Siemens 6AV6355-1CA47-7CM2 OP 77B

€ 1.995,00

SKU: 6AV6355-1CA47-7CM2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7CM2 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This compact panel operator unit is designed for machine-level human-machine interface applications, providing a keypad-based interface for process monitoring and control. It is part of the SIMATIC HMI Basic Panels generation and is manufactured by Siemens AG as a robust front-panel-mount device.

The OP 77B features a monochrome STN LCD display and a membrane keypad with function keys, system keys, and numeric entry capability. It communicates via MPI and PROFIBUS DP interfaces, enabling direct integration with Siemens S7-200, S7-300, and S7-400 PLCs. The unit is configured using WinCC flexible software and supports alarm management, recipe handling, and trend display functions within its onboard memory capacity.

The OP 77B is widely used in manufacturing machinery, packaging equipment, conveyor systems, and process automation installations where a cost-effective, reliable operator interface is required. Its compact form factor and keypad-based operation make it suitable for environments where touchscreen panels are impractical, such as applications with gloved operators or high-vibration conditions. The panel is commonly found in automotive assembly lines, food and beverage processing, and general industrial machine control cabinets.

Technical Specifications

Display Type	Monochrome STN LCD
Display Size	4 inch
Display Colors	Monochrome (blue-mode)
Input/Operating Voltage	24 V DC
Power Consumption	Max. 6 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
Certifications	CE, UL, cULus
Configuration Software	WinCC flexible 2005 or higher
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the configured controller cannot be established or has been lost.
Check MPI or PROFIBUS DP cable connections and terminating resistors. Verify the PLC is powered and running. Confirm the MPI/PROFIBUS address settings match the project configuration.
Event ID: 10001: Connection to the PLC was interrupted during operation. The panel can no longer read or write process data.
Inspect the communication cable for damage. Check bus termination at both ends. Restart both the HMI panel and the PLC and monitor for recurrence.
Event ID: 20000: Project download error. The configuration data transfer from the engineering PC to the HMI panel failed or was interrupted.
Ensure WinCC flexible version is compatible with the panel firmware. Check the PC-to-panel transfer cable. Retry the download after restarting the panel in transfer mode.
Event ID: 40000: Illegal tag value detected. A process tag has received a value outside its configured limit range.
Check the PLC program for correct data scaling and limit values. Verify the tag configuration in WinCC flexible matches the PLC data types and address ranges.
Event ID: 70000: Recipe data error. A recipe record could not be read from or written to the PLC correctly.
Verify recipe tag addresses in the project configuration. Check that the PLC data blocks referenced by the recipe are correctly structured and accessible.
Event ID: 50000: System memory low. The HMI panel internal memory is approaching capacity, which may affect alarm logging or data recording.
Review and reduce the number of stored alarm entries or data logs. Optimize the project to reduce memory usage and re-download the configuration.
Event ID: 60000: Firmware update error. A firmware update process was interrupted or failed to complete successfully.
Restart the panel and reattempt the firmware update using the correct firmware version for the OP 77B. Ensure stable power supply during the update process.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B panel?

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 S7-1200 PLCs in certain configurations using appropriate protocol settings.

What software is required to configure the 6AV6355-1CA47-7CM2?

This panel is configured using Siemens WinCC flexible 2005 or a later version. The project is downloaded to the panel via a PC adapter cable connected to the MPI interface.

What is the supply voltage for this HMI panel?

The OP 77B requires a 24 V DC power supply. The permissible voltage range is typically 19.2 V DC to 28.8 V DC.

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

The front face of the panel is rated IP65, providing protection against dust and water jets. The rear of the unit is rated IP20.

Can the OP 77B display graphical images or trend curves?

The OP 77B supports basic trend display and bar graph representation within its monochrome display capabilities. Full graphical image display is limited due to the monochrome LCD and the keypad-based panel design.

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 DC range. Inspect the internal fuse if accessible.

Correct any undervoltage or overvoltage condition at the power supply. If the supply voltage is correct and the display remains blank, the internal power supply or LCD backlight may have failed and the unit should be sent for repair or replacement.

HMI panel shows 'No connection to PLC' or communication error message

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check bus termination resistors are enabled only at the two physical ends of the bus. Confirm the station address configured in the HMI project matches the panel's set address.

Replace or reseat the communication cable. Correct bus termination. Adjust the MPI or PROFIBUS address on the panel to match the project configuration and restart both devices.

Project download from PC to panel fails or times out

Check that the panel is set to transfer mode before initiating the download. Verify the PC adapter cable is correctly connected to the MPI port and that the correct COM port and transfer speed are selected in WinCC flexible.

Restart the panel and manually select transfer mode from the start screen. Ensure the WinCC flexible project is compiled without errors before attempting the download. Try a different PC adapter cable if the issue persists.

Function keys do not respond or produce incorrect actions

Check the project configuration in WinCC flexible to confirm the correct function key assignments are programmed. Inspect the membrane keypad surface for physical damage or contamination beneath the keys.

Re-download the project to ensure the latest key assignments are active on the panel. If individual keys are physically unresponsive, the membrane keypad assembly may need replacement.

Alarm messages are not displayed or are missing from the alarm list

Verify that alarm tags are correctly configured in WinCC flexible and that the corresponding PLC bit addresses are being set by the PLC program. Check that the alarm log memory has not reached its capacity limit.

Correct any misconfigured alarm tag addresses in the project. Clear the alarm log if it is full and re-download the project. Confirm the PLC program is correctly setting the alarm trigger bits.

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