Siemens 6AV6355-1CA47-7CL1 OP 77B

€ 1.995,00

SKU: 6AV6355-1CA47-7CL1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CL1 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This compact operator panel is designed for machine-level human-machine interface applications, providing a straightforward interface for process visualization and operator control. It is a panel-mount device intended for integration into control cabinet doors or machine enclosures.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a membrane keypad for operator input, eliminating the need for a touchscreen. It supports the MPI and PROFIBUS DP communication interfaces for direct connection to Siemens SIMATIC S7 PLCs, and is configured using WinCC flexible software. The panel operates on a 24 V DC supply and is rated IP65 on the front face, providing protection against dust and water ingress in industrial environments.

The OP 77B is widely used in manufacturing, machine building, and process automation applications where a cost-effective, robust operator interface is required at the machine level. It is particularly suited for smaller machines and systems where basic parameter display, setpoint entry, and status monitoring are needed without the complexity of a full graphical HMI. Industries such as packaging, food and beverage, automotive assembly, and general factory automation commonly deploy this panel.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Power Consumption	4 W (typical)
Communication Interface	MPI, PROFIBUS DP
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
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2005 or higher
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 MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI project configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during runtime operation.
Inspect the communication cable for damage or loose connectors. Check for electromagnetic interference sources near the cable routing. Re-establish the connection and monitor for recurrence.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Verify the PC-to-panel transfer cable is correctly connected. Ensure WinCC flexible is set to the correct transfer mode and the panel is in transfer mode. Retry the download.
Event ID: 40000: System memory low. The panel's available memory for runtime operation is insufficient.
Reduce the number of active alarms or logged data entries in the project. Optimize the project configuration in WinCC flexible to reduce memory usage and re-download.
Event ID: 50000: Operating system or firmware error detected on the panel.
Perform a panel reset by cycling power. If the fault persists, update the panel firmware using ProSave or WinCC flexible. A factory reset may be required if the firmware is corrupted.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in the project to reduce unnecessary alarm triggers or increase the alarm buffer size if possible.
Event ID: 30000: Tag read/write error. A configured tag could not be read from or written to the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for address conflicts and ensure the data type matches.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

The OP 77B is designed for use with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-200 via PPI protocol.

What software is required to configure the 6AV6355-1CA47-7CL1?

The panel is configured using Siemens WinCC flexible 2005 or a later version. The project is then transferred to the panel via a PC adapter cable or PROFIBUS connection.

What is the supply voltage for this operator panel?

The OP 77B requires a 24 V DC power supply with an acceptable range of 19.2 V DC to 28.8 V DC.

Is the OP 77B panel suitable for outdoor use?

The front face of the panel is rated IP65, making it resistant to dust and water jets, but it is not rated for direct outdoor exposure to sunlight or extreme weather without additional enclosure protection.

Can the OP 77B be used as a replacement for older Siemens OP7 or OP17 panels?

The OP 77B is functionally a successor to older panels such as the OP7 and OP17, and can often serve as a replacement with appropriate project migration using WinCC flexible, though mechanical dimensions and connector positions may differ.

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 power connector for correct wiring polarity.

Correct any wiring errors or supply voltage issues. If the supply voltage is correct and the display remains blank, the internal power supply or LCD backlight may have failed, requiring panel repair or replacement.

Panel displays 'No connection to PLC' or communication error at runtime

Check the MPI or PROFIBUS DP 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 and baud rate in the HMI project match the PLC settings.

Replace or reseat the communication cable. Correct any address or baud rate mismatches in the WinCC flexible project and re-download. Ensure only the two physical endpoints of the bus have termination resistors enabled.

Panel cannot be switched to transfer mode for project download

Confirm the panel is not in runtime mode with a locked transfer function. Check whether the transfer settings in the panel's loader menu are enabled. Verify the PC adapter or transfer cable is functioning correctly.

Access the panel's loader menu by restarting the panel and pressing the appropriate key combination during boot. Enable the transfer mode from the loader. If the panel is locked, perform a factory reset using ProSave to restore transfer capability.

Keypad buttons are unresponsive or intermittently responsive

Inspect the membrane keypad for physical damage, contamination, or wear on the key contacts. Check whether the issue is limited to specific keys or affects all keys uniformly.

Clean the keypad surface with a dry cloth to remove contamination. If specific keys are damaged or the membrane is worn through, the keypad membrane assembly requires replacement. Contact a qualified repair service for membrane replacement.

Alarm messages are displayed in incorrect language or with garbled text

Check the language settings configured in the WinCC flexible project. Verify that the correct language pack is included in the downloaded project and that the active language index is set correctly.

Open the project in WinCC flexible, confirm the language configuration, and ensure all alarm texts are correctly entered for the target language. Re-download the corrected project to the panel.

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