Siemens 6AV6355-1AA47-7BE3 OP 77B

€ 2.495,00

SKU: 6AV6355-1AA47-7BE3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BE3 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This unit serves as a compact human-machine interface designed for machine-level operation and monitoring tasks. It is intended for use with SIMATIC S7 PLCs and other compatible Siemens automation systems.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in various lighting conditions. It supports communication via MPI and PROFIBUS-DP interfaces, enabling direct integration into existing Siemens automation networks. The panel includes function keys and a numeric keypad for operator input, and is configured using WinCC flexible software. It operates on a 24 V DC supply and is rated to IP65 on the front face, providing protection against dust and water ingress.

The OP 77B panel is widely used in manufacturing, packaging, and process automation applications where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor and robust construction make it suitable for installation in control cabinets and machine panels in industries such as automotive, food and beverage, and general industrial manufacturing. The direct PROFIBUS-DP and MPI connectivity allows seamless integration into existing Siemens S7-based control architectures without the need for additional communication hardware.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Input Voltage	24 V DC
Voltage Range	19.2 V DC – 28.8 V DC
Communication Interface	MPI, PROFIBUS-DP
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
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
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Connection to PLC lost or communication timeout on MPI/PROFIBUS-DP interface.
Check MPI/PROFIBUS-DP cable connections and bus termination resistors. Verify PLC is powered and running. Check station address settings on both the panel and PLC.
Event ID: 10001: Connection to PLC established after a previous communication failure.
Informational event. No corrective action required. Monitor for recurring disconnections.
Event ID: 20000: Project download failed or project data corrupted in panel memory.
Re-download the project from WinCC flexible to the panel. Ensure USB or MPI transfer cable is properly connected and the correct project file is used.
Event ID: 40000: Illegal tag value received from PLC — value is outside the configured limits for a tag.
Check the PLC program for the affected tag. Verify tag address and data type configuration in WinCC flexible matches the PLC variable definition.
Event ID: 50000: System memory low — available panel memory is insufficient for current project operation.
Reduce the number of active alarms or logged data entries. Optimize the project in WinCC flexible to reduce memory usage.
Event ID: 70000: Backlight failure or backlight lifetime warning — display backlight is degraded or has failed.
Replace the operator panel or arrange for backlight servicing. Continued operation may result in unreadable display.
Event ID: 60000: Operating system or firmware error detected during panel startup.
Perform a panel reset by cycling power. If the fault persists, reload the panel firmware using the appropriate Siemens service tool or replace the unit.

Frequently Asked Questions

What communication interfaces does the OP 77B (6AV6355-1AA47-7BE3) support?

The OP 77B supports MPI and PROFIBUS-DP communication interfaces, allowing direct connection to Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs without additional gateways.

What software is used to configure and program this panel?

The 6AV6355-1AA47-7BE3 is configured using Siemens WinCC flexible software. The project is then transferred to the panel via MPI cable or USB transfer adapter.

What is the supply voltage for this operator panel?

The panel operates on 24 V DC with an acceptable input range of 19.2 V DC to 28.8 V DC.

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

The front face of the OP 77B is rated to IP65, providing full protection against dust ingress and protection against low-pressure water jets.

Can this panel be used as a replacement for older Siemens OP7 or OP17 panels?

The OP 77B is designed as a functional successor to older Siemens operator panels such as the OP7 and OP17, and can be used as a replacement with appropriate project migration in WinCC flexible.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check that the voltage is within the 19.2 V to 28.8 V range. Inspect the supply cable and connector for damage.

Correct the supply voltage if out of range. If voltage is correct and display remains blank, the backlight or internal power supply may have failed — replace the panel or arrange for component-level repair.

Panel displays 'No connection to PLC' or communication error on startup

Verify MPI or PROFIBUS-DP cable is securely connected at both the panel and PLC ends. Check bus termination is correctly applied at both ends of the network. Confirm the MPI/PROFIBUS address configured in the panel project matches the PLC address.

Correct any address mismatches in the WinCC flexible project. Replace damaged cables. Ensure bus termination resistors are enabled only at the physical ends of the network segment.

Project download from WinCC flexible fails or panel does not accept new project

Check the transfer cable connection between the PC and the panel. Verify the panel is set to transfer mode. Confirm the WinCC flexible version is compatible with the panel firmware version.

Set the panel to transfer mode via the panel loader menu. Use the correct MPI or USB transfer cable. Update WinCC flexible or panel firmware if version incompatibility is identified.

Touchscreen or function keys are unresponsive

Check whether the panel is in transfer mode or loader mode, which disables normal operation. Inspect the keypad membrane for physical damage or contamination.

Exit transfer or loader mode to restore normal operation. If keys remain unresponsive, clean the keypad area. If the fault persists, the keypad membrane or internal controller board may require replacement.

Panel reboots repeatedly or fails to complete startup

Observe the startup sequence for any error messages or event IDs displayed before the reboot. Check the 24 V DC supply for voltage drops or instability under load.

Stabilize the power supply and ensure adequate current capacity. If the panel displays a firmware error, reload the firmware using the Siemens service tool. If the issue persists, the panel may require repair or replacement.

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