Siemens 6AV6355-1CA31-8DL7 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA31-8DL7 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA31-8DL7 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 cost-effective solution for visualizing and controlling industrial processes. It features a monochrome display and a membrane keypad for straightforward operator interaction in automation environments.

The OP 77B panel communicates via MPI and PROFIBUS DP interfaces, enabling seamless integration with SIMATIC S7-200, S7-300, and S7-400 PLCs as well as other compatible controllers. The device is configured using WinCC flexible software, which allows engineers to create and download projects defining screens, alarms, and recipes. The robust housing and membrane keypad are designed to withstand the demands of industrial environments, and the panel supports multiple languages for operator text display.

The Siemens OP 77B is widely deployed in manufacturing, packaging, and process automation applications where a compact, reliable operator interface is required at the machine level. Its compatibility with the broad SIMATIC S7 controller family makes it suitable for retrofitting existing installations as well as new machine builds. Industries such as automotive, food and beverage, and general manufacturing commonly use this panel for local operator control and status monitoring.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Resolution	320 x 240 pixels
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 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/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: Configuration error detected during startup; the loaded project is incompatible or corrupted.
Re-download the project from WinCC flexible to the panel and verify project compatibility with the firmware version.
Event ID: 10001: Communication error with the connected PLC; connection to the controller has been lost or cannot be established.
Check MPI or PROFIBUS DP cable connections, verify bus address settings on both the panel and PLC, and confirm the PLC is in RUN mode.
Event ID: 10002: Tag read error; the panel cannot read a configured tag from the PLC.
Verify the tag address in the WinCC flexible project matches the actual PLC data block or memory address. Check PLC program for correct data availability.
Event ID: 10003: Tag write error; the panel cannot write a value to a configured PLC tag.
Check that the target PLC memory area is not write-protected and that the tag address is correctly configured in the WinCC flexible project.
Event ID: 10004: Recipe data error; a recipe record could not be read or written correctly.
Verify recipe configuration in WinCC flexible, check available memory on the panel, and re-download the project if the recipe structure has changed.
Event ID: 10005: System memory low; the panel is running low on available runtime memory.
Reduce the number of active screens, limit the number of simultaneous alarms, and optimize the project to reduce memory usage. Consider restarting the panel.
Event ID: 10006: Firmware update error; a firmware update process was interrupted or failed.
Repeat the firmware update procedure using the correct firmware version for the OP 77B via ProSave or WinCC flexible. Ensure stable power supply during the update.
Event ID: 10007: Alarm buffer overflow; the number of pending alarms has exceeded the buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in WinCC flexible to reduce unnecessary alarm triggers.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1CA31-8DL7)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports communication with S7-1200 and certain third-party controllers through appropriate drivers configured in WinCC flexible.

What software is used to configure and program the OP 77B panel?

The OP 77B is configured using Siemens WinCC flexible 2008 or a compatible version. Projects are created on a PC and downloaded to the panel via a PC/PPI cable, MPI adapter, or PROFIBUS connection.

What is the supply voltage for the 6AV6355-1CA31-8DL7?

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

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

The front panel of the OP 77B achieves IP65 protection, making it resistant to dust ingress and low-pressure water jets, suitable for typical industrial machine environments.

Can the OP 77B display alarms and messages from the connected PLC?

Yes, the OP 77B supports alarm and message display. Alarms can be configured in WinCC flexible and triggered by PLC bit signals, with the panel capable of displaying alarm text, timestamps, and acknowledgement status.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check that the supply is within tolerance and that the connector is fully seated.

If supply voltage is correct, perform a panel reset by holding the appropriate key combination during startup. If the display remains blank, the internal power supply or backlight may require replacement or the unit may need professional repair.

Panel fails to communicate with the PLC

Verify the MPI or PROFIBUS DP bus address configured on the panel matches the project settings. Check physical cable connections and termination resistors at both ends of the bus.

Correct any address mismatches in the panel startup menu or WinCC flexible project. Replace damaged cables and ensure proper bus termination. Confirm the PLC is powered and in RUN or STOP mode as required.

Project download from WinCC flexible fails

Check the PC-to-panel connection cable and the selected transfer channel in WinCC flexible. Verify the panel is in Transfer mode, accessible via the panel startup menu.

Switch the panel to Transfer mode manually via the Start Center menu. Ensure the correct COM port or MPI adapter is selected in WinCC flexible transfer settings. Try a different cable or adapter if the issue persists.

Operator inputs via keypad are not responding

Check whether the panel is in a locked or protected operating mode. Verify that the keypad is not physically damaged and that the project has correctly assigned functions to the keys.

Disable any active operator protection or password lock via the project or panel settings. If keys are physically unresponsive, the membrane keypad assembly may need replacement.

Alarm messages are displayed in the wrong language

Check the language settings configured in the WinCC flexible project and the active runtime language selected on the panel.

Switch the active language on the panel using the configured language-switching button or screen object. If no language switch is configured, update the project in WinCC flexible to add the correct language and re-download to the panel.

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