Siemens 6AV6355-1AA47-7BD5 OP 77B

€ 1.995,00

SKU: 6AV6355-1AA47-7BD5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BD5 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 keypad-based interface for process visualization and control. It is part of the SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG as a robust front-panel-mount device.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in various lighting conditions. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs without an additional communication module. The unit is configured using WinCC flexible software and offers a membrane keypad with function keys for operator input. It operates on a 24 V DC supply and is rated to IP65 on the front face for protection against dust and water ingress.

The OP 77B is widely used in manufacturing automation, packaging machinery, conveyor systems, and process plant equipment where a cost-effective, compact operator interface is required. Its PROFIBUS DP connectivity makes it suitable for distributed control architectures, and its rugged construction allows deployment in industrial environments with elevated dust and humidity levels. The panel is particularly common in machine tool, food and beverage, and general factory automation applications.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
Mounting	Panel mounting
Configuration Software	WinCC flexible 2008 or later
Certifications	CE, UL
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. The panel cannot establish or maintain a connection to the configured controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC interrupted during runtime. The panel lost communication with the controller after an initial successful connection.
Inspect cable integrity and connector seating. Check for electromagnetic interference sources near the communication cable. Verify bus termination at both ends of the PROFIBUS segment.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Verify the PC-to-panel connection cable is functional. Ensure WinCC flexible project is compiled without errors before transfer. Check that the correct communication port and transfer settings are selected.
Event ID: 40000: System memory low or configuration data error. The panel has detected an issue with the stored project data.
Re-download the WinCC flexible project to the panel. If the error persists, perform a factory reset and re-transfer the project.
Event ID: 50000: Backlight failure or display hardware fault detected.
Check the 24 V DC supply voltage at the panel connector. If supply is correct, the backlight unit may require replacement or the panel may need to be returned for repair.
Event ID: 70000: Tag read/write error. The panel is unable to read from or write to a configured PLC tag or data address.
Verify the PLC tag addresses in the WinCC flexible project match the actual PLC program. Check that the data block or memory area referenced exists in the PLC and is accessible.
Event ID: 60000: Operating system or firmware error on the HMI panel. The panel software has encountered an unrecoverable internal fault.
Perform a panel restart by cycling the 24 V DC power supply. If the fault recurs, update the panel firmware using the Siemens ProSave tool or contact Siemens technical support.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1AA47-7BD5)?

The OP 77B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with S7-1200 and S7-1500 controllers in certain configurations using appropriate protocol settings.

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

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are compiled in WinCC flexible and downloaded to the panel via MPI or a serial/USB transfer cable.

What is the supply voltage for the 6AV6355-1AA47-7BD5?

The panel operates on a 24 V DC supply. The supply must be within the specified tolerance range, typically 19.2 V DC to 28.8 V DC.

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

The front face of the OP 77B is rated to IP65, providing protection against dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Can the OP 77B display be used as a touchscreen?

No, the OP 77B uses a membrane keypad with dedicated function keys for operator input. It does not have a touchscreen interface.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check that the voltage is within the 19.2 V to 28.8 V DC range. Inspect the supply cable and connector for damage or loose connections.

Restore the supply voltage to the correct range. If the supply is correct and the display remains blank, the backlight or internal power circuitry may be faulty and the panel should be sent for repair or replacement.

Panel shows 'No connection to PLC' or communication error at startup

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

Correct any wiring or termination issues. Update the HMI project address settings in WinCC flexible if there is a mismatch, recompile, and re-download the project to the panel.

Project download fails or transfer is not recognized

Check the transfer cable connection between the PC and the panel. Ensure the panel is set to transfer mode (accessible via the panel's start center or loader menu). Verify WinCC flexible project has no compilation errors.

Place the panel in transfer mode manually via the loader menu. Use a known-good MPI or PC adapter cable. Recompile the WinCC flexible project and retry the download.

Function keys do not respond or produce incorrect actions

Inspect the membrane keypad for physical damage, contamination, or deformation. Verify the key assignments in the WinCC flexible project are correctly configured and the project has been downloaded to the panel.

Clean the keypad surface if contaminated. If keys are physically damaged, the front panel membrane assembly requires replacement. If the configuration is incorrect, update and re-download the WinCC flexible project.

Panel restarts repeatedly or enters a boot loop

Check the 24 V DC supply for voltage drops or instability under load. Inspect the project data integrity by attempting to re-download the project. Check for any firmware corruption by connecting via ProSave.

Stabilize the power supply and ensure adequate current capacity. Re-download the project using WinCC flexible. If the issue persists, use Siemens ProSave to update or restore the panel firmware.

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