Siemens 6AV6355-1CA47-7EB0 OP 77B

€ 634,24

SKU: 6AV6355-1CA47-7EB0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EB0 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact operator panel is designed for machine-level visualization and control tasks, providing a cost-effective human-machine interface solution for straightforward automation applications. It features a monochrome display and a membrane keypad for operator input, making it suitable for environments where a robust, simple interface is required.

The OP 77B panel communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs without the need for additional communication modules. The unit is configured using WinCC flexible software, which allows the creation of screens, alarm messages, and recipes. It supports a limited number of process screens, alarms, and tags, and includes an integrated power supply operating on 24 V DC. The panel housing meets IP65 protection on the front face, making it resistant to dust and water jets in industrial environments.

The OP 77B is widely used in machine building, conveyor systems, packaging machinery, and general factory automation where a simple, reliable operator interface is needed. Its compact form factor and keypad-based operation make it particularly suitable for panel door mounting in control cabinets with limited space. Industries such as food and beverage, automotive assembly, and material handling commonly deploy this panel for local machine control and status monitoring.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input 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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Configuration Software	WinCC flexible 2008 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Configuration error: No project or invalid project loaded on the panel.
Download a valid WinCC flexible project to the panel using the correct transfer settings. Verify the project is compiled without errors before transfer.
Event ID: 20000: Communication error: Connection to the PLC cannot be established or has been lost.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the project configuration.
Event ID: 40000: Tag read/write error: A configured tag cannot be read from or written to the connected controller.
Verify the tag address in the WinCC flexible project matches the actual PLC memory address. Check PLC program is running and the data block or address exists.
Event ID: 50000: System memory low: Available memory on the panel is insufficient for the current operation.
Reduce the number of active alarms or logged data. Consider simplifying the project or clearing the alarm buffer via the panel service menu.
Event ID: 60000: Transfer mode active: Panel is waiting for a project download from the engineering station.
Initiate project transfer from WinCC flexible on the PC, or press the appropriate key combination on the panel to exit transfer mode and return to runtime.
Event ID: 70000: Alarm buffer overflow: The number of pending alarms has exceeded the panel buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in WinCC flexible to reduce the frequency or number of simultaneous alarms.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

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

What software is used to configure the Siemens 6AV6355-1CA47-7EB0?

This panel is configured using Siemens WinCC flexible 2008 or a compatible version. TIA Portal is not supported for this panel generation.

What is the supply voltage for the OP 77B?

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

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

The front face of the OP 77B is rated IP65, providing protection against dust ingress and water jets. The rear of the unit is rated IP20.

Can the OP 77B display color graphics?

No, the OP 77B uses a monochrome STN LCD display. It does not support color graphics, making it suitable for simple text and symbol-based visualization only.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector. Verify the supply is within the specified voltage range and the connector is firmly seated.

Restore correct 24 V DC supply. If the supply is correct and the display remains blank, inspect the internal fuse and consider replacing the panel power supply or the unit itself.

Panel shows 'No project' or boots into transfer mode on every startup

The panel has lost its project data, possibly due to a failed transfer or corrupted flash memory. Check if the project was successfully downloaded previously.

Re-download the WinCC flexible project to the panel. If the problem persists after multiple transfer attempts, perform a factory reset via the panel's Start Center and re-transfer the project.

Communication fault displayed; PLC connection not established

Verify the MPI or PROFIBUS DP cable is connected and undamaged. Check bus termination at both ends of the network and confirm the panel address does not conflict with other devices.

Correct any cable faults or termination issues. Adjust the panel's MPI/PROFIBUS address in the Start Center settings to match the project configuration and ensure it is unique on the network.

Operator keys not responding or responding incorrectly

Inspect the membrane keypad for physical damage, contamination, or wear. Check if the issue is consistent across all keys or limited to specific ones.

Clean the keypad surface with a dry cloth. If keys are damaged or the membrane is worn through, the keypad membrane or the entire panel front unit may need to be replaced.

Alarms are not appearing on the panel despite PLC fault conditions

Check the alarm configuration in the WinCC flexible project, including the trigger tag addresses and alarm classes. Verify the PLC is writing the correct bit values to the configured alarm trigger addresses.

Correct the alarm tag addresses in the WinCC flexible project to match the actual PLC memory locations. Re-download the project and test alarm triggering by manually setting the relevant PLC bits.

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