Siemens 6AV6355-1CA47-7DC2 OP 77B

€ 894,88

SKU: 6AV6355-1CA47-7DC2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7DC2 is an OP 77B operator panel belonging to the SIMATIC HMI Basic Panels product family. It is designed for machine-level operator control and monitoring tasks, providing a compact and robust human-machine interface solution. This unit is part of Siemens' established SIMATIC HMI portfolio and is configured for use with PROFIBUS DP communication.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels, capable of displaying text and simple graphics. It is equipped with a membrane keypad for operator input, including function keys and system keys. The panel supports PROFIBUS DP connectivity for integration with SIMATIC S7 PLCs and other compatible controllers, and includes an MPI interface. Configuration is performed using WinCC flexible software, and the unit operates on a 24 V DC supply.

The OP 77B is widely used in manufacturing, machine building, and process automation environments where a cost-effective, text-based operator interface is required. It is suitable for applications such as conveyor systems, packaging machinery, and general industrial machine control where straightforward parameter display and operator input are the primary requirements. Its compact form factor and panel-mount design make it appropriate for integration into control cabinets and machine panels with limited space.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Power Consumption	Max. 4.5 W
Communication Interface	PROFIBUS DP, MPI
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
Mounting	Panel mounting
Configuration Software	WinCC flexible 2005 or higher
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC or controller.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the configured station address matches the physical device address. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC has been interrupted or cannot be established.
Verify network cabling and connectors. Check that the baud rate configured in WinCC flexible matches the network settings. Restart both the HMI panel and the PLC.
Event ID: 20000: Project download error or configuration data mismatch detected.
Re-download the project from WinCC flexible to the panel. Ensure the WinCC flexible version is compatible with the panel firmware version.
Event ID: 40000: Internal device error or hardware fault detected on the panel.
Perform a panel reset. If the error persists, check the 24 V DC supply voltage. Contact Siemens technical support or arrange for unit repair/replacement.
Event ID: 50000: Firmware update error or corrupted firmware detected.
Re-flash the panel firmware using the correct firmware version via WinCC flexible or the ProSave tool. Ensure power is not interrupted during the update process.
Event ID: 70000: Tag or variable address not found in the connected controller.
Verify that all configured tag addresses in the WinCC flexible project match the actual PLC data block or memory addresses. Correct any mismatched addresses and re-download the project.

Frequently Asked Questions

What communication interfaces does the OP 77B (6AV6355-1CA47-7DC2) support?

The OP 77B supports PROFIBUS DP and MPI communication interfaces for connection to SIMATIC S7 PLCs and compatible controllers.

What software is required to configure the 6AV6355-1CA47-7DC2?

The OP 77B is configured using Siemens WinCC flexible 2005 or a later compatible version. Projects are downloaded to the panel via the MPI or PROFIBUS interface.

What is the supply voltage for the OP 77B panel?

The OP 77B operates on a 24 V DC supply voltage.

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 suitable for installation in environments where dust and water jets may be present.

Is the OP 77B compatible with SIMATIC S7-300 and S7-400 PLCs?

Yes, the OP 77B is compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP, as well as S7-200 PLCs via PROFIBUS DP.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check for correct polarity. Inspect the supply cable for damage or loose connections.

Ensure the supply voltage is within the specified 24 V DC range. Correct any wiring faults. If the supply is confirmed correct and the display remains blank, the internal power supply or display unit may be faulty and require repair or replacement.

Panel displays 'No connection to PLC' or communication error message

Check the PROFIBUS DP or MPI cable connections at both the panel and PLC ends. Verify bus termination is correctly applied at both ends of the network. Confirm the station address configured in WinCC flexible matches the panel's set address.

Replace or reseat the communication cable. Correct the bus termination. Adjust the station address in the project configuration and re-download. Ensure the PLC is powered and in RUN mode.

Project download from WinCC flexible fails or is not recognised by the panel

Verify the WinCC flexible software version is compatible with the panel firmware. Check the communication cable between the PC and the panel. Confirm the correct interface (MPI/PROFIBUS) and baud rate are selected in the transfer settings.

Update the panel firmware to a version compatible with the WinCC flexible project. Use a known-good PC adapter cable (e.g., PC/MPI adapter). Set the correct baud rate and interface in WinCC flexible transfer settings before initiating the download.

Membrane keypad buttons are unresponsive or intermittently responsive

Inspect the keypad membrane for physical damage, contamination, or wear. Check the internal ribbon cable connection between the keypad membrane and the main board.

Clean the keypad surface with a dry cloth. If the ribbon cable is loose, reseat it carefully. If the membrane is physically damaged or worn, replace the keypad membrane assembly.

Panel repeatedly restarts or enters a boot loop

Check the 24 V DC supply for voltage drops or instability under load. Inspect the panel for signs of overheating. Attempt to re-download the project or re-flash the firmware using ProSave.

Stabilise the power supply and ensure adequate current capacity. Allow the panel to cool if overheating is suspected. Re-flash the firmware using the ProSave tool with the correct firmware image for the OP 77B.

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