Siemens 6AV6355-1AA47-7DL5 OP 77A

€ 3.495,00

SKU: 6AV6355-1AA47-7DL5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7DL5 is an operator panel belonging to the SIMATIC HMI OP 77A series, designed for human-machine interface applications in industrial automation environments. This unit is part of Siemens' SIMATIC HMI product line and provides a compact, key-operated interface for process visualization and control. It is intended for use with Siemens SIMATIC S7 and other compatible controller families.

The OP 77A features a monochrome LCD display with a resolution of 160 x 80 pixels, providing clear text and basic graphic visualization. It supports MPI and PROFIBUS-DP communication interfaces, enabling direct integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and offers function keys for direct operator input. It operates on a 24 V DC supply and is rated for industrial environments with an IP65 protection rating on the front face.

The OP 77A is commonly deployed in machine-level control panels across manufacturing, packaging, and process industries where a compact, cost-effective HMI solution is required. Its robust keypad-based interface makes it suitable for environments where touchscreen operation is impractical due to gloves or contamination. The panel is typically mounted in control cabinet doors or operator stations on production lines.

Technical Specifications

Display Type	Monochrome LCD
Display Resolution	160 x 80 pixels
Communication Interface	MPI, PROFIBUS-DP
Input Voltage	24 V DC
IP Protection Rating (Front)	IP65
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Configuration Software	WinCC flexible
Series	SIMATIC HMI OP 77A
Mounting	Panel mounting
Certifications	CE, UL

Common Error Codes & System Events

Event ID: 1000: Connection to PLC lost or communication timeout on MPI/PROFIBUS interface.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC is powered and in RUN mode. Check configured station address matches the PLC.
Event ID: 1003: No connection to configured controller; project configuration mismatch.
Verify the controller type and address configured in WinCC flexible match the connected PLC. Re-download the project to the panel if necessary.
Event ID: 10000: General system error during panel startup or runtime.
Perform a panel restart. If the error persists, reload the project via WinCC flexible and check for firmware compatibility.
Event ID: 20000: Project download error; project data could not be transferred to the panel.
Check the PC-to-panel communication cable and interface settings. Ensure WinCC flexible version is compatible with the panel firmware version.
Event ID: 40000: Tag read/write error; the panel cannot read or write a configured PLC tag.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check PLC program for address conflicts.
Event ID: 50000: Firmware update failed or firmware version incompatible.
Re-attempt firmware update using the correct firmware version for the OP 77A. Ensure stable power supply during the update process.
System Error: Flash: Internal flash memory error detected during self-test.
Attempt a factory reset and re-download the project. If the error persists, the panel may require hardware repair or replacement of the flash memory module.

Frequently Asked Questions

Which PLCs are compatible with the OP 77A?

The OP 77A supports SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI and PROFIBUS-DP interfaces. It can also connect to certain third-party controllers supported by WinCC flexible.

What software is used to configure the OP 77A?

The OP 77A is configured using Siemens WinCC flexible software. The project is downloaded to the panel via an MPI or PROFIBUS connection from the engineering PC.

What is the supply voltage for the 6AV6355-1AA47-7DL5?

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 face of the OP 77A is rated IP65, making it resistant to dust ingress and low-pressure water jets, suitable for industrial panel door mounting.

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

The OP 77A supports basic graphics and text on its monochrome LCD display with a resolution of 160 x 80 pixels, but it is primarily designed for text-based process visualization rather than complex graphical screens.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply connector on the rear of the panel. Check the internal fuse if accessible. Verify the power supply unit is capable of providing sufficient current.

Ensure the 24 V DC supply is stable and within tolerance. Replace the fuse if blown. If the supply is correct and the display remains blank, the panel backlight or internal power board may require repair.

Panel shows 'No connection to PLC' message repeatedly

Check MPI or PROFIBUS cable integrity and connector seating. Verify the bus termination is correctly applied at both ends of the network. Confirm the PLC station address matches the configuration in WinCC flexible.

Replace or reseat the communication cable. Correct bus termination using appropriate resistors or terminating connectors. Update the WinCC flexible project with the correct PLC address and re-download.

Panel does not respond to key presses

Check whether the panel is in transfer mode or locked. Verify the project is correctly loaded and the panel is in runtime mode. Inspect the keypad membrane for physical damage.

Exit transfer mode by cycling power or using the WinCC flexible transfer settings. Re-download the project if runtime is not starting. If keys are physically damaged, the keypad membrane assembly requires replacement.

Project download fails from WinCC flexible

Verify the communication cable between the PC and the panel is correctly connected and the correct COM port or USB-to-MPI adapter is selected in WinCC flexible transfer settings.

Use a known-good PC adapter cable (e.g., PC/PPI or USB-MPI adapter). Ensure the panel is in transfer mode before initiating the download. Check that the WinCC flexible version supports the OP 77A firmware version installed.

Panel restarts continuously or enters a boot loop

This may indicate a corrupted project file or a firmware issue. Observe whether the panel reaches the WinCC flexible runtime screen before restarting.

Place the panel in transfer mode and re-download a valid project from WinCC flexible. If the issue persists, perform a firmware update using the correct OP 77A firmware package from Siemens.

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