Siemens 6AV6355-3DA00-0BF1 OP 77B

€ 560,00

SKU: 6AV6355-3DA00-0BF1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-3DA00-0BF1 is the OP 77B operator panel, part of the SIMATIC HMI Basic Panels product family from Siemens. It is a compact, key-operated operator panel designed for straightforward machine-level human-machine interface tasks. The unit provides a text-based display interface for monitoring and controlling automation processes connected to SIMATIC PLCs.

The OP 77B features a 4-line STN LCD text display capable of showing alphanumeric characters, with a membrane keypad for operator input including function keys and system keys. It communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and supports recipe management, alarm logging, and message display functions. The housing is rated IP65 on the front face, making it suitable for panel-mounting in industrial environments.

The OP 77B is widely used in manufacturing, machine building, and process automation applications where a cost-effective, robust operator interface is required without the need for graphical display capabilities. It is commonly found on packaging machinery, conveyor systems, and general-purpose industrial machines where operators need to monitor process values and acknowledge alarms. Its compact form factor and simple keypad operation make it well suited for space-constrained control panels.

Technical Specifications

Display Type	STN LCD, text-based
Display Lines	4 lines
Characters per Line	20 characters
Input Method	Membrane keypad
Function Keys	8 function keys
Communication Interface	MPI / PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
Input Voltage	24 V DC
Power Consumption	Max. 4.5 W
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the OP 77B and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the configuration in WinCC flexible. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC interrupted during operation. The panel lost communication with the configured controller.
Inspect the communication cable for damage or loose connectors. Check bus termination and cable shielding. Restart both the panel and the PLC if the connection does not recover automatically.
Event ID: 20000: Configuration or project data error. The project loaded on the panel contains inconsistencies or is incompatible with the panel firmware version.
Reload the project using WinCC flexible, ensuring the project is compiled without errors and is compatible with the installed firmware version on the OP 77B.
Event ID: 40000: System memory error. The panel has detected an issue with its internal memory or the loaded project data is corrupted.
Perform a factory reset of the panel and reload the project. If the error persists, the internal memory may be faulty and the unit should be inspected for hardware defects.
Event ID: 50000: Firmware update error. A firmware update process was interrupted or failed to complete successfully.
Retry the firmware update using the correct firmware version for the OP 77B via WinCC flexible or ProSave. Ensure stable power supply during the update process.
Event ID: 60000: Power supply undervoltage detected. The 24 V DC supply voltage has dropped below the minimum operating threshold.
Measure the supply voltage at the panel connector. Ensure the power supply unit is providing a stable 24 V DC within the specified tolerance. Check wiring for voltage drops.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-3DA00-0BF1)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication interfaces. It can also communicate with SIMATIC S7-1200 in some configurations depending on firmware version.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2005 or later versions. Projects are compiled in WinCC flexible and transferred to the panel via MPI, PROFIBUS DP, or a direct PC adapter connection.

What is the supply voltage for the 6AV6355-3DA00-0BF1?

The OP 77B requires a 24 V DC supply voltage. The power consumption is a maximum of 4.5 W under normal operating conditions.

What is the IP protection rating of the OP 77B?

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

Can the OP 77B display graphical content or images?

No, the OP 77B is a text-based operator panel with a 4-line alphanumeric LCD display. It does not support graphical or bitmap image display; it is intended for text messages, numeric values, and alarm displays only.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the supply terminals. Verify the power connector is fully seated. Inspect the internal fuse if accessible.

Ensure the power supply is providing stable 24 V DC within tolerance. Replace the supply cable or connector if damaged. If the display remains blank with confirmed correct voltage, the panel may require internal repair or replacement of the display module.

Panel shows communication error and cannot connect to PLC

Verify the MPI or PROFIBUS DP address configured in the WinCC flexible project matches the physical address set on the PLC. Check cable continuity and bus termination at both ends of the network.

Correct any address mismatches in the WinCC flexible project and reload it to the panel. Replace damaged communication cables and ensure proper bus termination resistors are installed at both ends of the MPI or PROFIBUS segment.

Function keys do not respond when pressed

Test each function key systematically. Check whether the issue is with specific keys or all keys. Inspect the membrane keypad for physical damage, contamination, or deformation.

Clean the keypad surface carefully. If individual keys are unresponsive due to membrane wear or damage, the keypad membrane assembly should be replaced. If all keys fail simultaneously, suspect a firmware or configuration issue and reload the project.

Project transfer from WinCC flexible fails

Check the communication interface used for transfer (MPI adapter or PROFIBUS connection). Verify the PC adapter drivers are correctly installed and the correct COM port or USB adapter is selected in WinCC flexible transfer settings.

Reinstall the PC adapter software and select the correct interface in WinCC flexible. Ensure the panel is in transfer mode before initiating the download. Try an alternative cable or adapter if the issue persists.

Alarm messages are not displayed on the panel

Check the alarm configuration in the WinCC flexible project to ensure alarm bits are correctly mapped to PLC data areas. Verify the PLC program is setting the correct alarm trigger bits.

Review and correct the alarm tag assignments in WinCC flexible. Reload the updated project to the panel. Confirm in the PLC program that the alarm trigger conditions and memory addresses match those configured in the HMI project.

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