Siemens 6AV6355-1AA47-7EK0 OP 177B

€ 1.722,53

SKU: 6AV6355-1AA47-7EK0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7EK0 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 interface for process visualization, operator control, and status monitoring in industrial environments. As part of the SIMATIC HMI comfort and mobile panel lineage, it integrates directly with Siemens SIMATIC S7 controllers and third-party PLCs via standard communication protocols.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports both MPI/PROFIBUS DP and Ethernet (PROFINET) communication interfaces, enabling flexible integration into existing automation networks. The panel is configured using WinCC flexible engineering software and supports function keys for operator input alongside a membrane keypad. It offers onboard flash memory for project storage and operates on a 24 V DC supply, with a protection rating suitable for front-panel installation in control cabinets.

The OP 177B is widely deployed in manufacturing, process automation, and machine building industries where a compact, robust operator interface is required. It is commonly found on packaging machinery, conveyor systems, and general-purpose industrial machines where operators need to monitor process values, acknowledge alarms, and adjust setpoints. Its compatibility with the SIMATIC S7-300 and S7-400 controller families makes it a standard choice for Siemens-based automation architectures.

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	MPI/PROFIBUS DP, Ethernet (PROFINET)
Configuration Software	WinCC flexible 2008 or later
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 the HMI panel and the connected PLC. The panel cannot establish or maintain a connection to the controller.
Check MPI/PROFIBUS DP or Ethernet cable connections. Verify the PLC address and communication parameters configured in WinCC flexible match the controller settings. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the configured PLC was interrupted during runtime operation.
Inspect physical communication cables for damage. Check network topology and termination resistors on PROFIBUS segments. Restart both the HMI panel and the PLC if the connection does not recover automatically.
Event ID: 20000: Project download error. The project could not be transferred to the HMI panel successfully.
Verify the transfer cable or network connection between the engineering PC and the panel. Ensure WinCC flexible version is compatible with the panel firmware. Check available flash memory on the device.
Event ID: 40000: Internal device error or hardware fault detected on the operator panel.
Perform a power cycle on the device. If the error persists, check for firmware corruption and attempt a firmware update via WinCC flexible. Contact Siemens technical support or arrange for panel repair/replacement if the fault remains.
Event ID: 50000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms in the alarm view. Review the alarm configuration in WinCC flexible to reduce unnecessary alarm triggers or increase the alarm buffer size in the project settings.
Event ID: 70000: Tag update error. One or more configured tags cannot be read from or written to the PLC.
Verify PLC tag addresses in the WinCC flexible project match the actual PLC data block or memory addresses. Check that the PLC program is running and the relevant data areas are accessible.
Event ID: 80000: System memory low warning. Available runtime memory on the HMI panel is critically low.
Reduce the number of active screens, animations, or logged data in the project. Archive or clear historical data logs stored on the device. Consider optimizing the WinCC flexible project to reduce memory usage.

Frequently Asked Questions

What communication interfaces does the OP 177B (6AV6355-1AA47-7EK0) support?

The OP 177B supports MPI, PROFIBUS DP, and Ethernet (PROFINET) communication interfaces, allowing connection to SIMATIC S7-200, S7-300, and S7-400 PLCs as well as third-party controllers via these protocols.

Which engineering software is required to configure this HMI panel?

The OP 177B is configured using Siemens WinCC flexible 2008 or a compatible later version. Projects are created on a PC and downloaded to the panel via Ethernet or MPI/PROFIBUS connection.

What is the supply voltage for the 6AV6355-1AA47-7EK0?

The panel operates on a 24 V DC supply voltage. Ensure a stable, regulated 24 V DC power source is used to avoid operational issues.

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

The front panel of the OP 177B carries an IP65 protection rating, making it suitable for installation in environments where dust and water spray may be present.

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

The OP 177B has limited compatibility with S7-1200 and S7-1500 controllers and is primarily designed for use with S7-300 and S7-400 families. For S7-1200/1500 projects, Siemens recommends using newer SIMATIC HMI panels configured with TIA Portal.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel's power connector. Check that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Restore the 24 V DC supply to the correct level. If the supply is correct and the display remains blank, the backlight or internal power supply board may have failed and the unit should be sent for repair or replacement.

HMI panel fails to communicate with the PLC

Verify the physical connection of the MPI, PROFIBUS DP, or Ethernet cable. Check the communication parameters (station address, baud rate, IP address) configured in the WinCC flexible project against the PLC settings.

Correct any mismatched communication parameters in WinCC flexible and re-download the project. Replace damaged cables and ensure PROFIBUS termination resistors are correctly placed at both ends of the bus segment.

Touchscreen or function keys not responding

Check whether the panel is in transfer mode, which disables normal operation. Inspect the keypad membrane for physical damage or contamination.

Exit transfer mode by cycling power or pressing the appropriate key combination. If keys are physically damaged or unresponsive after cleaning, the membrane keypad assembly requires replacement.

Project cannot be downloaded to the panel

Confirm the panel is in transfer mode and the correct communication interface is selected in WinCC flexible. Check that the PC and panel are connected via the appropriate cable or network.

Set the panel to transfer mode via the Start Center menu. Ensure the WinCC flexible project settings match the panel type and firmware version. Update panel firmware if a version mismatch is detected.

Alarms are not displayed or acknowledged on the panel

Check the alarm configuration in WinCC flexible, including the PLC bit addresses assigned to alarm triggers. Verify that the PLC is setting the correct alarm bits and that the panel is communicating with the PLC.

Correct the alarm tag addresses in the WinCC flexible project to match the PLC program. Re-download the project and test alarm triggering from the PLC side to confirm correct operation.

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