Siemens 6AV6355-1CA47-7EH5 OP 77B

€ 1.287,43

SKU: 6AV6355-1CA47-7EH5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EH5 is an OP 77B operator panel belonging to the SIMATIC HMI Basic Panels product family. This unit provides a compact, keypad-based human-machine interface designed for straightforward machine-level operation and monitoring tasks. It is part of Siemens' established line of operator panels intended for integration into industrial control systems.

The OP 77B features a monochrome STN LCD display and a membrane keypad for operator input, supporting configuration via Siemens WinCC flexible software. It communicates over MPI and PROFIBUS DP interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel operates on a 24 V DC supply and is rated IP65 at the front face, providing protection against dust and water ingress in panel-mounted installations.

The OP 77B is commonly deployed in machine building, packaging, material handling, and general factory automation applications where a cost-effective, reliable operator interface is required. Its compact form factor and keypad-based operation make it suitable for environments where touchscreen interfaces are impractical, such as applications involving gloved operators or high-vibration machinery. The panel is well suited for OEM machine builders requiring a standardized HMI solution across multiple machine variants.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input Voltage	24 V DC
Voltage Range	19.2 – 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)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

Event ID: 10000: Configuration error detected on startup; the loaded project is incompatible with the panel firmware version.
Reload a compatible project using WinCC flexible and ensure firmware and project versions match.
Event ID: 10001: No project loaded on the panel; the device starts without a valid configuration.
Transfer a valid WinCC flexible project to the panel via MPI or PROFIBUS DP connection.
Event ID: 20000: Communication error with the configured PLC; the panel cannot establish a connection.
Check MPI/PROFIBUS DP cabling, verify bus address settings, and confirm PLC is powered and running.
Event ID: 20001: PLC connection timeout; the panel lost communication with the PLC during operation.
Inspect network cabling for damage, verify termination resistors are correctly placed, and check PLC status.
Event ID: 40000: Internal device error; a hardware fault has been detected within the panel.
Cycle power to the panel. If the fault persists, the unit requires service or replacement.
Event ID: 50000: Flash memory write error; the panel was unable to save data to internal storage.
Check available memory on the panel, reduce project size if necessary, and retry the transfer operation.
Event ID: 60000: Firmware update failed or interrupted during the update process.
Restart the firmware update procedure using the correct firmware file via WinCC flexible or ProSave.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI and PROFIBUS DP interfaces. It can also communicate with S7-200 via PPI protocol.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible 2005 or later versions. Projects are transferred to the panel via MPI or PROFIBUS DP connection.

What is the supply voltage for the 6AV6355-1CA47-7EH5?

The panel requires a 24 V DC supply with an operating 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 and low-pressure water jets when correctly panel-mounted with the supplied seal.

Can the OP 77B display graphics and trend curves?

The OP 77B supports basic graphical elements and bar graphs within WinCC flexible projects, but its monochrome display and limited resources restrict complex graphical applications compared to higher-tier panels.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Verify the voltage is within the 19.2–28.8 V DC operating range. Check for blown fuses in the supply circuit.

Restore the supply voltage to within specification. If the supply is 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 displays 'No project' or starts without a user interface

The panel has no valid WinCC flexible project loaded, or the existing project has been corrupted or deleted.

Connect a PC running WinCC flexible via MPI or PROFIBUS DP and transfer a valid project to the panel. Ensure the project is compiled without errors before transfer.

Communication fault with PLC; panel shows connection error

Check the MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Verify bus termination resistors are installed at both ends of the network. Confirm the bus address configured in the project matches the physical panel address setting.

Replace or reseat cables, correct bus termination, and ensure address settings are consistent between the WinCC flexible project and the panel configuration. Restart both the panel and PLC after corrections.

Keypad buttons are unresponsive or intermittently fail

Inspect the membrane keypad for physical damage, contamination, or wear. Check whether the issue is consistent across all keys or limited to specific keys.

Clean the keypad surface with a dry cloth. If specific keys have failed due to wear or damage, the membrane keypad assembly requires replacement. Contact a qualified repair facility for keypad replacement.

Firmware update fails or panel becomes unresponsive during update

The firmware update process was interrupted, possibly due to a communication error or power loss during transfer.

Use ProSave or WinCC flexible to restart the firmware update procedure. Ensure a stable power supply and reliable MPI connection during the update. If the panel is unresponsive, attempt a bootstrap mode recovery using the manufacturer's documented recovery procedure.

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