Siemens 6AV6355-1AA47-7BB7 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7BB7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BB7 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI family from Siemens. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a keypad-based interface for process monitoring and control. It is a member of the Micro Panel line, intended for straightforward operator interaction in automation environments.

The OP 77B features a monochrome STN LCD display and a membrane keypad with function keys, system keys, and numeric entry capability. It communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with SIMATIC S7 PLCs. The panel supports configuration through WinCC flexible software and offers recipe management, alarm logging, and trend display functions within its onboard memory capacity.

The 6AV6355-1AA47-7BB7 is typically deployed in machine building, packaging, and manufacturing automation where a cost-effective, robust operator interface is required at the machine level. Its compact form factor and keypad-based operation make it well suited for panel door mounting in control cabinets where touchscreen operation is not required. Industries such as food and beverage, automotive supply, and general factory automation commonly use this panel for local operator control and status monitoring.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 lines x 20 characters
Input/Operating Voltage	24 V DC
Power Consumption	4 W (typical)
Communication Interface	MPI, PROFIBUS DP
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 77B
Configuration Software	WinCC flexible 2005 or higher
Certifications	CE, UL

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup; the loaded project is incompatible with the panel firmware version.
Reload a compatible project using WinCC flexible. Ensure the firmware version on the panel matches the project settings.
Event ID: 10001: Communication link to the PLC has been interrupted or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address and baud rate settings match the panel configuration.
Event ID: 20000: No project loaded on the panel; the device starts in transfer mode.
Download a valid project from WinCC flexible to the panel via MPI or PROFIBUS DP connection.
Event ID: 40000: Tag read error; the panel cannot read a configured PLC data address.
Verify the PLC data block and address referenced in the project exist and are accessible. Check PLC program and communication settings.
Event ID: 40001: Tag write error; the panel cannot write a value to the configured PLC address.
Check that the target PLC address is not write-protected and that the data type in the project matches the PLC definition.
Event ID: 50000: Alarm buffer overflow; the number of pending alarms exceeds the panel buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration to reduce simultaneous alarm occurrences.
Event ID: 60000: System memory low; available memory for runtime operation is insufficient.
Reduce the project size by removing unused tags, screens, or recipes. Transfer an optimized project to the panel.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B 6AV6355-1AA47-7BB7?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication. It can also communicate with S7-200 via PPI protocol.

What software is used to configure and program this panel?

The panel is configured using Siemens WinCC flexible 2005 or later versions. Projects are transferred to the panel via the MPI or PROFIBUS DP interface.

What is the supply voltage for the 6AV6355-1AA47-7BB7?

The panel operates on 24 V DC supply voltage, which is the standard supply for SIMATIC HMI Micro Panels.

Does this panel support touchscreen operation?

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

What is the front panel protection rating of this unit?

The front panel of the OP 77B achieves IP65 protection, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Troubleshooting

Panel display remains blank after power is applied

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

Ensure the 24 V DC supply is within tolerance and correctly wired. Replace the supply fuse if blown. If the display remains blank with correct supply voltage, the panel may require repair or replacement of the display module.

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

Check the MPI or PROFIBUS DP cable for continuity and correct pin assignment. Verify bus termination is applied at both ends of the network. Confirm the PLC address and baud rate configured in the project match the physical network settings.

Replace or reseat the communication cable. Correct the bus address and baud rate in the WinCC flexible project and retransfer. Ensure only the correct nodes have bus termination resistors enabled.

Panel starts in transfer mode instead of loading the project

This indicates no valid project is stored in the panel memory, or the stored project has become corrupted.

Connect a PC running WinCC flexible via MPI or PROFIBUS DP and transfer a valid project to the panel. If the panel repeatedly loses its project, check the backup battery or capacitor condition.

Function keys do not respond or produce incorrect actions

Check whether the correct project is loaded and that the function key assignments in WinCC flexible match the expected behavior. Inspect the membrane keypad for physical damage or contamination.

Retransfer the correct project to the panel. If keys are physically damaged or unresponsive due to membrane wear, the keypad membrane assembly should be replaced.

Alarm messages are not displayed or alarms are missing

Verify that the PLC bit addresses configured for alarm triggers in WinCC flexible are correct and that the PLC program is setting these bits as expected. Check the alarm buffer settings in the project.

Correct any mismatched PLC addresses in the alarm configuration. Increase the alarm buffer size in the project if overflow events are logged. Retransfer the updated project to the panel.

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