Siemens 6AV6355-1AA47-7BC1 OP 77A

€ 3.495,00

SKU: 6AV6355-1AA47-7BC1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BC1 is an operator panel belonging to the OP 77A series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact operator panel is designed for machine-level human-machine interface applications, providing a straightforward interface for monitoring and controlling industrial processes. It is a key component in Siemens' range of entry-level HMI devices, offering reliable performance in a robust housing.

The OP 77A features a monochrome STN LCD display with a resolution of 160 x 80 pixels, capable of displaying text and simple graphics for process visualization. It supports communication via MPI and PROFIBUS DP interfaces, enabling seamless integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using Siemens WinCC flexible software and provides function keys for operator input, making it suitable for straightforward control tasks without requiring a touchscreen.

The OP 77A is widely used in manufacturing, packaging, and machine-building industries where a cost-effective, text-based HMI solution is required. It is particularly suited for applications involving conveyor systems, simple process control, and machine monitoring where display complexity is low and reliability is paramount. Its compact form factor and standard panel-mount installation make it easy to integrate into existing control cabinet designs.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Colors	Monochrome (blue/white)
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 77A
Configuration Software	WinCC flexible 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings and ensure the PLC is powered and in RUN mode.
Event ID: 10001: Timeout error on the communication link. The panel did not receive a response from the PLC within the expected time frame.
Check network cabling and connector integrity. Verify baud rate settings match between the HMI and PLC. Reduce network load if multiple devices are on the same bus.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Ensure the correct communication interface is selected in WinCC flexible. Verify the PC-to-panel cable is functioning and retry the download.
Event ID: 40000: System memory error. The panel has detected an issue with its internal memory or the loaded project data is corrupted.
Perform a factory reset on the panel and re-download the project from WinCC flexible. If the error persists, the internal memory may require service or replacement.
Event ID: 50000: Power supply undervoltage detected. The supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel connector. Ensure the power supply unit is rated for sufficient current and check for voltage drops in the wiring.
Event ID: 60000: Operating system error or firmware fault. The panel firmware has encountered an unrecoverable error.
Perform a panel restart. If the fault recurs, update the panel firmware using the Siemens ProSave tool or WinCC flexible.
Event ID: 70000: Configuration mismatch. The project loaded on the panel is not compatible with the current firmware version.
Update the panel firmware to match the version required by the project, or recompile and re-download the project using a compatible version of WinCC flexible.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77A (6AV6355-1AA47-7BC1)?

The OP 77A is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication interfaces. It can also communicate with S7-200 via a PPI connection.

What software is used to configure and program the OP 77A?

The OP 77A is configured using Siemens WinCC flexible 2005 or later versions. Projects are created on a PC and downloaded to the panel via the MPI or PROFIBUS DP interface.

What is the supply voltage for the 6AV6355-1AA47-7BC1?

The panel operates on a 24 V DC supply voltage. Ensure the power supply is adequately rated and within the specified voltage tolerance.

Does the OP 77A support touchscreen input?

No, the OP 77A does not feature a touchscreen. Operator input is performed via dedicated function keys and navigation keys on the panel front.

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

The front panel of the OP 77A carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets, suitable for industrial environments.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check for blown fuses or wiring faults in the supply circuit.

Restore the 24 V DC supply to within specification. If the supply is correct and the display remains blank, the internal power supply board or backlight may be faulty and require replacement.

Panel displays communication error and cannot connect to PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the bus address configured on the panel matches the project settings and does not conflict with other devices.

Replace or reseat the communication cable. Correct any address conflicts on the bus. Ensure termination resistors are only active at the physical ends of the bus segment.

Panel freezes or becomes unresponsive during operation

Determine whether the freeze is reproducible under specific conditions, such as high tag update rates or specific operator actions. Check for memory overload in the project configuration.

Perform a power cycle to restore operation. Optimize the WinCC flexible project to reduce the number of simultaneously active tags and screen objects. Update the panel firmware if the issue persists.

Project download fails from WinCC flexible

Check the PC-to-panel communication cable and the selected interface in WinCC flexible transfer settings. Confirm the panel is in transfer mode.

Place the panel in transfer mode via the panel start menu. Verify the correct COM port or MPI adapter is selected in WinCC flexible. Replace the transfer cable if continuity tests indicate a fault.

Function keys do not respond to operator input

Inspect the keypad membrane for physical damage or contamination. Test each key in the panel's diagnostic or start-up menu if available.

Clean the keypad area with a dry cloth. If keys remain unresponsive, the keypad membrane or internal PCB contact strip may be worn and require replacement.

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