Siemens 6AV6355-3DA00-0BF0 OP 77B

€ 208,00

SKU: 6AV6355-3DA00-0BF0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-3DA00-0BF0 is the OP 77B operator panel, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact panel provides a text-based operator interface designed for straightforward machine-level control and monitoring tasks. It belongs to the SIMATIC HMI product line and is intended for use with Siemens SIMATIC S7 PLCs and other compatible controllers.

The OP 77B features a 4-line STN monochrome LCD display capable of showing text and simple graphics, with a membrane keypad for operator input. It supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel operates on 24 V DC supply voltage and is configured using WinCC flexible software. It offers a protection rating of IP65 on the front face, making it suitable for panel-mount installations in industrial environments.

The OP 77B is widely deployed in manufacturing, machine building, and process automation applications where a cost-effective, reliable text-based HMI is sufficient. It is commonly found on packaging machinery, conveyor systems, and general-purpose industrial machines where operators need to monitor status messages, set parameters, and acknowledge alarms without requiring a full graphical touchscreen interface.

Technical Specifications

Display Type	STN monochrome LCD
Display Lines	4 lines of text
Input Voltage	24 V DC
Voltage Range	19.2 – 28.8 V DC
Power Consumption	4 W (typical)
Communication Interface	MPI, PROFIBUS DP
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 – 90 % (non-condensing)
Mounting	Panel mounting
Configuration Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes & 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 HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to PLC interrupted during operation. The panel lost communication with the controller after an initial successful connection.
Inspect cable integrity and connector seating. Check for electrical interference on the bus. Verify bus termination at both ends of the network.
Event ID: 20000: Configuration error detected. The project loaded on the panel is incompatible or corrupt.
Re-transfer the project from WinCC flexible to the panel. Verify the project was compiled without errors before transfer.
Event ID: 40000: System memory low. The panel's available working memory is insufficient to run the current project.
Reduce the complexity of the HMI project, decrease the number of active alarms or variables, and re-transfer the optimized project to the panel.
Event ID: 50000: Operating system error. An internal system fault has occurred within the panel firmware.
Perform a panel reset by cycling power. If the fault persists, update the panel firmware using ProSave or WinCC flexible and restore the project.
Event ID: 60000: Transfer mode active. The panel is waiting for a project download from the configuration PC.
Transfer the project using WinCC flexible or ProSave. If transfer mode was entered unintentionally, restart the panel to resume normal operation.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-3DA00-0BF0)?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-1200 and certain third-party controllers depending on the driver support in WinCC flexible.

What software is used to configure the OP 77B?

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

What is the supply voltage for the 6AV6355-3DA00-0BF0?

The panel requires a 24 V DC supply voltage with an operating range of 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 carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Can the OP 77B display graphics or only text?

The OP 77B is primarily a text-based operator panel with a 4-line monochrome LCD. It can display simple bar graphs and status indicators but is not designed for full graphical visualization.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the voltage is within the 19.2–28.8 V DC operating range. Inspect the supply cable and connector for damage.

Correct the supply voltage if out of range. Replace the power supply cable or connector if damaged. If the display remains blank with correct voltage, the internal power supply or display unit may require replacement.

Panel shows communication error and cannot connect to PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the PLC address configured in the HMI project matches the actual PLC station address. Confirm the PLC is powered and in RUN mode.

Replace or reseat the communication cable. Correct the station address in the WinCC flexible project and re-transfer. Add or correct bus termination resistors at the network endpoints.

Project transfer from PC to panel fails

Check that the PC adapter cable (e.g., PC Adapter USB or MPI cable) is correctly connected to both the PC and the panel's MPI port. Verify the transfer settings in WinCC flexible match the panel's communication parameters.

Set the panel to transfer mode manually via the panel's start screen. Ensure the correct COM port and baud rate are selected in WinCC flexible. Try a different PC adapter cable if the issue persists.

Operator keypad buttons are unresponsive or intermittent

Inspect the membrane keypad for physical damage, contamination, or deformation. Check whether the issue is limited to specific keys or affects all keys.

Clean the keypad surface with a dry cloth. If specific keys are permanently unresponsive, the membrane keypad assembly requires replacement. Contact a qualified repair technician to replace the keypad membrane.

Panel repeatedly restarts or enters an error loop after project download

The downloaded project may contain configuration errors or be incompatible with the panel's firmware version. Check the WinCC flexible project for compilation warnings or errors.

Update the panel firmware to the latest compatible version using ProSave. Recompile the project in WinCC flexible, resolve all warnings, and re-transfer the project to the panel.

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