Siemens 6AV6355-1CA47-7CD2 OP 77B

€ 2.995,00

SKU: 6AV6355-1CA47-7CD2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CD2 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. It is a compact, key-operated panel designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling automated processes. This unit is part of the SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG.

The OP 77B features a monochrome STN LCD display and is equipped with function keys and system keys for navigation and control without requiring a touchscreen. It supports communication via PROFIBUS DP and MPI interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The panel is configured using WinCC flexible software and offers sufficient memory for tags, alarms, and recipes suited to small to mid-scale machine applications.

The OP 77B is widely deployed in manufacturing, packaging, and process automation environments where a robust, cost-effective operator interface is required at the machine level. Its compact form factor and keypad-based operation make it suitable for installations in control cabinets and machine panels where space is limited and touchscreen operation is not necessary. Industries such as food and beverage, automotive assembly, and general factory automation commonly use this panel for local operator control stations.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 6 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/Protection Rating	IP65 (front panel)
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 77B
Configuration Software	WinCC flexible 2008 or later
Certifications	CE, UL

Common Error Codes and System Events

Event ID: 10000: Connection to PLC lost or communication timeout on MPI/PROFIBUS interface.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC is powered and in RUN mode. Check configured station address matches PLC settings.
Event ID: 10001: Connection to PLC established after a previous communication failure.
Informational event. No corrective action required. Monitor for recurring disconnections which may indicate cable or network issues.
Event ID: 20000: Tag read error — the panel cannot read the configured tag from the PLC.
Verify the tag address exists in the PLC program and that the data type matches the HMI configuration in WinCC flexible.
Event ID: 20001: Tag write error — the panel cannot write a value to the configured PLC tag.
Check that the PLC memory area is not write-protected and that the tag address and data type are correctly configured in WinCC flexible.
Event ID: 40000: Recipe data error — inconsistency detected in recipe records stored on the panel.
Re-transfer recipe data from the configuration PC using WinCC flexible. If the error persists, perform a memory reset and reload the project.
Event ID: 60000: System memory low — available panel memory for runtime operation is critically low.
Reduce the number of active alarms, tags, or recipe entries in the WinCC flexible project. Transfer an optimized project to the panel.
Event ID: 70000: Operating system error or firmware fault detected during panel startup.
Perform a panel reset by holding the appropriate key combination during boot. If the fault persists, re-flash the panel firmware using ProSave or WinCC flexible.
Event ID: 80000: Configuration transfer error — project download from PC to panel was interrupted or failed.
Check the transfer cable or network connection between the PC and panel. Restart the transfer in WinCC flexible and ensure the panel is in transfer mode.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

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

What software is used to configure the Siemens 6AV6355-1CA47-7CD2?

The panel is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are downloaded to the panel via MPI, PROFIBUS, or a direct PC adapter connection.

What is the supply voltage for the OP 77B?

The OP 77B operates on 24 V DC supply voltage, which is the standard control voltage used in most industrial control cabinet environments.

Does the OP 77B support touchscreen operation?

No, the OP 77B is a key-operated panel and does not feature a touchscreen. Operator input is performed via the integrated function keys and system keys on the front face.

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 resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check that polarity is correct and voltage is within the specified tolerance range.

Correct any wiring errors or supply voltage issues. If the supply voltage is confirmed correct and the display remains blank, the internal power supply or display backlight may have failed and the unit should be sent for repair or replacement.

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

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

Replace or reseat the communication cable. Confirm the PLC station address and baud rate in WinCC flexible match the PLC configuration. Ensure the PLC is powered on and in RUN or STOP mode.

Project transfer from PC to panel fails or times out

Check the PC adapter or MPI/USB cable connection. Confirm the panel is set to transfer mode by pressing the appropriate key combination during startup.

Restart the panel in transfer mode and retry the download in WinCC flexible. Try a different PC adapter or cable if available. Ensure the WinCC flexible version is compatible with the panel firmware version.

Function keys do not respond or produce incorrect actions

Check the WinCC flexible project configuration to verify that the function keys are correctly assigned to the intended actions or screens. Inspect the key membrane for physical damage.

Re-download the corrected project to the panel. If keys are physically damaged or unresponsive despite correct configuration, the keypad membrane assembly requires replacement.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file on the panel or a firmware issue. Observe whether the panel reaches the startup screen before restarting.

Boot the panel into transfer mode and re-transfer a known good project using WinCC flexible. If the problem persists, re-flash the panel firmware using the Siemens ProSave tool to restore the operating system.

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