Siemens 6AV6355-1CA47-7CB3 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7CB3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CB3 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI Basic Panels product family manufactured by Siemens. This unit serves as a compact human-machine interface designed for straightforward machine-level visualization and operator control tasks. It is a key component in Siemens' portfolio of entry-level HMI devices, offering reliable panel-based operation in industrial environments.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in varying ambient light conditions. 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 Compact or STEP 7 Micro/WIN software and provides function keys for operator input, with no touch functionality. It operates on a 24 V DC supply and is rated IP65 on the front face for protection against dust and water ingress.

The OP 77B is widely deployed in manufacturing, packaging, and process automation applications where a cost-effective, robust operator interface is required at the machine level. Its compact form factor and keypad-based operation make it suitable for control cabinets and machine panels with limited space. Industries such as food and beverage, automotive assembly, and general factory automation commonly use this panel for local machine monitoring and parameter adjustment.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
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
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check PROFIBUS DP or MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Restart both the PLC and the HMI panel.
Event ID: 10001: Timeout error on the communication link. The HMI did not receive a response from the PLC within the expected time window.
Check network cable integrity and connector seating. Verify baud rate settings on both the HMI and PLC. Reduce network load if multiple devices share the bus.
Event ID: 20000: Project download error. The configuration project could not be transferred to the HMI panel successfully.
Verify the USB or serial transfer cable is correctly connected. Ensure WinCC flexible or the correct configuration tool version is used. Check available memory on the device and retry the download.
Event ID: 40000: System memory low. The HMI panel is running low on available runtime memory, which may affect display performance.
Reduce the number of active alarms or logged data entries. Simplify the project if possible. Consider archiving or clearing the alarm buffer.
Event ID: 50000: Internal device error. A hardware or firmware fault has been detected within the HMI panel.
Perform a power cycle on the panel. If the error persists, perform a factory reset and re-download the project. Contact Siemens technical support or arrange for unit repair if the fault recurs.
Event ID: 60000: Configuration error detected at runtime. The loaded project contains settings incompatible with the current firmware version or hardware configuration.
Verify that the WinCC flexible project version matches the firmware version of the panel. Update firmware if necessary and re-download the project.

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 Siemens controllers supported by WinCC flexible Compact.

What software is used to configure the 6AV6355-1CA47-7CB3?

This panel is configured using Siemens WinCC flexible Compact or WinCC flexible Standard software. For S7-200 applications, STEP 7 Micro/WIN with the appropriate HMI wizard can also be used.

Does the OP 77B support touch input?

No, the OP 77B does not have a touchscreen. Operator input is performed exclusively via the integrated function keys and navigation keys on the panel front.

What is the supply voltage for this HMI panel?

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

What is the IP protection rating of the OP 77B?

The front face of the OP 77B is rated IP65, providing protection against dust and low-pressure water jets. The rear of the unit is rated IP20.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals of the panel. Measure voltage at the connector to confirm supply integrity. Inspect for any blown internal fuse.

Ensure the 24 V DC supply is within tolerance and correctly wired. If supply voltage is confirmed correct and the display remains blank, the internal power supply or backlight may have failed and the unit should be sent for repair or replacement.

HMI shows communication error or no connection to PLC

Verify the PROFIBUS DP or MPI cable is correctly connected and terminated at both ends. Check that the PLC address configured in the HMI project matches the actual PLC station address. Inspect the cable for damage or loose connectors.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download. Ensure bus termination resistors are enabled only at the physical ends of the network.

Project download fails or transfer is not recognized

Confirm the correct transfer cable is being used and that the panel is in transfer mode. Check that the PC running WinCC flexible has the correct COM port or USB settings configured.

Set the panel to transfer mode via the Start Center menu. Use the correct Siemens PC/PPI or USB-to-MPI adapter. Reinstall the WinCC flexible communication driver on the PC if the connection is still not recognized.

Operator keys are unresponsive or intermittently failing

Inspect the keypad membrane for physical damage, contamination, or wear. Check if the issue is consistent across all keys or limited to specific ones, which may indicate a localized membrane fault.

Clean the keypad area with a dry cloth to remove contamination. If specific keys have failed due to membrane wear, the unit requires keypad membrane replacement or full panel refurbishment.

Panel repeatedly restarts or enters an error loop at startup

This may indicate a corrupted project file on the panel or a firmware mismatch. Attempt to access the Start Center during boot by pressing the appropriate key combination to prevent the project from auto-loading.

Perform a factory reset via the Start Center and re-download a verified project from WinCC flexible. If the issue persists after re-download, update the panel firmware to the latest compatible version using the Siemens ProSave tool.

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