Siemens 6AV6355-1AA47-7ES0 OP 77A

€ 204,46

SKU: 6AV6355-1AA47-7ES0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7ES0 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 key-based operator interface for monitoring and controlling automated processes. It is part of Siemens' SIMATIC HMI product line, which is widely used in conjunction with SIMATIC S7 PLCs and other Siemens automation systems.

The OP 77A features a monochrome LCD display with a resolution of 128 x 64 pixels, providing clear visualization of process values, alarms, and status information. The panel communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 controllers. It supports configuration through WinCC flexible software and includes function keys for operator input. The unit operates on a 24 V DC supply and is built to withstand typical industrial environmental conditions.

The OP 77A is commonly deployed in machine-level control panels across manufacturing, packaging, and process industries where a cost-effective, robust operator interface is required. Its compact form factor and keypad-based operation make it suitable for applications where touchscreen interfaces are not necessary, such as simple machine status displays, parameter entry stations, and alarm acknowledgment panels in factory automation settings.

Technical Specifications

Display Type	Monochrome LCD
Display Resolution	128 x 64 pixels
Input Voltage	24 V DC
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
Series	SIMATIC HMI OP 77A
Certifications	CE, UL

Common Error Codes and System Events

Event ID: 10000: Configuration error detected during startup; the loaded project may be incompatible or corrupted.
Reload the project using WinCC flexible. Verify that the project version is compatible with the OP 77A firmware version.
Event ID: 10001: Communication link to the PLC has been interrupted or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration.
Event ID: 10002: No project loaded on the device; the panel starts without a valid configuration.
Transfer a valid project to the OP 77A using WinCC flexible via the configured transfer connection.
Event ID: 10003: Firmware version mismatch between the loaded project and the panel firmware.
Update the panel firmware to the version required by the project, or recompile and transfer the project using the matching WinCC flexible version.
Event ID: 20000: Tag read error; the HMI cannot read the value of a configured PLC tag.
Verify the PLC tag address in the WinCC flexible project. Confirm the PLC program is running and the tag area is accessible.
Event ID: 20001: Tag write error; the HMI cannot write a value to the configured PLC tag.
Check that the PLC tag is not write-protected and that the address is correctly configured in the HMI project. Verify PLC is in RUN mode.
Event ID: 40000: Internal device error or hardware fault detected on the operator panel.
Perform a power cycle. If the error persists, check for environmental causes such as excessive temperature or voltage fluctuations. Contact Siemens support or arrange for unit repair.

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 interfaces. It can also communicate with other Siemens controllers that support these protocols.

What software is used to configure the OP 77A?

The OP 77A is configured using Siemens WinCC flexible software. The project is then transferred to the panel via the MPI or PROFIBUS DP connection.

What is the supply voltage for the 6AV6355-1AA47-7ES0?

The panel operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI operator panels.

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 installation in control cabinet doors where dust and water spray may be present.

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

The OP 77A supports basic alarm display and acknowledgment functions. Advanced features such as recipe management and data logging are limited compared to higher-end SIMATIC HMI panels in the series.

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 and verify the supply is within tolerance.

Correct any wiring errors or supply voltage issues. If the supply is confirmed good and the display remains blank, the internal power supply or display unit may be faulty and the panel should be sent for repair.

HMI cannot establish communication with the PLC

Check the MPI or PROFIBUS DP cable for physical damage and verify that bus termination resistors are correctly installed at both ends of the network. Confirm the PLC address configured in the HMI project matches the actual PLC station address.

Replace damaged cables, correct termination, and ensure address settings match. Reload the project if configuration changes were made and perform a power cycle on both the HMI and PLC.

Panel displays 'No project' or starts in transfer mode unexpectedly

The internal flash memory may not contain a valid project, or the panel may have been reset to factory defaults. Check if the transfer mode was triggered intentionally via the startup menu.

Transfer a valid WinCC flexible project to the panel. Ensure the transfer connection settings are correctly configured in both the project and the panel's startup menu.

Function keys do not respond or produce incorrect actions

Verify the key assignments in the WinCC flexible project. Check for physical damage to the keypad membrane or contamination around the keys.

Correct key assignments in the project and retransfer. If keys are physically damaged or unresponsive despite correct configuration, the keypad membrane may require replacement.

Alarm messages are not displayed or acknowledged correctly

Check the alarm configuration in the WinCC flexible project, including trigger tags and alarm classes. Verify that the PLC tags linked to alarm triggers are being updated correctly.

Correct the alarm configuration in the project and retransfer. Confirm PLC logic is setting and resetting alarm bits as intended and that communication between HMI and PLC is stable.

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