Siemens 6AV6355-1CA47-7CC4 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7CC4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CC4 is an operator panel belonging to the OP 77B series within Siemens' SIMATIC HMI product line. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a keypad-based interface for process monitoring and control. As part of the SIMATIC HMI Basic Panels family, it is engineered for straightforward integration into Siemens automation environments.

The OP 77B features a monochrome STN LCD display and a membrane keypad with function keys, system keys, and numeric/alphanumeric input capability. It communicates via MPI and PROFIBUS DP interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs without an additional communication module. The unit operates on a 24 V DC supply and supports configuration through Siemens WinCC flexible software, allowing tag management, alarm logging, and recipe handling within its onboard memory.

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 keypad-based design makes it suitable for environments where touchscreen operation is impractical due to gloves, dust, or vibration. Industries such as automotive, food and beverage, and general machine building commonly use this panel for local operator control and status display.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inches
Display Colors	Monochrome (blue/white)
Input/Operating Voltage	24 V DC
Permissible Voltage Range	19.2 – 28.8 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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Configuration Software	WinCC flexible 2008 or higher
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 1000: Configuration error detected on startup; the loaded project is incompatible with the panel firmware version.
Reload the correct project version using WinCC flexible. Ensure firmware and project version compatibility before transfer.
Event ID: 10000: Communication link to the PLC has been interrupted or cannot be established.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the panel configuration.
Event ID: 10001: PLC is in STOP mode; the HMI cannot read or write process data.
Switch the PLC to RUN mode. Investigate the cause of the PLC STOP condition before resuming operation.
Event ID: 20000: Internal device error; a system fault has been detected in the panel hardware or firmware.
Perform a power cycle. If the fault persists, update the panel firmware or return the unit for hardware inspection.
Event ID: 40000: Project transfer active; the panel is in transfer mode awaiting a project download.
Initiate the project transfer from WinCC flexible, or restart the panel to exit transfer mode if no transfer is intended.
Event ID: 50000: Alarm buffer overflow; the number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration to reduce simultaneous alarm occurrences.
Event ID: 70000: Recipe data error; a recipe record could not be read or written correctly.
Check recipe configuration in WinCC flexible. Verify that recipe tag addresses are valid and accessible in the connected PLC.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B (6AV6355-1CA47-7CC4)?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. 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 2008 or a compatible version. Projects are transferred to the panel via MPI cable or PROFIBUS DP connection.

What is the supply voltage for the 6AV6355-1CA47-7CC4?

The panel requires a 24 V DC supply, with a permissible operating range of 19.2 V DC to 28.8 V DC.

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

The front panel of the OP 77B is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for industrial enclosure mounting.

Does the OP 77B support alarm and recipe functions?

Yes, the OP 77B supports alarm logging and recipe management within its onboard memory, configurable through WinCC flexible.

Troubleshooting

Display remains blank after power on

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

Restore the supply voltage to within specification. If voltage is correct and display remains blank, the internal power supply or display backlight may have failed and the unit should be sent for repair.

No communication with PLC; connection error displayed

Verify MPI or PROFIBUS DP cable integrity and correct termination at both ends of the bus. Check that the PLC station address configured in WinCC flexible matches the actual PLC address. Confirm the PLC is in RUN mode.

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

Panel stuck in transfer mode on startup

The panel has been set to transfer mode, either manually or due to an incomplete previous project transfer. The display will show a transfer prompt or progress screen.

Initiate a project transfer from WinCC flexible to complete the process, or perform a power cycle while holding the appropriate key combination to exit transfer mode and boot the existing project.

Function keys not responding or responding incorrectly

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically using the panel's built-in key test function if available in the service menu.

Clean the keypad surface with a dry cloth. If keys are physically damaged or contacts are worn, the membrane keypad assembly requires replacement. Contact a qualified repair service for keypad replacement.

Alarms not displaying or alarm buffer full message shown

Check the alarm configuration in WinCC flexible for correct PLC tag addresses and trigger conditions. Verify that the alarm buffer size has not been exceeded by a large number of simultaneously active alarms.

Acknowledge and clear active alarms from the panel. If the buffer overflow persists, reduce the number of configured alarms or increase acknowledgment frequency. Retransfer the corrected project if tag addresses were found to be incorrect.

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