Siemens 6AV6355-1CA47-7EC3 OP 77B

€ 1.045,94

SKU: 6AV6355-1CA47-7EC3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EC3 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel operator device is designed for machine-level human-machine interface applications, providing operators with a straightforward interface for monitoring and controlling automated processes. The OP 77B series is part of the broader SIMATIC HMI Basic Panels generation, offering reliable operation in industrial environments.

The OP 77B features a monochrome LCD display with a membrane keypad for operator input, eliminating the need for a touchscreen while maintaining robust usability in harsh conditions. It communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs without additional hardware. The panel is configured using Siemens WinCC flexible software and supports alarm management, recipe handling, and trend display functions within its onboard memory capacity.

The OP 77B is widely deployed in manufacturing, packaging, and process automation applications where a cost-effective, durable operator interface is required at the machine level. Its compact form factor and keypad-based operation make it suitable for environments where touchscreen panels may be impractical due to contamination, gloves, or vibration. Industries such as food and beverage, automotive assembly, and general machine building commonly use this panel for local operator control stations.

Technical Specifications

Display Type	Monochrome LCD (STN)
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 4.5 W
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
Configuration Software	WinCC flexible 2008 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Connection to PLC interrupted or communication timeout detected 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: No connection to the configured PLC at startup; the panel cannot establish initial communication.
Verify the communication interface settings in WinCC flexible match the PLC configuration. Check cable integrity and bus termination.
Event ID: 20000: System memory low; available memory for runtime data is critically reduced.
Reduce the number of active alarms, recipes, or trend buffers. Consider archiving data and restarting the panel.
Event ID: 40000: Configuration download error; the project transferred to the panel contains incompatible or corrupt data.
Re-download the project from WinCC flexible. Ensure the WinCC flexible version is compatible with the panel firmware version.
Event ID: 50000: Internal panel hardware fault detected; self-diagnostic routine has identified a hardware error.
Perform a panel reset. If the fault persists, the panel may require repair or replacement of internal components.
Event ID: 60000: Firmware update failed or firmware version mismatch detected between panel and project.
Re-flash the panel firmware using the correct version via WinCC flexible or ProSave tool. Ensure firmware matches the project configuration.
Event ID: 70000: Recipe data error; a recipe record could not be read from or written to the panel memory.
Check recipe configuration in WinCC flexible. Clear recipe data on the panel and re-download. Verify memory availability.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7EC3)?

The OP 77B is compatible with Siemens S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with S7-1200 and S7-1500 PLCs using PROFIBUS DP in certain configurations.

What software is required to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. ProSave can be used for firmware updates and panel backup/restore operations.

What is the supply voltage for the 6AV6355-1CA47-7EC3?

The panel operates on 24 V DC supply voltage. Ensure the power supply is within the specified tolerance range to avoid operational issues.

Does the OP 77B support touchscreen input?

No, the OP 77B uses a membrane keypad for operator input and does not feature a touchscreen. This makes it suitable for environments where gloves are worn or where contamination is a concern.

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 24 V DC at the power supply connector on the rear of the panel. Check for blown internal fuse or incorrect polarity connection.

Correct the supply voltage polarity if reversed. Replace the internal fuse if blown. If the display backlight has failed, the panel will require repair or backlight replacement.

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

Check MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Verify bus termination is correctly applied at both ends of the bus segment. Confirm station addresses match the WinCC flexible project configuration.

Replace or reseat the communication cable. Correct bus termination. Adjust station address settings in WinCC flexible and re-download the project to the panel.

Project download from WinCC flexible fails or is interrupted

Verify the PC-to-panel connection cable (PC/MPI adapter or USB-MPI adapter) is functioning correctly. Check that the WinCC flexible version is compatible with the panel firmware version.

Update panel firmware using ProSave to match the WinCC flexible project version. Use a known-good MPI adapter and cable. Disable firewall or antivirus software that may interfere with the download process.

Operator keypad buttons are unresponsive or intermittently responsive

Inspect the membrane keypad for physical damage, contamination, or deformation. Check if the issue is limited to specific keys or affects all keys.

Clean the keypad surface with a dry cloth. If individual keys are damaged or the membrane is torn, the keypad membrane assembly will need to be replaced as part of a panel repair.

Panel restarts unexpectedly or enters an error loop

Check the 24 V DC supply for voltage drops or ripple that may cause the panel to reset. Review the alarm and event log on the panel for recorded fault events prior to the restart.

Stabilize the power supply by using a dedicated 24 V DC supply with adequate current capacity. If the restarts persist, perform a factory reset via the panel's Start Center and re-download the project.

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