Siemens 6AV6355-1AA47-7BB0 OP 77B

€ 1.722,53

SKU: 6AV6355-1AA47-7BB0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BB0 is an operator panel (OP 77B) belonging to the SIMATIC HMI Basic Panels product family. It is a compact, key-operated human-machine interface device designed for straightforward machine-level visualization and operator control tasks. This unit is part of Siemens' established HMI portfolio and is configured and programmed using WinCC flexible software.

The OP 77B features a monochrome STN LCD display with a resolution of 128 x 64 pixels, providing clear text and simple graphic representation. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel includes function keys and navigation keys for operator input, and operates on a 24 V DC supply. Onboard memory supports the storage of project data, alarm logs, and recipe data within the constraints of the Basic Panel class.

The OP 77B is widely used in manufacturing, packaging, and process automation applications where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor and robust keypad design make it suitable for installation in control cabinets and machine panels in industrial environments. The panel is particularly common in applications interfacing with S7-300 and S7-400 controllers in discrete manufacturing and utility systems.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	128 x 64 pixels
Display Size	4 inches (diagonal)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 4.5 W
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	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 77B
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

Event ID: 010000: Configuration error detected on startup. The project data loaded onto 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: 020000: Communication connection to the PLC has been lost or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the panel configuration.
Event ID: 040000: Tag read/write error. The panel cannot access a configured PLC tag.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory area. Check PLC program for address conflicts.
Event ID: 060000: Recipe data error. A recipe record could not be read or written correctly.
Check available panel memory. Re-transfer the project and verify recipe configuration in WinCC flexible.
Event ID: 070000: Alarm buffer overflow. The number of pending alarms exceeds the buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration in WinCC flexible to reduce unnecessary alarm triggers.
Event ID: 080000: System memory low. Available memory for runtime operation is insufficient.
Reduce the project size by removing unused screens, tags, or alarm entries. Re-transfer the optimized project to the panel.
Event ID: 110000: Operating system error. An internal system fault has occurred during runtime.
Perform a panel restart. If the fault persists, perform a factory reset and re-transfer the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1AA47-7BB0)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with SIMATIC S5 controllers via PROFIBUS DP in some configurations.

What software is required to configure and program this panel?

The OP 77B is configured using Siemens WinCC flexible 2005 or a later version. Projects are compiled in WinCC flexible and transferred to the panel via MPI cable or PROFIBUS connection.

What is the supply voltage for the 6AV6355-1AA47-7BB0?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid operational faults.

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

The front panel of the OP 77B carries an IP65 protection rating, making it suitable for installation in environments where dust and water spray may be present.

Can the OP 77B display graphical images or only text?

The OP 77B can display simple graphics and icons in addition to text on its 128 x 64 pixel monochrome LCD. Complex graphical visualizations are not supported due to the Basic Panel class limitations.

Troubleshooting

Display remains blank after power is applied

Check the 24 V DC supply voltage at the panel power connector. Verify the supply is within tolerance and the connector is fully seated.

Restore correct 24 V DC supply. If voltage is correct and display remains blank, the internal power supply or LCD backlight may be faulty and the panel should be sent for repair or replacement.

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

Inspect the MPI or PROFIBUS DP cable for damage or loose connections. Verify bus termination resistors are correctly installed at both ends of the bus segment.

Replace or reseat the communication cable. Correct the bus termination. Verify that the PLC address and baud rate configured in WinCC flexible match the actual PLC settings.

Project transfer from WinCC flexible fails or times out

Check the MPI cable connection between the programming PC and the panel. Verify the correct COM port and transfer settings are selected in WinCC flexible.

Use a known-good Siemens MPI/PC adapter cable. Set the panel to transfer mode via the panel's Start Center menu before initiating the transfer from WinCC flexible.

Operator keys are unresponsive or register incorrect inputs

Inspect the keypad membrane for physical damage, contamination, or deformation. Test individual keys in the panel's Start Center diagnostic mode if available.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the keypad membrane assembly may need replacement by a qualified repair technician.

Panel repeatedly restarts or crashes during runtime

Check for project configuration errors by reviewing the alarm and event log. Verify the 24 V DC supply is stable and free from voltage spikes or drops.

Stabilize the power supply using a suitable UPS or filter. Re-compile and re-transfer the WinCC flexible project after correcting any configuration errors. Perform a factory reset if instability persists.

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