Siemens 6AV6355-1CA47-7HC4 OP 177B

€ 2.495,00

SKU: 6AV6355-1CA47-7HC4 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7HC4 is an operator panel belonging to the SIMATIC HMI OP 177B series, designed for machine-level human-machine interface applications. This unit is part of Siemens' established SIMATIC HMI product line and provides a compact, panel-mounted interface for monitoring and controlling industrial processes. The OP 177B series bridges the gap between basic text-based panels and full graphical touchscreen terminals.

The 6AV6355-1CA47-7HC4 features a 5.7-inch STN display capable of rendering both text and graphics, with a resolution of 320 x 240 pixels (QVGA) and support for 256 colors. The panel is equipped with a membrane keypad for operator input, including function keys and system keys, making it suitable for environments where touchscreen operation is impractical. It supports PROFIBUS DP and MPI communication interfaces for direct integration with Siemens SIMATIC S7 PLCs, and includes a USB port and RS-422/RS-485 serial interface. The unit operates on 24 V DC supply voltage and is configured using Siemens WinCC flexible engineering software.

The OP 177B is widely deployed in manufacturing, automotive, food and beverage, and packaging industries where a reliable, keypad-operated HMI is required at the machine level. Its robust construction and IP65 front protection rating make it suitable for installation in control cabinet doors exposed to dust and splash water. The panel's compatibility with the SIMATIC S7-200, S7-300, and S7-400 controller families makes it a versatile choice for a broad range of automation tasks.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	PROFIBUS DP, MPI, RS-422/RS-485, USB
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 mounting
Series/Product Family	SIMATIC HMI OP 177B
Certifications	CE, UL, cULus
Engineering Software	WinCC flexible 2005 or higher

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The connection to the controller has been interrupted or cannot be established.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Restart both the HMI and PLC if necessary.
Event ID: 10001: Timeout error on the communication link. The PLC did not respond within the configured timeout period.
Check network cabling and connector integrity. Verify PLC is in RUN mode and the configured station address is correct. Increase the timeout value in WinCC flexible if the network load is high.
Event ID: 20000: Tag read error. The HMI panel was unable to read a configured tag from the PLC.
Verify the tag address exists in the PLC program and the data block is not write-protected. Check that the PLC program has not been modified in a way that removes the referenced address.
Event ID: 20001: Tag write error. The HMI panel was unable to write a value to a configured PLC tag.
Confirm the target PLC address is writable and not protected. Check user authorization levels in the HMI project if operator permissions are configured.
Event ID: 40000: Project download error. A mismatch exists between the HMI firmware version and the WinCC flexible project version.
Update the HMI firmware to the version compatible with the WinCC flexible project, or recompile and re-download the project using a compatible software version.
Event ID: 70010: Internal device error or hardware fault detected on the HMI panel.
Perform a power cycle of the panel. If the error persists, back up the project, perform a factory reset, and reload the project. Contact Siemens support if the fault recurs.
Event ID: 60000: System memory low. The available runtime memory on the HMI panel is insufficient for the loaded project.
Reduce the complexity of the HMI project, decrease the number of simultaneously active screens or alarms, and re-download the optimized project to the panel.

Frequently Asked Questions

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

The OP 177B is configured using Siemens WinCC flexible, with WinCC flexible 2005 or later versions being compatible. The project is transferred to the panel via USB or the MPI/PROFIBUS interface.

Which Siemens PLCs are compatible with the 6AV6355-1CA47-7HC4?

The OP 177B supports direct communication with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It can also communicate with third-party controllers via the RS-422/RS-485 serial interface using supported protocols.

What is the front protection rating of this panel?

The front face of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets, suitable for installation in control cabinet doors.

Does the OP 177B support alarm logging and recipe management?

Yes, the OP 177B supports alarm logging, trend displays, and recipe management functions when configured through WinCC flexible, subject to the available project memory on the device.

What supply voltage does the 6AV6355-1CA47-7HC4 require?

The panel operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI devices and typically sourced from a dedicated 24 V DC power supply unit in the control cabinet.

Troubleshooting

Display remains blank after power is applied

Check that 24 V DC is present at the power supply terminals of the panel using a multimeter. Verify polarity is correct and the supply voltage is within the specified range.

If voltage is correct and the display remains off, perform a hard reset by holding the appropriate key combination during power-up. If the panel still does not start, the internal power supply board or backlight may require replacement.

HMI shows persistent communication error with the PLC

Verify the PROFIBUS or MPI cable is correctly wired and terminated. Check that the bus address configured in the HMI project matches the physical address set on the PLC. Use a PROFIBUS diagnostic tool to check bus integrity.

Replace or re-terminate the communication cable if faults are detected. Correct any address mismatches in the WinCC flexible project and re-download. Ensure only one active bus termination exists at each end of the cable.

Touchscreen or keypad inputs are not responding correctly

For keypad issues, inspect the membrane keypad connector on the PCB for corrosion or loose contact. Test individual keys using the panel's built-in service menu if accessible.

Clean the keypad connector contacts with isopropyl alcohol. If individual keys are non-functional due to membrane damage, the keypad membrane assembly should be replaced. For persistent issues, the main board may require inspection.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file or a firmware issue. Attempt to access the panel's loader/start center during boot by pressing the appropriate key combination to prevent the project from auto-starting.

Re-download a freshly compiled WinCC flexible project to the panel via USB. If the issue persists, perform a firmware update using the Siemens ProSave tool to restore the panel to a known-good firmware state.

Alarm messages are not displayed or are missing on the HMI screen

Check the alarm configuration in the WinCC flexible project to confirm the alarm tags are correctly mapped to PLC addresses. Verify the PLC program is setting the alarm bits as expected using a PLC monitoring tool.

Correct any tag address mismatches in the HMI project and re-download. Ensure the alarm view or alarm window object is correctly placed on the relevant HMI screens and that display filters are not hiding active alarms.

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