Siemens 6AV6355-1CA47-7ET2 OP 177B

€ 588,50

SKU: 6AV6355-1CA47-7ET2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7ET2 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a monochrome or color display with touch and key-based operation, serving as a compact and robust panel for process visualization and control. As part of the SIMATIC HMI Mobile/Comfort predecessor lineup, it is engineered for integration into Siemens-based automation environments.

The OP 177B features a 5.7-inch STN display and supports both MPI/PROFIBUS DP and Ethernet communication interfaces, enabling flexible connectivity to SIMATIC S7 PLCs and other controllers. It is configured using WinCC flexible engineering software and supports recipe management, alarm logging, and trend display functions. The panel operates on 24 V DC supply and is rated IP65 on the front face, making it suitable for panel-mount installations in industrial enclosures.

The OP 177B is widely deployed in manufacturing, automotive, food and beverage, and process industries where a compact, reliable operator interface is required at the machine level. Its compatibility with SIMATIC S7-300 and S7-400 controllers via MPI or PROFIBUS DP makes it a common choice for retrofitting and upgrading existing Siemens automation systems. The panel's robust construction and broad communication support make it well-suited for demanding production environments.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Display Resolution	320 x 240 px (QVGA)
Touch Technology	Resistive touchscreen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 12 W
Communication Interface	MPI/PROFIBUS DP, RS-422/RS-485, Ethernet (RJ45)
Memory	512 KB user memory
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), IP20 (rear)
Mounting	Panel mount
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC or controller.
Check MPI/PROFIBUS DP or Ethernet cable connections. Verify PLC address settings and communication parameters in WinCC flexible project configuration.
Event ID: 10001: Connection to the configured PLC has been lost or cannot be established.
Verify PLC is powered and running. Check network address, baud rate, and cable integrity. Restart the HMI panel after correcting configuration.
Event ID: 20000: Project download error or project data is corrupted on the panel.
Re-download the WinCC flexible project to the panel via Ethernet or MPI. Ensure the project version matches the panel firmware version.
Event ID: 40000: Internal system error or firmware fault detected.
Perform a panel reset. If the error persists, update the panel firmware using ProSave or WinCC flexible and re-download the project.
Event ID: 50000: Alarm buffer overflow — too many alarms generated in a short period.
Review and optimize alarm configuration in the WinCC flexible project. Acknowledge and clear pending alarms on the panel.
Event ID: 70000: Recipe data error — recipe records cannot be read or written correctly.
Check recipe configuration in the WinCC flexible project. Verify available user memory on the panel and re-download recipe data if necessary.
Event ID: 110000: Screensaver or backlight timeout has activated, panel appears blank.
Touch the screen or press any key to reactivate the display. Adjust screensaver timeout settings in the panel configuration if needed.

Frequently Asked Questions

What communication interfaces does the OP 177B (6AV6355-1CA47-7ET2) support?

The OP 177B supports MPI, PROFIBUS DP, RS-422/RS-485, and Ethernet (RJ45) interfaces, allowing connection to SIMATIC S7-300, S7-400, and other compatible controllers.

Which engineering software is used to configure this panel?

The OP 177B is configured using Siemens WinCC flexible software. Projects are downloaded to the panel via Ethernet or MPI connection.

What is the supply voltage for the 6AV6355-1CA47-7ET2?

The panel operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI panels in this series.

Is the OP 177B compatible with SIMATIC S7-1200 or S7-1500 PLCs?

The OP 177B was primarily designed for use with S7-300 and S7-400 PLCs via MPI or PROFIBUS DP. Connectivity to S7-1200 or S7-1500 may be possible via Ethernet but is not the primary intended configuration, and compatibility should be verified in WinCC flexible.

What is the front panel protection rating of this unit?

The front panel of the OP 177B is rated IP65, making it resistant to dust ingress and low-pressure water jets, suitable for panel-mount installation in industrial environments.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the power supply is within specification and the connector is firmly seated. Check if the backlight has simply timed out due to the screensaver setting.

Restore correct 24 V DC supply. If the backlight has timed out, press any key or touch the screen. If the display remains blank with correct power supply, the backlight or internal power board may require replacement.

HMI panel fails to communicate with the PLC

Verify MPI or PROFIBUS DP address settings on both the panel and the PLC. Check cable connections and termination resistors on the PROFIBUS network. Confirm baud rate settings match between devices.

Correct address and baud rate settings in the WinCC flexible project and re-download. Replace or reseat communication cables. Ensure proper bus termination at both ends of the PROFIBUS segment.

Panel displays 'No project' or fails to load the project after startup

The user memory may be corrupted or the project may not have been successfully downloaded. Connect a PC with WinCC flexible and attempt to re-download the project.

Re-download the WinCC flexible project to the panel using a valid Ethernet or MPI connection. If memory corruption is suspected, perform a factory reset via the panel's Start Center and re-download the project and firmware.

Touchscreen does not respond accurately or is misaligned

The resistive touchscreen may require recalibration. Access the panel's Start Center during boot by pressing the appropriate key sequence to enter the calibration utility.

Perform a touchscreen calibration from the panel's Start Center or Control Panel settings. If calibration does not resolve the issue, the touchscreen overlay may be damaged and require physical replacement.

Panel repeatedly restarts or crashes during operation

Check the 24 V DC supply for voltage fluctuations or ripple. Review the project for memory overload or excessive alarm generation. Check for firmware compatibility issues between the panel and the WinCC flexible project version.

Stabilize the power supply and ensure it meets the panel's current requirements. Optimize the WinCC flexible project to reduce memory usage. Update the panel firmware to the latest compatible version using ProSave.

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