Siemens 6AV6355-1AA47-7BB5 OP 77B

€ 2.995,00

SKU: 6AV6355-1AA47-7BB5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BB5 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This unit is a compact, key-operated panel designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling industrial processes. The OP 77B series is part of the broader SIMATIC HMI Basic Panels generation and is engineered for reliable operation in demanding industrial environments.

The OP 77B features a monochrome STN LCD display and a membrane keypad with function keys, system keys, and numeric entry keys, enabling structured operator input without a touchscreen. It supports MPI and PROFIBUS DP communication interfaces for direct integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs, as well as connections via the PPI protocol. Configuration is performed using Siemens WinCC flexible software, and the panel includes internal flash memory for project storage. The unit operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 77B is widely deployed in machine building, packaging machinery, conveyor systems, and general factory automation where a cost-effective, robust operator interface is required. Its compact form factor and keypad-based operation make it suitable for installations where space is limited or where touchscreen operation is not practical. The panel is commonly found in applications requiring straightforward process visualization, alarm display, and parameter entry at the machine level.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Communication Interface	MPI, PROFIBUS DP, PPI
Input Voltage	24 V DC
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Configuration Software	WinCC flexible 2008
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400
Mounting	Panel mounting
Certifications	CE, UL
Series	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 1000: Configuration error detected; the loaded project is incompatible with the panel firmware version.
Reload the project using the correct WinCC flexible version and ensure firmware compatibility before transferring.
Event ID: 10000: Communication link to the PLC has been interrupted or cannot be established.
Check MPI/PROFIBUS DP cable connections, verify bus address settings on both the panel and PLC, and confirm the baud rate configuration matches.
Event ID: 10001: Timeout on communication with the configured PLC controller.
Verify PLC is in RUN mode, check network topology for bus termination resistors, and confirm the panel station address is unique on the network.
Event ID: 20000: Tag read error; the panel cannot read the value of a configured process tag from the PLC.
Verify the tag address exists in the PLC program, check data block availability, and confirm the tag data type matches the PLC variable definition.
Event ID: 40000: Project transfer error; data transfer between the configuration PC and the panel failed.
Check the transfer cable connection, ensure the panel is set to transfer mode, and verify the PC communication port settings in WinCC flexible.
Event ID: 50000: Internal flash memory error; the panel cannot read or write project data to internal storage.
Perform a panel reset to factory defaults and re-transfer the project. If the fault persists, the panel may require hardware service or replacement.
Event ID: 70000: Power supply undervoltage detected; supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel connector and ensure it remains within the specified tolerance. Check wiring and power supply unit output.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B is compatible with Siemens SIMATIC S7-200 (via PPI), S7-300, and S7-400 PLCs (via MPI or PROFIBUS DP). It also supports a range of third-party controllers through configurable drivers in WinCC flexible.

What software is used to configure the 6AV6355-1AA47-7BB5?

This panel is configured using Siemens WinCC flexible 2008 or later compatible versions. Projects are created on a PC and transferred to the panel via MPI cable or PROFIBUS connection.

What is the supply voltage for this operator panel?

The OP 77B operates on a 24 V DC supply. The input must remain within the specified tolerance range to ensure reliable operation.

Does the OP 77B support touchscreen operation?

No, the OP 77B uses a membrane keypad with function keys, system keys, and numeric keys. It does not feature a touchscreen display.

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

The front face of the OP 77B is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for typical industrial panel installations.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify that the supply is within the specified operating range and that the connector is fully seated.

Restore the supply voltage to within the correct range. If voltage is correct and the display remains blank, inspect internal fusing and consider panel repair or replacement of the power supply section.

Panel displays a communication error and cannot connect to the PLC

Verify the MPI or PROFIBUS DP cable is correctly connected at both the panel and PLC ends. Check that the bus address configured on the panel matches the network configuration and that termination resistors are correctly placed at both ends of the bus.

Correct any address conflicts, replace damaged cables, and ensure bus termination is applied only at the physical ends of the network. Restart both the panel and PLC after making changes.

Project transfer from PC to panel fails repeatedly

Confirm the panel is placed in transfer mode via the panel start center menu. Check the MPI cable or PROFIBUS connection between the PC and panel, and verify the communication port settings in WinCC flexible match the physical interface.

Replace the transfer cable if faulty, set the correct COM port and baud rate in WinCC flexible, and retry the transfer. Ensure no other software is occupying the PC communication port.

Operator keys are unresponsive or register incorrect inputs

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

Clean the keypad surface with a dry cloth. If specific keys are permanently unresponsive, the membrane keypad assembly may require replacement by a qualified repair technician.

Panel reboots unexpectedly during operation

Monitor the 24 V DC supply for voltage dips or instability, particularly under load changes. Check for loose wiring at the power connector and inspect the environment for excessive vibration or temperature.

Stabilize the power supply by using a dedicated 24 V DC rail with adequate current capacity. Secure all wiring connections and ensure the panel operating environment is within the specified temperature range.

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