Siemens 6AV6355-1CA47-7DL4 OP 177B

€ 1.995,00

SKU: 6AV6355-1CA47-7DL4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7DL4 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level human-machine interface applications. This unit provides a compact yet capable panel solution for visualizing and controlling industrial processes. It is part of Siemens' established HMI portfolio and is configured for use with the WinCC flexible engineering software.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA) and supports 256 colors, providing clear process visualization. The panel includes a combination of touch and key operation, with function keys and a numeric/alphanumeric keypad for direct operator input. It supports MPI, PROFIBUS DP, and Ethernet (depending on variant) communication interfaces, enabling integration with SIMATIC S7 PLCs and other controllers. The unit operates on 24 V DC and offers onboard flash memory for project storage, along with a USB interface for data transfer and backup.

The OP 177B is widely deployed in machine building, manufacturing automation, and process control applications where a mid-range HMI panel is required. It is suitable for use in control cabinets and machine panels across industries such as automotive, food and beverage, packaging, and general factory automation. Its robust keypad design makes it particularly suited to environments where gloved operation or harsh conditions may limit the use of pure touchscreen panels.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN color LCD
Display Colors	256 colors
Touch Technology	Resistive touch + function keys
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 8 W
Communication Interface	MPI, PROFIBUS DP, RS-422/485
Memory	4 MB flash (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 panel)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Configuration error — the project loaded on the panel contains configuration inconsistencies or is incompatible with the firmware version.
Reload the project using WinCC flexible. Verify that the firmware version on the panel matches the version used during project compilation.
Event ID: 20000: Communication error — the panel cannot establish a connection to the configured PLC or controller.
Check MPI or PROFIBUS DP cabling and termination resistors. Verify the PLC address settings match the project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 40000: Tag read/write error — a process tag cannot be read from or written to the connected controller.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory address. Check communication link status and PLC program.
Event ID: 50000: System memory low — the panel's runtime memory is approaching capacity, which may affect performance.
Reduce the number of active screens or logged data. Archive or delete unnecessary data records from the panel memory.
Event ID: 60000: Backup battery low or missing — the internal buffer battery voltage is below the required threshold.
Replace the internal backup battery. Refer to the OP 177B operating instructions for the correct battery type and replacement procedure.
Event ID: 70000: Firmware update error — a firmware update process was interrupted or failed to complete successfully.
Restart the panel and reattempt the firmware update using ProSave or WinCC flexible. Ensure stable power supply during the update process.
Event ID: 80000: Screen saver or display fault — the display has failed to activate or deactivate correctly.
Check display backlight settings in the panel configuration. If the backlight has failed, the panel may require servicing or backlight replacement.

Frequently Asked Questions

Which engineering software is required to configure the OP 177B?

The OP 177B is configured using Siemens WinCC flexible (2004 or later). It is not compatible with the newer TIA Portal WinCC Advanced software.

What communication interfaces does the 6AV6355-1CA47-7DL4 support?

This panel supports MPI and PROFIBUS DP communication interfaces, allowing direct connection to SIMATIC S7-300 and S7-400 PLCs. RS-422/485 serial communication is also supported for third-party controller connectivity.

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

The OP 177B has limited compatibility with S7-1200 and S7-1500 PLCs. Communication is possible via PROFIBUS DP if the PLC is equipped with a suitable DP interface, but native Ethernet/PROFINET connectivity is not available on this panel variant.

What is the operating voltage for this panel?

The OP 177B operates on 24 V DC. Ensure the power supply is within the specified tolerance range to avoid panel faults or damage.

Can the OP 177B project be transferred via USB?

Yes, the OP 177B includes a USB interface that can be used for project transfer, firmware updates, and data backup using the ProSave tool or WinCC flexible.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals. Measure voltage at the panel connector and verify polarity. Check if the power LED is illuminated.

If voltage is correct but the display remains blank, the backlight inverter or backlight lamp may have failed. The panel should be sent for repair or the backlight assembly replaced. If no voltage is present, check the power supply unit and wiring.

Panel fails to communicate with the PLC

Verify MPI or PROFIBUS DP cable connections and check that bus termination resistors are correctly installed at both ends of the network. Confirm the PLC address configured in the project matches the actual PLC station address.

Correct any address mismatches in the WinCC flexible project and reload it to the panel. Replace damaged cables or connectors. Ensure only one active bus termination exists at each end of the segment.

Panel displays 'No project' or boots to the Start Center after power on

The panel flash memory may be empty or the project may have been deleted. This can occur after a firmware update or if the panel was reset to factory defaults.

Transfer the correct project to the panel using WinCC flexible or ProSave via the USB interface or MPI/PROFIBUS connection. Ensure the project is compiled without errors before transfer.

Touchscreen input is inaccurate or unresponsive

The resistive touchscreen may require recalibration. Access the panel's Start Center during boot and navigate to the touch calibration utility.

Perform a touchscreen recalibration from the Start Center settings menu. If the touchscreen remains unresponsive after calibration, the touch overlay may be damaged and require physical replacement.

Panel repeatedly restarts or shows a watchdog reset message

This may indicate a corrupted project file, insufficient power supply, or a hardware fault. Check the power supply for voltage drops under load and review the project for configuration errors.

Ensure the 24 V DC supply is stable and rated for sufficient current. Reload the project after recompiling in WinCC flexible. If restarts continue, perform a factory reset via the Start Center and reload the project. If the issue persists, the panel may require hardware servicing.

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