that may cause instability.

Update the panel firmware to the version required by the WinCC flexible project. Stabilize the power supply using a regulated 24 V DC source. If the issue persists, the panel may require servicing.

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