Siemens 6AV6355-1AA47-7DL4 OP 77A

€ 2.495,00

SKU: 6AV6355-1AA47-7DL4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7DL4 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 process visualization and control. It is a key component in Siemens' portfolio of entry-level HMI devices, offering reliable performance in industrial environments.

The OP 77A features a monochrome LCD display with a resolution suitable for displaying text and simple graphics, along with a membrane keypad for operator input. It supports the MPI and PROFIBUS DP communication interfaces, enabling direct integration with Siemens SIMATIC S7 PLCs. The panel is configured using Siemens WinCC flexible software and supports alarm management, recipe handling, and trend display functions within its onboard memory capacity.

The OP 77A is widely used in manufacturing, packaging, and process automation applications where a cost-effective, compact HMI solution is required at the machine level. Its robust construction and compatibility with the SIMATIC S7 controller family make it suitable for integration into existing Siemens automation architectures. Typical installations include conveyor systems, pumping stations, and general-purpose machine control panels.

Technical Specifications

Display Type	Monochrome LCD (STN)
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 2005 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup. The loaded project is incompatible or corrupted.
Reload the project using WinCC flexible. Verify the project was compiled for the correct HMI device type and firmware version.
Event ID: 10001: Communication connection to the PLC has failed or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI configuration.
Event ID: 20000: No project loaded on the device.
Transfer a valid project to the panel using WinCC flexible via MPI or a PC/PPI cable.
Event ID: 40000: Tag communication error. A configured tag cannot be read from or written to the PLC.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check PLC program is running.
Event ID: 70010: Recipe data error. A recipe record could not be read or written correctly.
Check recipe configuration in WinCC flexible. Verify sufficient memory is available and recipe tag addresses are correct in the PLC.
Event ID: 10002: Firmware version mismatch between the loaded project and the panel firmware.
Update the panel firmware using ProSave or WinCC flexible to match the version required by the project, or recompile the project for the installed firmware version.
Event ID: 50000: Alarm buffer overflow. The number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear existing alarms. Review alarm configuration to reduce unnecessary alarm triggers and increase acknowledgement frequency.

Frequently Asked Questions

Which PLCs are compatible with the OP 77A (6AV6355-1AA47-7DL4)?

The OP 77A is primarily designed for use with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-200 via PPI protocol.

What software is used to configure the OP 77A?

The OP 77A is configured using Siemens WinCC flexible 2005 or a later compatible version. Projects are transferred to the panel via MPI cable or using the ProSave utility.

What is the supply voltage for the 6AV6355-1AA47-7DL4?

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

Does the OP 77A support recipe and alarm management functions?

Yes, the OP 77A supports basic alarm management including alarm logging and acknowledgement, as well as recipe handling for parameter management on the machine.

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 suitable for panel-mount installations where dust and water spray resistance is required.

Troubleshooting

Display remains blank after power is applied

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

Ensure the 24 V DC supply is within tolerance and correctly wired. If the supply is confirmed good and the display remains blank, the internal power supply or display backlight may have failed and the unit should be sent for repair or replacement.

Panel displays 'No project' or boots to transfer mode unexpectedly

The panel has lost its project data, possibly due to a firmware update, memory fault, or accidental reset during a previous transfer.

Reconnect the panel to the engineering PC running WinCC flexible and retransfer the compiled project. Ensure the transfer is completed without interruption and the correct device type is selected.

Communication error displayed; PLC connection cannot be established

Check the MPI or PROFIBUS DP cable for physical damage and verify that bus termination resistors are correctly placed at both ends of the network. Confirm the PLC node address and baud rate in the HMI project match the PLC configuration.

Replace or reseat the communication cable. Correct any address or baud rate mismatches in the WinCC flexible project and retransfer. Ensure the PLC is in RUN mode and the network is properly terminated.

Operator keypad inputs are not responding or are erratic

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

Clean the keypad surface with a dry cloth. If specific keys are permanently unresponsive, the membrane keypad assembly may need to be replaced. Contact a qualified repair technician for keypad replacement.

Panel firmware update fails or panel becomes unresponsive during update

A failed firmware update can leave the panel in an undefined state. This may be caused by a communication interruption during the update process or an incompatible firmware file.

Use the ProSave tool to restore the panel firmware in bootstrap mode. Connect via MPI and follow the Siemens recovery procedure for the OP 77A to reload a compatible firmware version before retransferring the project.

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