Siemens 6AV6355-1AA47-7CB3 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7CB3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7CB3 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This unit is a compact, key-operated operator panel designed for straightforward machine-level human-machine interface tasks. It provides a monochrome display with a numeric/function keypad for operator input and process visualization in industrial environments.

The OP 77B features a built-in MPI/PROFIBUS DP interface for direct integration with Siemens SIMATIC S7 PLCs, enabling reliable communication without additional hardware. The panel supports configuration via Siemens WinCC flexible software and offers recipe management, alarm logging, and trend display capabilities within its onboard memory. The rugged front panel construction meets IP65 protection on the front face, making it suitable for direct panel mounting in demanding environments.

This operator panel is widely used in manufacturing automation, machine building, and process control applications where a cost-effective, reliable HMI solution is required. It is particularly suited for integration with S7-200, S7-300, and S7-400 PLC systems in industries such as packaging, food and beverage, and general factory automation. Its compact form factor and keypad-based operation make it appropriate for applications where touchscreen interfaces are not required.

Technical Specifications

Display Type	Monochrome LCD (STN)
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 4.8 W
Communication Interface	MPI / PROFIBUS DP
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 mounting
Configuration Software	WinCC flexible 2008 or later
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Connection to PLC lost or communication timeout on MPI/PROFIBUS DP interface.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC is powered and the configured station address matches the PLC settings.
Event ID: 10001: Communication error detected on the configured PLC connection.
Verify the communication parameters (baud rate, station address) in the WinCC flexible project match the PLC configuration. Restart both the panel and PLC.
Event ID: 20000: Project download failed or project data is corrupt.
Re-download the WinCC flexible project to the panel. Ensure the correct panel type is selected in the project settings.
Event ID: 40000: Operating system or firmware version mismatch detected.
Update the panel firmware using ProSave or WinCC flexible to match the version required by the project.
Event ID: 50000: Internal memory error or configuration data could not be loaded.
Perform a factory reset via the panel loader menu and re-download the project. If the fault persists, the internal flash memory may require service.
Event ID: 60000: Tag or variable limit violation — a process value has exceeded its configured high or low limit.
Check the process value and associated PLC data block. Verify tag configuration and limit values in the WinCC flexible project.
Event ID: 70000: Recipe data transfer error between the panel and the PLC.
Check the recipe configuration in WinCC flexible. Ensure the PLC data block addresses assigned to the recipe are correct and accessible.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1AA47-7CB3)?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with S7-1200 and S7-1500 controllers using appropriate configuration in WinCC flexible.

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

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are downloaded to the panel via MPI cable or a USB-to-MPI adapter using the ProSave utility.

What is the supply voltage for the 6AV6355-1AA47-7CB3?

The panel operates on 24 V DC. The supply must be within the specified tolerance range and should be a regulated SELV power supply.

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

The front panel of the OP 77B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Can the OP 77B display graphical objects or only text?

The OP 77B supports basic graphical elements including bar graphs, trend curves, and bitmap images in addition to text-based screens, within the limitations of its monochrome display.

Troubleshooting

Display remains blank after power is applied

Measure 24 V DC at the power supply connector on the rear of the panel. Check the internal fuse if accessible. Observe whether the backlight is on but the display shows no content, or whether there is no backlight at all.

If no voltage is present, check the external power supply and wiring. If voltage is correct but the display is blank, attempt a firmware recovery using ProSave. A failed backlight or LCD may require panel repair or replacement.

Panel shows 'Connecting…' and never establishes communication with the PLC

Verify the MPI or PROFIBUS DP cable is correctly wired and terminated. Check that the station address configured in the WinCC flexible project matches the PLC's actual MPI address. Confirm the PLC is in RUN or STOP mode and powered on.

Correct any address mismatches in the project and re-download. Replace the communication cable if continuity testing reveals a fault. Ensure bus termination resistors are enabled only at the two physical ends of the bus.

Panel repeatedly restarts or enters loader mode unexpectedly

This may indicate a corrupted project file, a firmware mismatch, or an internal memory fault. Check whether the panel completes its boot sequence or halts at the loader screen.

Use ProSave to perform a clean firmware update and re-download the project. If the panel continues to restart after a fresh firmware installation, the internal flash memory or hardware may be faulty and require professional repair.

Alarm messages are not appearing on the panel despite fault conditions in the PLC

Check the alarm configuration in the WinCC flexible project. Verify that the PLC bit addresses assigned to alarm triggers are correct and that the PLC is writing to those addresses during the fault condition.

Correct any address mapping errors in the alarm configuration and re-download the project. Use the PLC's online monitoring tools to confirm the trigger bits are being set as expected.

Function keys on the panel do not respond or produce incorrect actions

Inspect the keypad membrane for physical damage or contamination. Verify the key assignments in the WinCC flexible project are correctly configured for the installed panel variant.

Clean the keypad area if contamination is suspected. If keys are physically damaged, the front membrane assembly may need replacement. Confirm the correct panel type is selected in the WinCC flexible project to ensure key mapping is accurate.

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