Siemens 6AV6355-1CA47-7BE3 OP 77B

€ 1.995,00

SKU: 6AV6355-1CA47-7BE3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BE3 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a straightforward interface for process visualization and operator control. It is a key component in Siemens' range of entry-level HMI devices, offering reliable operation in industrial environments.

The OP 77B features a monochrome LCD display with a resolution of 128 x 64 pixels and a keypad-based input interface, making it suitable for text-based process monitoring and control tasks. It supports communication via PROFIBUS DP and MPI interfaces, enabling seamless integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and offers a compact, robust housing rated to IP65 on the front face, ensuring protection against dust and water ingress in demanding industrial settings.

The OP 77B is widely used in manufacturing, machine building, and process automation industries where a cost-effective, reliable operator interface is required. It is commonly found on packaging machines, conveyor systems, and general-purpose industrial machinery where text-based status display and parameter entry are sufficient. Its compact form factor and compatibility with the SIMATIC controller ecosystem make it a practical choice for OEMs and system integrators working with Siemens automation platforms.

Technical Specifications

Display Type	Monochrome LCD
Display Resolution	128 x 64 pixels
Input Method	Membrane keypad
Communication Interface	PROFIBUS DP, MPI
Supply Voltage	24 V DC
Power Consumption	Max. 4.5 W
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
Configuration Software	WinCC flexible 2008
Certifications	CE, UL, cULus
Mounting	Panel mounting
Series	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel 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 HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect communication cables for damage or loose connectors. Check bus termination and cable shielding. Restart both the HMI panel and the PLC if the connection is not restored automatically.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Verify the PC-to-panel connection (serial or USB-to-serial adapter). Ensure WinCC flexible version is compatible with the panel firmware. Retry the download after restarting the panel in transfer mode.
Event ID: 40000: System memory error. The panel has detected an issue with internal memory or the project stored in memory.
Perform a factory reset and re-download the project from WinCC flexible. If the error persists, the internal memory may be corrupted and the panel may require servicing or replacement.
Event ID: 50000: Configuration error. The loaded project contains settings or tags that are incompatible with the panel type or firmware version.
Review the project in WinCC flexible for compatibility issues. Ensure the target panel type is set to OP 77B. Update panel firmware if necessary and re-download the project.
Event ID: 60000: Power supply undervoltage detected. The supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel power connector. Ensure the power supply unit is rated for sufficient current. Check wiring for voltage drops due to undersized cables or loose connections.

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 depending on the available drivers in WinCC flexible.

What software is required to configure the 6AV6355-1CA47-7BE3?

The panel is configured using Siemens WinCC flexible 2008 or a compatible version. The project is then transferred to the panel via a serial connection or appropriate adapter.

What is the supply voltage for this panel?

The OP 77B requires a 24 V DC supply voltage for operation.

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 and low-pressure water jets. The rear of the housing is rated IP20.

Can the OP 77B display graphics or only text?

The OP 77B is primarily a text-based operator panel with a 128 x 64 pixel monochrome LCD. It supports basic graphical elements but is optimized for text-based status messages, parameter display, and operator input.

Troubleshooting

Panel display remains blank after power on

Check the 24 V DC supply voltage at the power connector using a multimeter. Verify that the supply polarity is correct and that the voltage is within the specified range.

Ensure the power supply is functioning correctly and delivering stable 24 V DC. If voltage is present and the display remains blank, the internal power supply or display unit may be faulty and the panel should be inspected or repaired.

HMI panel shows communication error to PLC

Verify the MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Check that bus termination resistors are correctly placed at both ends of the bus segment.

Replace or reseat communication cables. Confirm that the PLC station address in the HMI project matches the physical PLC address. Ensure the PLC is powered and in RUN mode, then restart the HMI panel.

Project download fails from WinCC flexible

Check the serial communication cable between the PC and the panel. Ensure the panel is in transfer mode before initiating the download.

Use a compatible USB-to-serial adapter if the PC lacks a native serial port. Restart the panel in transfer mode by holding the appropriate key combination during boot. Verify that the WinCC flexible project is configured for the correct panel type (OP 77B).

Keypad buttons are unresponsive or intermittently responsive

Inspect the membrane keypad for physical damage, contamination, or wear. Check for any visible damage to the keypad overlay or underlying contacts.

Clean the keypad surface with a dry cloth. If individual keys are permanently unresponsive, the membrane keypad assembly may need to be replaced. Contact a qualified repair technician to disassemble and replace the keypad.

Panel repeatedly restarts or resets during operation

Monitor the 24 V DC supply voltage for instability or voltage drops under load. Check for loose wiring at the power connector and inspect the supply unit for faults.

Stabilize the power supply and ensure adequate current capacity. If the supply is stable and restarts continue, the panel firmware may be corrupted — perform a factory reset and re-download the project. If the issue persists, the panel hardware may require servicing.

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