Siemens 6AV6355-1AA47-7CJ3 OP 77A

€ 2.995,00

SKU: 6AV6355-1AA47-7CJ3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7CJ3 is an operator panel belonging to the SIMATIC HMI OP 77A series, manufactured by Siemens as part of the SIMATIC HMI product line. This compact operator panel is designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling industrial processes. It is a key-operated panel with a built-in display, intended for integration into control cabinets and machine panels.

The OP 77A features a monochrome LCD display and a membrane keypad for operator input, supporting configuration via Siemens WinCC flexible software. It communicates with SIMATIC S7 PLCs via MPI and PROFIBUS DP interfaces, enabling direct integration into Siemens automation networks. The panel operates on a 24 V DC supply and is built to withstand the environmental demands of industrial settings, with a protection rating suitable for front-panel mounting.

The SIMATIC OP 77A is widely used in manufacturing, machine building, and process automation environments where a cost-effective, reliable operator interface is required at the machine level. It is particularly suited for applications involving SIMATIC S7-200, S7-300, and S7-400 PLCs, where operators need to display process values, set parameters, and acknowledge alarms without requiring a full graphical touchscreen panel.

Technical Specifications

Display Type	Monochrome LCD
Display Size	4 lines x 20 characters
Input/Operating Voltage	24 V DC
Power Consumption	Max. 5 W
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
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
Certifications	CE, UL
Series/Product Family	SIMATIC HMI OP 77A

Common Error Codes & System Events

Event ID: 10000: Configuration error: No project loaded or project is incompatible with the panel firmware.
Download a compatible project using WinCC flexible. Verify firmware version matches the project settings.
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 PLC address settings match the panel configuration.
Event ID: 40000: Tag read error: A configured tag cannot be read from the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program is running.
Event ID: 50000: Tag write error: A value cannot be written to the configured PLC tag.
Check that the target PLC memory area is not write-protected. Verify the tag address and data type in the project configuration.
Event ID: 60000: System memory low: Insufficient memory available for project or runtime data.
Reduce the number of configured screens, tags, or alarm messages. Transfer an optimized project to the panel.
Event ID: 70000: Firmware update error: Firmware transfer to the panel was interrupted or failed.
Restart the firmware update procedure using ProSave or WinCC flexible. Ensure stable power supply during the update process.
Event ID: 80000: Alarm buffer overflow: The alarm buffer has reached its maximum capacity.
Acknowledge and clear pending alarms. Review alarm configuration to reduce alarm frequency or increase buffer size in the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 77A?

The OP 77A 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.

What software is used to configure the OP 77A?

The OP 77A is configured using Siemens WinCC flexible 2005 or later versions. Projects are transferred to the panel via the MPI interface or a PC/PPI cable.

What is the supply voltage for the 6AV6355-1AA47-7CJ3?

The panel operates on a 24 V DC supply voltage. Ensure the power source is within the specified tolerance range to avoid damage or malfunction.

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

The OP 77A has an IP65 protection rating on the front face when correctly mounted in a panel cutout, making it resistant to dust and water jets.

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

The OP 77A is a text-based operator panel and does not support graphical image display. It shows alphanumeric characters and basic symbols on its monochrome character display.

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 that the connector is properly seated.

Restore correct 24 V DC supply. If voltage is correct and display remains blank, the internal power supply or display unit may be faulty and the panel may require repair or replacement.

Panel shows communication error and cannot connect to PLC

Inspect the MPI or PROFIBUS DP cable for physical damage and verify correct termination at both ends of the bus. Check that the PLC address configured in the panel project matches the actual PLC MPI address.

Replace damaged cables, correct bus termination, and ensure address settings match. Restart both the panel and PLC after making corrections.

Project cannot be downloaded to the panel

Verify the PC is connected to the panel via the correct interface (MPI adapter or PC/PPI cable) and that WinCC flexible is set to the correct transfer mode and COM port or USB adapter settings.

Set the panel to transfer mode by navigating to the system menu. Ensure the correct communication driver is installed on the PC and retry the project transfer.

Operator inputs via keypad are not responding

Check whether the panel is in transfer mode or loader mode, which disables normal operation. Inspect the membrane keypad for physical damage or contamination under the keys.

Exit transfer or loader mode by restarting the panel with a valid project loaded. If keypad damage is confirmed, the membrane keypad assembly requires replacement.

Alarms are not displayed on the panel

Verify that the alarm tags in the WinCC flexible project are correctly mapped to the PLC bit addresses that trigger alarms. Check that the PLC program is setting the correct alarm bits.

Correct the tag addresses in the project configuration and re-download the project. Confirm the PLC logic is activating the expected alarm trigger bits during fault conditions.

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