Siemens 6AV6355-1AA47-7ES5 OP 77A

€ 3.495,00

SKU: 6AV6355-1AA47-7ES5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7ES5 is an operator panel belonging to the SIMATIC HMI OP 77A series, designed for human-machine interface applications in industrial automation environments. This compact panel provides a text-based display interface for monitoring and controlling machine processes. It is part of Siemens' SIMATIC HMI product line, which is widely used across a broad range of industrial sectors.

The OP 77A features a monochrome LCD display capable of showing multiple lines of text and numeric values, enabling operators to interact with connected controllers. It supports the MPI (Multi-Point Interface) and PROFIBUS DP communication protocols, allowing direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel includes function keys for operator input, an integrated membrane keypad, and is configured using Siemens WinCC flexible or ProTool engineering software.

The SIMATIC OP 77A is commonly deployed in machine-level control panels, packaging machinery, conveyor systems, and general factory automation equipment. Its compact form factor and robust construction make it suitable for installation in control cabinet doors and operator stations where space is limited. The panel is well-suited for applications requiring straightforward process visualization and operator input without the need for graphical displays.

Technical Specifications

Display Type	Monochrome LCD
Display Lines	4 lines of text
Communication Interface	MPI, PROFIBUS DP
Input/Operating Voltage	24 V DC
Power Consumption	Max. 5 W
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90%, non-condensing
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL
Series/Product Family	SIMATIC HMI OP 77A
Configuration Software	WinCC flexible, ProTool

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the PLC has been interrupted during operation.
Inspect the communication cable for damage or loose connectors. Check bus termination at both ends of the network. Restart the HMI panel after restoring the connection.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Verify the PC-to-panel transfer cable is correctly connected. Check that the correct communication port and baud rate are selected in the engineering software. Retry the download.
Event ID: 40000: Internal device error or hardware fault detected on the panel.
Perform a panel restart. If the fault persists, check the supply voltage at the power connector. Contact Siemens technical support or arrange for unit repair if hardware failure is confirmed.
Event ID: 50000: Configuration or project data is missing or corrupted on the panel.
Re-download the project from the engineering PC using WinCC flexible or ProTool. Ensure the project is compiled without errors before transfer.
Event ID: 60000: Power supply voltage is out of the specified range.
Measure the DC supply voltage at the panel connector and confirm it is within the 24 V DC nominal range. Check the power supply unit and wiring for faults.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP 77A?

The OP 77A supports direct communication with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S5 controllers using appropriate drivers configured in the engineering software.

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

The OP 77A is configured using Siemens WinCC flexible (Compact or Standard edition) or the legacy ProTool software. Projects are downloaded to the panel via a serial PC-to-panel transfer cable.

What is the supply voltage requirement for the 6AV6355-1AA47-7ES5?

The panel requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to guarantee reliable operation.

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

The front face of the OP 77A carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets, suitable for installation in industrial control cabinet doors.

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 is designed for alphanumeric text and numeric value visualization across multiple display lines.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply connector using a multimeter. Inspect the connector for loose or incorrectly wired terminals.

Restore correct 24 V DC supply voltage and ensure proper polarity at the connector. If the supply is correct and the display remains blank, the internal power supply or display unit may require replacement.

HMI panel shows communication error and cannot connect to PLC

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check that bus termination resistors are correctly placed at both ends of the network segment.

Replace or reseat the communication cable. Confirm the PLC station address and baud rate in the HMI project match the physical network configuration. Reload the project if settings were changed.

Project download fails or transfer cannot be initiated

Confirm the PC-to-panel transfer cable is connected to the correct serial port on the PC and the panel's transfer port. Check that the panel is set to transfer mode before initiating the download.

Set the panel to transfer mode via the panel's startup menu. Select the correct COM port and baud rate in WinCC flexible or ProTool. Retry the project download.

Function keys do not respond to operator input

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically using a diagnostic screen if available in the project.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the membrane keypad assembly may be worn or damaged and should be replaced by a qualified technician.

Panel repeatedly restarts or resets during operation

Monitor the 24 V DC supply voltage for fluctuations or drops under load. Check for loose wiring at the power connector and inspect the supply unit for instability.

Stabilize the power supply by ensuring adequate current capacity and secure wiring connections. If the supply is stable and restarts continue, the panel may have an internal hardware fault requiring repair or replacement.

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