Siemens 6AV6355-1CA47-7BD0 OP 77B

€ 554,45

SKU: 6AV6355-1CA47-7BD0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BD0 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This unit is a compact, key-operated operator panel designed for machine-level human-machine interface applications, providing operators with a straightforward means of monitoring and controlling industrial processes. The OP 77B is part of the Siemens Basic Panels generation and is engineered for integration with Siemens SIMATIC S7 PLCs and other compatible controllers.

The 6AV6355-1CA47-7BD0 features a monochrome STN LCD display with a resolution of 128 x 64 pixels and a backlit screen for readability in varying ambient light conditions. The panel supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 controllers. It is configured and programmed using WinCC flexible software, supports recipe management, alarm logging, and trend display functions, and operates on a 24 V DC supply voltage. The housing is rated IP65 on the front face, providing protection against dust and water ingress in industrial environments.

The OP 77B panel is widely deployed in machine building, manufacturing automation, and process control applications where a compact, cost-effective operator interface is required. It is particularly suited for standalone machines, packaging equipment, and conveyor systems where operators need to input parameters, acknowledge alarms, and monitor process values. Its robust construction and compatibility with the SIMATIC controller ecosystem make it a practical choice for retrofit and new installation projects across a broad range of industrial sectors.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	128 x 64 pixels
Display Size	4 inch
Input Voltage	24 V DC
Voltage Tolerance	19.2 V DC to 28.8 V DC
Communication Interface	MPI, PROFIBUS DP
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Configuration Software	WinCC flexible 2008 or higher
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the OP 77B 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 settings match the configuration in WinCC flexible. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the configured PLC has been lost during operation.
Inspect the communication cable for damage or loose connectors. Verify network termination and bus address conflicts. Restart the panel and PLC if the connection is not restored automatically.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel.
Verify the PC-to-panel connection (USB or MPI). Ensure WinCC flexible version is compatible with the panel firmware. Check available memory on the panel and retry the download.
Event ID: 40000: System memory low. The panel is running low on available runtime memory.
Reduce the number of active alarms or data records. Optimize the project configuration in WinCC flexible to reduce memory usage and reload the project.
Event ID: 50000: Firmware update error. A firmware update was interrupted or failed to complete.
Retry the firmware update using the ProSave tool. Ensure stable power supply during the update process and use the correct firmware version for this panel variant.
Event ID: 60000: Internal device error detected. A hardware fault has been identified within the panel.
Perform a panel restart. If the error persists, the unit may require repair or replacement. Contact Siemens technical support or a qualified repair service for further diagnosis.
Event ID: 70000: Configuration error. The loaded project contains settings incompatible with the panel hardware or firmware version.
Review the project settings in WinCC flexible and ensure the target panel type and firmware version match the physical device. Re-download the corrected project.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B 6AV6355-1CA47-7BD0?

The OP 77B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with certain third-party controllers that support these protocols.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2008 or a later compatible version. Projects are downloaded to the panel via USB or MPI connection.

What is the supply voltage for the 6AV6355-1CA47-7BD0?

The panel operates on a 24 V DC supply with an acceptable range of 19.2 V DC to 28.8 V DC.

What is the front panel protection rating of the OP 77B?

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

Can the OP 77B display graphical trends and alarms?

Yes, the OP 77B supports alarm display, alarm logging, and basic trend views as part of its runtime functionality when configured appropriately in WinCC flexible.

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 cable and connector for damage.

Correct the supply voltage if out of range. Replace the power cable if damaged. If the supply is correct and the display remains blank, the internal power supply or backlight may have failed and the unit should be sent for repair.

Panel fails to communicate with the PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the bus address configured in WinCC flexible matches the address set on the PLC. Use a bus diagnostic tool to check for address conflicts on the network.

Replace or reseat the communication cable. Correct any address mismatches in the WinCC flexible project and re-download. Ensure only one active bus termination exists at each end of the network segment.

Touchscreen or keys are unresponsive

Determine whether the display is active but inputs are not registered, or whether the panel appears frozen. Check if the panel is in transfer mode, which disables normal operation.

Restart the panel by cycling the 24 V DC power supply. If the panel is stuck in transfer mode, connect via WinCC flexible and switch to runtime mode. If keys remain unresponsive after restart, the keypad membrane or internal controller may require replacement.

Project download fails or times out

Check the USB or MPI connection between the programming PC and the panel. Verify that the panel is in transfer mode before initiating the download. Confirm that the WinCC flexible version matches the panel firmware.

Switch the panel to transfer mode manually via the panel start screen. Use the correct cable and driver for the connection type. Update the panel firmware using ProSave if a version mismatch is detected, then retry the project download.

Alarms are not displayed or acknowledged on the panel

Check the alarm configuration in the WinCC flexible project, including the PLC tag addresses linked to alarm triggers. Verify that the PLC is writing the correct bit values to trigger alarms.

Correct any incorrect tag addresses or alarm class settings in the WinCC flexible project and re-download. Ensure the PLC program is setting the alarm trigger bits as expected. Test alarm triggering by forcing the relevant PLC bits during commissioning.

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