Siemens 6AV6355-1CA47-7EM1 OP 177B

€ 1.338,50

SKU: 6AV6355-1CA47-7EM1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7EM1 is an Operator Panel (OP 177B) belonging to the SIMATIC HMI series, designed for machine-level visualization and operator control tasks. This unit is part of the OP 177B product family, which offers a compact panel solution for demanding industrial environments. It serves as a human-machine interface, enabling operators to monitor process values, trigger actions, and display alarms and messages.

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 visualization of process data. The panel is equipped with a touch screen and function keys, offering flexible input options for operators. It supports PROFIBUS DP and MPI communication interfaces, enabling direct connection to Siemens S7-200, S7-300, and S7-400 PLCs. The unit operates on a 24 V DC supply and is rated to IP65 on the front face, making it suitable for panel-mount installations in environments where dust and water ingress are a concern.

The OP 177B is widely used in manufacturing, automotive, food and beverage, and packaging industries where a reliable and compact HMI solution is required at the machine level. Its compatibility with the SIMATIC S7 controller family and support for WinCC flexible configuration software make it a practical choice for OEMs and system integrators building standardized machine control panels. The panel cutout dimensions and mounting design allow straightforward integration into standard control cabinets and machine enclosures.

Technical Specifications

Display Size	5.7 inch
Display Type	STN color
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen with membrane function keys
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 6 W
Communication Interface	PROFIBUS DP, MPI
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
Series/Product Family	SIMATIC HMI OP 177B
Configuration Software	WinCC flexible 2005 or higher

Common Error Codes & System Events

Event ID: 10000: Communication error between HMI panel and PLC. The configured connection to the controller cannot be established or has been lost.
Check PROFIBUS/MPI cable connections and termination resistors. Verify the PLC address and baud rate settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC interrupted during runtime. The HMI lost communication with the configured controller.
Inspect physical cabling for damage or loose connectors. Verify bus termination at both ends of the PROFIBUS segment. Check for address conflicts on the bus.
Event ID: 20000: Project download error. The project transfer from the configuration PC to the HMI panel failed.
Verify the transfer cable is correctly connected. Ensure the HMI is in transfer mode. Check that the WinCC flexible project is compatible with the OP 177B firmware version.
Event ID: 40000: System memory low. Available memory on the HMI panel is insufficient to load or run the configured project.
Reduce the project size by removing unused screens, images, or variables. Ensure no unnecessary background applications are running. Consider archiving historical data externally.
Event ID: 50000: Firmware update error. The firmware update process was interrupted or failed to complete successfully.
Restart the firmware update procedure from the beginning using the correct firmware version for the OP 177B. Ensure stable power supply during the update process.
Event ID: 60000: Tag read/write error. The HMI panel was unable to read from or write to a configured PLC tag.
Verify the PLC tag address and data type match the HMI variable configuration. Check that the PLC program is running and the data block or memory area is accessible.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms has exceeded the buffer capacity of the HMI panel.
Acknowledge and clear existing alarms. Review the alarm configuration to reduce the frequency of alarm triggers. Increase the alarm buffer size in the WinCC flexible project settings if possible.

Frequently Asked Questions

Which PLCs are compatible with the Siemens 6AV6355-1CA47-7EM1 OP 177B?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with other controllers supported by WinCC flexible drivers.

What configuration software is required for the OP 177B?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. Projects are transferred to the panel via a PC adapter cable connected to the MPI/PROFIBUS port.

What is the display type and resolution of the OP 177B?

The OP 177B features a 5.7-inch STN color display with a resolution of 320 x 240 pixels (QVGA) and supports 256 colors.

What is the IP protection rating of the OP 177B?

The front face of the OP 177B is rated IP65, providing protection against dust and water jets. The rear of the unit is rated IP20.

Can the OP 177B be used as a replacement for older Siemens OP panels?

The OP 177B is designed as a successor to earlier SIMATIC OP panels such as the OP 17 and OP 27. Migration projects can be created in WinCC flexible to adapt existing configurations for use on the OP 177B.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check for the presence of the backlight by shining a torch at the display surface to detect a faint image.

If supply voltage is correct but display is blank, the backlight may have failed. Replace the backlight unit or the display assembly. If no voltage is present, check the power supply and wiring to the panel.

HMI panel does not communicate with the PLC

Verify the PROFIBUS or MPI cable is correctly connected and that bus termination resistors are active at both ends of the segment. Check the station address configured in the HMI project matches the physical address set on the panel.

Correct any address mismatches in the WinCC flexible project or on the panel. Replace damaged cables or connectors. Ensure the baud rate is consistent across all devices on the bus segment.

Touchscreen does not respond or responds inaccurately

Attempt to recalibrate the touchscreen via the panel's system settings menu. Check for physical damage or contamination on the screen surface.

Perform a touchscreen calibration from the Control Panel menu on the OP 177B. Clean the screen surface with a soft, dry cloth. If calibration does not resolve the issue, the touchscreen overlay may need replacement.

Project transfer from PC to HMI panel fails

Confirm the panel is set to transfer mode and that the correct communication interface and baud rate are selected in WinCC flexible transfer settings. Check the PC adapter cable connection.

Set the OP 177B to transfer mode via the Start Center menu. Verify the PC adapter driver is correctly installed and the COM port or USB adapter is recognized by the PC. Retry the transfer with a known-good cable.

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

The internal flash memory may have been corrupted, or the project was not successfully transferred and stored on the panel.

Re-transfer the WinCC flexible project to the panel ensuring the transfer completes without interruption. After transfer, verify the project is set to start automatically on power-up in the panel's Start Center settings.

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