Siemens 6AV6355-1CA47-7CC0 OP 77B

€ 764,03

SKU: 6AV6355-1CA47-7CC0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CC0 is an operator panel belonging to the OP 77B series, part of the SIMATIC HMI family of human-machine interface devices. This compact panel is designed for machine-level operator control and monitoring tasks, providing a straightforward interface for process visualization and parameter input. It is a key component in Siemens' range of basic HMI panels, suited for applications requiring reliable and cost-effective operator interaction.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels, capable of displaying text and simple graphics. It is equipped with a membrane keypad for operator input, including function keys and numeric/alphanumeric entry. The panel supports MPI and PROFIBUS DP communication interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. Configuration is performed using Siemens WinCC flexible software, and the unit operates on a 24 V DC supply voltage.

The OP 77B is widely deployed in manufacturing, packaging, and process automation environments where a compact, text-based operator interface is sufficient. It is commonly found on standalone machines and production lines where operators need to monitor status, enter setpoints, and acknowledge alarms without requiring a full graphical display. Its robust membrane keypad and compact form factor make it suitable for panel-mounting in industrial control cabinets and machine enclosures.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Input Voltage	24 V DC
Voltage Range	19.2 V DC – 28.8 V DC
Power Consumption	Max. 6 W
Communication Interface	MPI, PROFIBUS DP
Configuration Software	WinCC flexible 2005 or higher
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	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 10000: No connection to the configured PLC or controller. Communication link cannot be established.
Check MPI or PROFIBUS DP cable connections, verify network address settings, and confirm the PLC is powered and running.
Event ID: 10001: Communication error detected on the MPI or PROFIBUS DP interface during operation.
Inspect cable integrity, verify termination resistors are correctly placed, and check for address conflicts on the network.
Event ID: 20000: Project data could not be loaded or is missing from the panel memory.
Re-transfer the project using WinCC flexible via the configured transfer connection and verify project compatibility with the panel firmware version.
Event ID: 40000: Operating system or firmware version mismatch detected.
Update the panel firmware using the Siemens ProSave tool or WinCC flexible to match the version required by the project.
Event ID: 50000: Transfer mode is active; the panel is waiting for a project download from the engineering station.
Transfer the project from WinCC flexible or cancel the transfer mode by pressing the appropriate key combination to return to normal operation.
Event ID: 60000: Internal device error or hardware fault detected on the operator panel.
Perform a power cycle. If the fault persists, check for physical damage and consider returning the unit for repair or replacement.
Event ID: 70000: Alarm buffer overflow; the number of pending alarms exceeds the panel's buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in WinCC flexible to reduce simultaneous alarm generation.

Frequently Asked Questions

Which PLCs are compatible with the Siemens OP 77B (6AV6355-1CA47-7CC0)?

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 certain third-party controllers supported by WinCC flexible drivers.

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

The OP 77B is configured using Siemens WinCC flexible 2005 or later versions. Projects are transferred to the panel via MPI, PROFIBUS DP, or a serial PC/PPI cable.

What is the supply voltage for the 6AV6355-1CA47-7CC0?

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

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, suitable for industrial panel mounting.

Can the OP 77B display graphical images or only text?

The OP 77B is primarily a text-based operator panel with a monochrome LCD. It can display simple graphics and icons but is not designed for full graphical visualization like higher-tier SIMATIC HMI panels.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel's power connector. Check that the voltage is within the 19.2 V to 28.8 V range. Inspect the supply cable and connector for damage.

Correct the supply voltage if out of range. If voltage is correct and display remains blank, the internal power supply or display backlight may have failed, requiring panel repair or replacement.

Panel shows 'No connection to PLC' or communication error on startup

Verify MPI or PROFIBUS DP cable connections at both the panel and PLC ends. Check that the panel's configured MPI/PROFIBUS address matches the network settings and that the PLC is powered and in RUN mode.

Reseat all communication cables, confirm correct bus termination at both ends of the network, and verify address settings in the WinCC flexible project match the physical network configuration.

Project transfer from WinCC flexible fails or times out

Check the transfer cable connection between the engineering PC and the panel. Confirm the panel is in transfer mode and that the correct communication port and transfer settings are selected in WinCC flexible.

Place the panel in transfer mode manually, verify the PC communication port settings, and retry the transfer. If using MPI, ensure the PC adapter (e.g., PC Adapter USB) drivers are correctly installed.

Function keys do not respond or produce incorrect inputs

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically to identify whether the issue is isolated to specific keys or affects the entire keypad.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the membrane keypad assembly may be worn or damaged and should be replaced by a qualified technician.

Panel repeatedly restarts or enters an error loop after project load

Check the firmware version on the panel against the version required by the WinCC flexible project. A mismatch between project and firmware versions can cause boot failures or repeated restarts.

Use the Siemens ProSave tool to update or restore the panel firmware to the correct version, then re-transfer the project from WinCC flexible.

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