Siemens 6AV6355-1AA47-7DJ0 OP 77A

€ 955,52

SKU: 6AV6355-1AA47-7DJ0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7DJ0 is an operator panel belonging to the SIMATIC HMI OP 77A series, manufactured by Siemens. It is a compact, key-operated panel designed for machine-level human-machine interface applications, providing operators with a straightforward means of monitoring and controlling industrial processes. This unit is part of the SIMATIC HMI product line, which is widely deployed across automation environments using Siemens SIMATIC controllers.

The OP 77A features a monochrome LCD display and a membrane keypad with function keys, system keys, and numeric entry keys for direct operator input without a touchscreen. It supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. Configuration is performed using Siemens WinCC flexible software, and the panel includes internal flash memory for project storage. The unit operates on a 24 V DC supply and is rated to IP65 at the front panel, making it suitable for panel-mount installation in industrial enclosures.

The OP 77A is typically used in machine building, manufacturing automation, and process control applications where a cost-effective, robust operator interface is required. It is well suited for tasks such as parameter entry, alarm display, and status monitoring on standalone machines or production lines. Industries including automotive, food and beverage, packaging, and general manufacturing commonly deploy this panel as a local operator station on SIMATIC-controlled equipment.

Technical Specifications

Display Type	Monochrome LCD
Display Size	4 lines x 20 characters
Input/Operating Voltage	24 V DC
Power Consumption	Max. 4.5 W
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
Mounting	Panel mount
Certifications	CE, UL, cULus
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400

Common Error Codes and System Events

Event ID: 10000: Configuration error detected on startup; project data in flash memory is corrupt or missing.
Re-download the project from WinCC flexible to the panel and verify the transfer connection.
Event ID: 20000: Communication link to the PLC has been interrupted or cannot be established.
Check MPI/PROFIBUS DP cable connections, verify bus address settings, and confirm PLC is powered and communicating.
Event ID: 40000: Operating system error; internal firmware fault detected.
Perform a panel reset. If the fault persists, update the firmware using ProSave or WinCC flexible.
Event ID: 50000: Transfer mode active; panel is waiting for a project download.
Initiate project transfer from WinCC flexible, or restart the panel in normal operating mode if transfer is not intended.
Event ID: 60000: Tag communication error; a configured tag cannot be read from or written to the connected controller.
Verify tag addresses in the WinCC flexible project match the PLC data blocks. Check communication settings and cable integrity.
Event ID: 70000: Memory overflow; available flash memory is insufficient for the current project.
Reduce project size by removing unused screens, graphics, or recipes, then re-transfer the project.

Frequently Asked Questions

Which PLCs are compatible with the OP 77A (6AV6355-1AA47-7DJ0)?

The OP 77A is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with certain SIMATIC S5 controllers depending on the configuration.

What software is required to configure this operator panel?

The OP 77A is configured using Siemens WinCC flexible 2005 or a later version. Projects are transferred to the panel via the MPI interface or a direct PC adapter connection.

What is the supply voltage for the 6AV6355-1AA47-7DJ0?

The panel requires a 24 V DC supply voltage. Ensure the power source is within the specified tolerance range to avoid damage or operational faults.

Is the OP 77A panel suitable for outdoor installation?

The front panel is rated IP65, providing protection against dust and water jets, but the unit is not rated for direct outdoor exposure. It should be installed in a suitable enclosure if used in harsh environments.

Does the OP 77A support recipe management or data logging?

The OP 77A supports basic recipe management functions through WinCC flexible. Full data logging and trending capabilities are limited compared to higher-end SIMATIC HMI panels such as the TP or MP series.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the supply is within the specified range and that the connector is fully seated.

Restore correct supply voltage if out of range. If voltage is correct and display remains blank, the internal power supply or backlight may be faulty and the unit should be sent for repair or replacement.

Panel cannot establish communication with the PLC

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

Correct any wiring faults or termination issues. Adjust the bus address on the panel via the start center settings and ensure the PLC program is configured with the correct HMI connection parameters.

Project transfer from WinCC flexible fails or times out

Check the PC adapter or MPI cable connection between the engineering PC and the panel. Confirm the panel is in transfer mode and that the correct COM port and transfer rate are selected in WinCC flexible.

Switch the panel to transfer mode via the start center menu. Verify PC adapter drivers are installed correctly and select the matching baud rate in the WinCC flexible transfer settings.

Operator keys are unresponsive or register incorrect inputs

Inspect the membrane keypad for physical damage, contamination, or deformation. Test individual keys using the panel's built-in key test function available in the start center.

Clean the keypad surface with a dry cloth. If keys remain unresponsive after cleaning, the membrane keypad assembly is likely worn or damaged and requires replacement.

Panel repeatedly displays communication error messages during operation

Monitor the PROFIBUS DP or MPI bus for noise or signal integrity issues. Check cable lengths, shielding, and termination resistors at both ends of the bus segment.

Replace or re-route cables that are damaged or running parallel to high-voltage conductors. Ensure bus termination is active only at the physical ends of the bus segment and that cable lengths do not exceed the specified maximum for the selected baud rate.

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