Siemens 6AV6355-1CA47-7DM0 OP 177B

€ 554,45

SKU: 6AV6355-1CA47-7DM0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7DM0 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 keypad-based operation, enabling operators to monitor and control industrial processes directly at the machine. It is part of Siemens' established SIMATIC HMI portfolio, which is widely deployed across discrete and process manufacturing environments.

The OP 177B features a 5.7-inch STN display and supports both MPI and PROFIBUS DP communication interfaces, allowing seamless integration with SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel includes configurable function keys, a numeric/alphanumeric keypad, and supports WinCC flexible as its configuration software. It offers a compact, panel-mount design with an IP65 protection rating on the front face, making it suitable for installation in control cabinet doors exposed to dust and splash water.

The OP 177B is commonly used in machine building, automotive assembly lines, packaging machinery, and material handling systems where a robust, keypad-operated HMI is preferred over a touchscreen. Its compatibility with the SIMATIC S7 PLC family and support for PROFIBUS DP makes it a practical choice for integration into existing Siemens automation architectures. The panel is well-suited for applications requiring reliable operator input and process visualization in industrial environments.

Technical Specifications

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

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The panel cannot establish or maintain a connection to the configured controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect communication cables for damage or loose connectors. Check bus termination and cable shielding. Restart the HMI panel and verify PLC status.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel.
Verify the PC-to-panel communication cable is correctly connected. Check that the WinCC flexible project is compiled without errors and that the correct panel type is selected.
Event ID: 40000: System memory low. Available memory on the HMI device is insufficient to load or run the project.
Reduce the size of the HMI project by removing unused screens, images, or variables. Ensure no unnecessary background applications are running on the panel.
Event ID: 50000: Internal device error. A hardware or firmware fault has been detected within the panel.
Perform a panel restart. If the error persists, update the panel firmware using ProSave. If the fault continues, the unit may require hardware repair or replacement.
Event ID: 60000: Configuration error. The loaded project contains settings incompatible with the current panel firmware version.
Update the panel firmware to the version required by the WinCC flexible project. Alternatively, recompile the project targeting the installed firmware version and re-download.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6355-1CA47-7DM0)?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports connections to S7-1200 and third-party controllers via RS-422/485 in certain configurations.

What software is used to configure the OP 177B?

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

What is the front panel protection rating of the OP 177B?

The front face of the OP 177B carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets. The rear of the unit is rated IP20.

Can the OP 177B be used as a replacement for the OP 170B?

The OP 177B is the successor to the OP 170B and is generally compatible in terms of form factor and communication interfaces. However, the project configuration must be migrated and re-downloaded using WinCC flexible.

What is the supply voltage for the OP 177B?

The OP 177B operates on a 24 V DC supply voltage. Ensure the power supply can deliver sufficient current, as the panel consumes up to 9 W during normal operation.

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 to confirm supply integrity. Inspect the internal fuse if accessible.

Ensure the power supply is correctly wired and delivering 24 V DC. Replace any blown fuse with the correct rating. If the display backlight has failed, the panel may require backlight or display module replacement.

HMI panel shows 'No connection to PLC' message during operation

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 physical ends of the bus segment. Confirm the PLC node address matches the address configured in the WinCC flexible project.

Re-seat all communication connectors. Enable bus termination only at the two physical ends of the network. Correct any address mismatches in the HMI project and re-download the configuration.

Project download fails from WinCC flexible to the panel

Confirm the PC adapter (USB or MPI) is correctly installed and the COM port or USB driver is recognized by Windows. Check that the panel is in transfer mode and not running a project that blocks the download.

Place the panel in transfer mode via the Start Center menu. Reinstall the PC adapter driver if necessary. Ensure the WinCC flexible project targets the correct panel type and firmware version before initiating the transfer.

Touchscreen or keypad inputs are not responding correctly

For keypad issues, check for physical damage to the membrane keys. Verify the project configuration assigns the correct function to each key. For unresponsive keys, test each key individually in the panel's diagnostic mode.

Recalibrate the keypad assignments in the WinCC flexible project if functions are incorrectly mapped. If physical keys are damaged or stuck, the keypad membrane may need replacement. Clean the keypad surface to remove any contamination causing key sticking.

Panel repeatedly restarts or enters a boot loop

This may indicate a corrupted project file on the panel or a firmware issue. Attempt to access the Start Center during boot by pressing the appropriate key combination. Check if the panel boots successfully without a project loaded.

Delete the existing project from the panel using the Start Center and re-download a freshly compiled project from WinCC flexible. If the boot loop persists without a project, update the panel firmware using Siemens ProSave software via the MPI interface.

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