Siemens 6AV6355-1CA47-7BB6 OP 77B

€ 2.495,00

SKU: 6AV6355-1CA47-7BB6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BB6 is an operator panel belonging to the OP 77B series within Siemens' SIMATIC HMI product line. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a keypad-based interface for process monitoring and control. The OP 77B is part of the Micro Panels family and is engineered for straightforward integration into Siemens automation environments.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a built-in membrane keypad for operator input. It supports communication via MPI and PROFIBUS DP interfaces, enabling direct connection to Siemens S7-200, S7-300, and S7-400 PLCs without an additional communication module. The panel is configured using WinCC flexible Micro engineering software and offers a compact, robust housing suitable for panel mounting with an IP65 protection rating on the front face.

The OP 77B is widely used in manufacturing machinery, packaging equipment, and process automation systems where a cost-effective, reliable operator interface is required. Its keypad-based operation makes it suitable for environments where touchscreen panels are not practical, such as dusty or high-vibration industrial settings. The panel is commonly found in machine tool control cabinets, conveyor systems, and small-scale process control installations across automotive, food and beverage, and general manufacturing industries.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Power Consumption	Max. 4.5 W
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% to 90% (non-condensing)
Mounting	Panel mounting
Engineering Software	WinCC flexible Micro
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Configuration error: No project or invalid project loaded on the panel.
Download a valid WinCC flexible Micro project to the panel using the engineering software via MPI or PROFIBUS DP connection.
Event ID: 10001: Communication error: Connection to the configured PLC cannot be established.
Check MPI or PROFIBUS DP cable connections, verify bus address settings on both the panel and PLC, and confirm the PLC is powered and in RUN mode.
Event ID: 10002: Communication timeout: The PLC did not respond within the expected time window.
Verify network cabling integrity, check for address conflicts on the bus, and ensure the PLC program is running correctly.
Event ID: 20000: System memory low: Available memory for runtime operation is insufficient.
Reduce the project size in WinCC flexible Micro by removing unused screens, tags, or alarm entries, then re-download the project.
Event ID: 40000: Alarm buffer overflow: The number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in the project to reduce simultaneous alarm occurrences.
Event ID: 50000: Tag read/write error: A configured tag could not be read from or written to the PLC.
Verify the tag address in WinCC flexible Micro matches the actual PLC data block or memory address. Check PLC program for address availability.
Event ID: 60000: Operating system error: An internal system fault has been detected.
Perform a panel restart by cycling the 24 V DC supply. If the fault persists, perform a factory reset and re-download the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7BB6)?

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 communicate with S7-200 via PPI protocol.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible Micro engineering software. Projects are downloaded to the panel via the MPI or PROFIBUS DP interface.

What is the supply voltage for the 6AV6355-1CA47-7BB6?

The panel requires a 24 V DC supply voltage for operation.

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. The rear of the unit is rated IP20.

Does the OP 77B support touchscreen input?

No, the OP 77B is a keypad-based operator panel and does not feature a touchscreen. Operator input is performed exclusively via the integrated membrane keypad.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check for correct polarity. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is within tolerance and correctly connected. Replace the supply fuse if blown. If the display remains blank with confirmed correct supply, the panel may require repair or replacement of the internal power supply board.

Panel displays 'No project' or fails to load the project after startup

The panel memory may be empty or the project file may be corrupted. Connect the engineering PC via MPI or PROFIBUS DP and attempt to re-download the project.

Re-download the WinCC flexible Micro project to the panel. If the download fails repeatedly, perform a factory reset via the panel's transfer mode and then re-download the project.

Communication fault displayed; panel cannot connect to PLC

Check the MPI or PROFIBUS DP cable for damage or loose connectors. Verify the bus address configured on the panel matches the network settings. Confirm no address conflicts exist on the bus.

Replace or reseat the communication cable. Correct the bus address in the WinCC flexible Micro project and re-download. Ensure terminating resistors are correctly placed at both ends of the PROFIBUS DP segment.

Keypad buttons are unresponsive or intermittently responsive

Inspect the membrane keypad surface for physical damage, contamination, or deformation. Test each key systematically in a diagnostic or transfer mode if available.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the membrane keypad assembly may be worn or damaged and should be replaced. Contact a qualified repair technician for keypad replacement.

Panel repeatedly restarts or crashes during operation

Check the 24 V DC supply for voltage fluctuations or ripple using a multimeter or oscilloscope. Review the project for excessive tag polling rates or oversized alarm buffers that may overload the panel CPU.

Stabilize the power supply by using a regulated 24 V DC source with adequate current capacity. Optimize the WinCC flexible Micro project by reducing polling cycles and alarm buffer size, then re-download the project to the panel.

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