Siemens 6AV6355-1AA47-7BB8 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7BB8 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BB8 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This unit is a compact, key-operated operator panel designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling automated processes. It is part of the broader SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 64 pixels, capable of displaying text and simple graphics. It supports communication via PROFIBUS DP and MPI interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel includes function keys and system keys for operator input, and is configured using Siemens 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 in industrial environments.

The OP 77B is widely used in manufacturing, packaging, material handling, and process automation applications where a cost-effective, robust operator interface is required at the machine level. Its compact form factor and keypad-based input make it suitable for installations where touchscreen operation is not practical, such as environments with heavy gloves or high vibration. The panel is commonly found on standalone machines, conveyor systems, and small-to-medium automation cells.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 64 pixels
Display Size	4 inches (diagonal)
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Power Consumption	Approx. 4 W
Communication Interface	PROFIBUS DP, MPI
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)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2008 or later
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400

Common Error Codes and System Events

Event ID: 10000: Communication error between the OP 77B and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check PROFIBUS DP or MPI cable connections and termination resistors. Verify the PLC address settings match the configuration in WinCC flexible. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect the communication cable for damage or loose connectors. Check bus termination and cable shielding. Restart the panel and PLC if the connection is not restored automatically.
Event ID: 20000: Configuration or project download error. The project loaded on the panel is incompatible or corrupted.
Re-download the project from WinCC flexible to the panel. Verify the WinCC flexible version is compatible with the panel firmware version.
Event ID: 40000: System memory low. The panel is running low on available runtime memory.
Reduce the number of active alarms or logged data entries. Optimize the project to reduce memory usage and re-download to the panel.
Event ID: 50000: Internal device error or hardware fault detected on the panel.
Perform a panel reset. If the fault persists, check the 24 V DC power supply quality and replace the panel if hardware failure is confirmed.
Event ID: 60000: Firmware update error. The firmware update process was interrupted or failed.
Retry the firmware update using the correct firmware package for the OP 77B. Ensure stable power supply during the update process.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with certain third-party controllers supported by WinCC flexible drivers.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are downloaded to the panel via a PC/PPI cable or MPI/PROFIBUS connection.

What is the supply voltage for the 6AV6355-1AA47-7BB8?

The panel requires a 24 V DC supply with an acceptable range of 19.2 V DC to 28.8 V DC. An unstabilized power supply is not recommended.

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

The front face of the OP 77B is rated to IP65, providing protection against dust ingress and low-pressure water jets. The rear of the panel is rated IP20.

Can the OP 77B display graphics or only text?

The OP 77B can display both text and simple bitmap graphics on its monochrome STN LCD screen. Complex graphical animations are limited due to the resolution and monochrome nature of the display.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that the voltage is within the 19.2 V to 28.8 V range. Inspect the internal fuse if accessible.

Correct the power supply voltage if out of range. Replace the power supply unit if it is faulty. If the supply is correct and the display remains blank, the panel may require internal repair or replacement of the backlight or display module.

Panel shows communication error and cannot connect to PLC

Verify the PROFIBUS DP or MPI address configured in WinCC flexible matches the physical address set on the PLC. Check the cable connections, bus termination resistors at both ends of the bus, and cable shielding continuity.

Correct any address mismatches in the project configuration and re-download. Replace damaged cables and ensure proper bus termination. Confirm the PLC is powered and in RUN or STOP mode as required.

Project download from WinCC flexible fails

Check the communication cable between the PC and the panel (PC/PPI or MPI adapter). Verify the correct COM port and transfer settings are selected in WinCC flexible. Ensure the panel is in transfer mode.

Place the panel in transfer mode via the panel's start screen. Use a known-good transfer cable and verify driver installation on the PC. If using an MPI adapter, confirm the adapter is correctly configured for the bus speed.

Operator keys are unresponsive or intermittently fail

Inspect the keypad membrane for physical damage, contamination, or deformation. Check that the panel is not exposed to temperatures outside the 0 °C to +50 °C operating range.

Clean the keypad area carefully. If individual keys are mechanically damaged, the keypad membrane assembly may need replacement. Contact a qualified repair technician for internal keypad replacement.

Panel repeatedly restarts or resets during operation

Monitor the 24 V DC supply for voltage dips or ripple using an oscilloscope or multimeter. Check for excessive electrical noise on the supply line from nearby inverters or contactors.

Install a suitable line filter or use a regulated, stabilized 24 V DC power supply. Add adequate separation between the panel power supply cable and high-power cables. If restarts persist with a clean supply, the panel may have an internal hardware fault requiring repair.

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