Siemens 6AV6355-1AA47-7EM5 OP 177B

€ 1.141,69

SKU: 6AV6355-1AA47-7EM5 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7EM5 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' SIMATIC HMI product line and provides a compact, panel-mounted display solution for monitoring and controlling industrial processes. The OP 177B series offers both monochrome and color display variants, with this part number corresponding to a color STN display configuration.

The OP 177B features a 5.7-inch color STN display with a resolution of 320 x 240 pixels (QVGA) and supports touch and key-based operation through integrated function keys. It is equipped with MPI/PROFIBUS DP and RS-422/RS-485 interfaces for communication with Siemens S7-200, S7-300, and S7-400 PLCs, as well as third-party controllers. The panel operates on 24 V DC supply voltage and includes 512 KB of user memory for project data, with support for external memory cards for project transfer and data logging. Configuration is performed using Siemens WinCC flexible software.

The OP 177B is widely deployed in machine building, packaging machinery, conveyor systems, and process automation applications where a robust, mid-range HMI panel is required. Its compatibility with the SIMATIC S7 controller family makes it a standard choice for OEMs integrating Siemens automation architectures. The panel's IP65 front protection rating makes it suitable for installation in industrial enclosures exposed to dust and water splash.

Technical Specifications

Display Size	5.7 inch
Display Type	Color 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	MPI/PROFIBUS DP, RS-422/RS-485
User Memory	512 KB
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
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

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 MPI/PROFIBUS DP 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 operation. The HMI panel has lost communication with the configured controller.
Inspect the communication cable for damage or loose connectors. Check bus termination at both ends of the PROFIBUS/MPI segment. Restart both the HMI panel and the PLC if the connection is not restored automatically.
Event ID: 20000: Project download error. The project transfer from the configuration PC to the HMI panel has failed or been interrupted.
Verify the transfer cable connection and PC interface settings. Ensure WinCC flexible is set to the correct transfer mode and the panel is in transfer mode. Check available memory on the panel before retrying the download.
Event ID: 40000: Tag read error. The HMI panel cannot read the value of a configured tag from the PLC.
Confirm the PLC data block or memory address referenced by the tag exists and is accessible. Check that the data type configured in the HMI project matches the PLC variable type. Verify communication is active.
Event ID: 40001: Tag write error. The HMI panel cannot write a value to the configured PLC tag.
Check that the target PLC address is not write-protected. Confirm the PLC is in RUN mode and accepting write commands. Verify the tag address and data type in the WinCC flexible project.
Event ID: 50000: System memory low. The available runtime memory on the HMI panel is insufficient to execute the current project.
Reduce the complexity of the HMI project by limiting the number of active screens, alarms, or data logs. Transfer an optimized project to the panel. Consider using an external memory card for data logging to free internal memory.
Event ID: 60000: Internal device error or hardware fault detected on the HMI panel.
Perform a panel restart. If the error persists, perform a factory reset and re-transfer the project. If the fault remains after reset, the panel may require hardware repair or replacement.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP. It also supports communication with third-party controllers via the RS-422/RS-485 interface using appropriate drivers in WinCC flexible.

What software is required to configure the OP 177B?

The OP 177B is configured using Siemens WinCC flexible software. The project is then transferred to the panel via a PC adapter cable connected to the MPI interface or via a memory card.

What is the supply voltage for the 6AV6355-1AA47-7EM5?

The panel 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.

Does the OP 177B support external memory cards?

Yes, the OP 177B supports external MMC (MultiMediaCard) memory cards, which can be used for project transfer, recipe data storage, and data logging without requiring a PC connection.

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

The front panel 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.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check that polarity is correct and voltage is within the specified range. Inspect the internal fuse if accessible.

Correct any wiring errors or supply voltage issues. If the supply voltage is confirmed correct and the display remains blank, the internal power supply board or backlight inverter may be faulty and require repair or replacement.

HMI panel fails to communicate with the S7 PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check the bus address configured on the HMI matches the project settings and does not conflict with other nodes on the bus.

Replace or reseat the communication cable. Correct the bus address and baud rate settings in the WinCC flexible project and re-download. Ensure termination resistors are active only at the two physical ends of the bus segment.

Touchscreen or function keys not responding

Check whether the panel is in transfer mode, which disables normal operation. Perform a calibration check on the touch interface via the panel's start center menu if accessible.

Exit transfer mode and return to runtime mode. Recalibrate the touch screen through the panel's system settings. If keys remain unresponsive after calibration, the touch overlay or keypad membrane may require replacement.

Project transfer from PC fails repeatedly

Confirm the panel is set to transfer mode and the PC adapter is correctly connected to the MPI port. Check the PC's COM port or USB adapter settings and ensure the correct transfer interface is selected in WinCC flexible.

Try a different PC adapter cable or USB-to-MPI adapter. Verify the baud rate on the PC matches the panel's MPI settings. If transfer still fails, perform a factory reset on the panel using the start center and retry the transfer.

Alarm messages displayed in incorrect language or garbled text

Check the language settings configured in the WinCC flexible project and verify the correct language is activated in the runtime settings on the panel.

Re-download the project with the correct language configuration selected. Ensure the font used in the project supports the required character set. Verify the runtime language switching logic in the project if multiple languages are configured.

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