Siemens 6AV6355-1AA47-7BB3 OP 177B

SKU: 6AV6355-1AA47-7BB3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7BB3 is an operator panel belonging to the OP 177B series within the Siemens SIMATIC HMI family. This unit is a compact, panel-mounted operator panel designed for machine-level human-machine interface applications, providing both display and input functionality. It is part of the SIMATIC HMI Basic Panels generation and is intended for use with Siemens WinCC flexible or TIA Portal engineering software.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels (QVGA) and supports 256 colors, offering clear visualization of process data and operator screens. The panel includes a membrane keypad with function keys and system keys for navigation and control input. It supports MPI, PROFIBUS DP, and Ethernet communication interfaces, enabling integration into a wide range of Siemens PLC environments including S7-200, S7-300, and S7-400 controllers. The unit operates on 24 V DC supply voltage and is rated to IP65 on the front face for protection against dust and water ingress.

The OP 177B is widely deployed in manufacturing automation, machine tool control, packaging machinery, and process plant environments where a reliable and compact operator interface is required. Its compatibility with PROFIBUS DP and MPI makes it particularly suited for integration into existing Siemens-based control architectures. The panel is commonly found in industries such as automotive, food and beverage, and general factory automation where robust, panel-mount HMI solutions are needed at the machine level.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels (QVGA)
Display Type	STN LCD
Display Colors	256 colors
Input Method	Membrane keypad with function keys
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP, Ethernet (RJ45)
IP Protection Rating (Front)	IP65
IP Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
Series/Product Family	SIMATIC HMI OP 177B
Engineering Software	WinCC flexible 2008 / TIA Portal
Certifications	CE, UL, cULus

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the configured PLC controller. The connection to the PLC has been interrupted or cannot be established.
Check MPI/PROFIBUS DP or Ethernet cable connections and termination resistors. Verify PLC address settings and communication parameters in WinCC flexible project configuration.
Event ID: 10001: Connection to the PLC was established but has since been lost during operation.
Inspect physical communication wiring for damage or loose connectors. Check PLC operating state and ensure the PLC program is running. Verify baud rate and station address settings.
Event ID: 20000: Project download error. The project could not be transferred to the HMI panel successfully.
Verify the transfer cable connection and PC communication settings. Ensure the panel is in transfer mode before initiating download. Check available memory on the panel.
Event ID: 40000: System memory low. The available runtime memory on the panel is insufficient for the loaded project.
Reduce the size of the HMI project by optimizing screens, images, and scripts. Perform a full project download after optimization to clear fragmented memory.
Event ID: 50000: Configuration error detected in the loaded project. A tag or screen reference in the project is invalid or missing.
Open the project in WinCC flexible, check for compilation errors, correct any invalid tag references or missing screen links, and re-download the project to the panel.
Event ID: 70000: Operating system or firmware error. The panel firmware version is incompatible with the loaded project version.
Update the panel firmware to the version required by the WinCC flexible project. Use the ProSave tool or WinCC flexible to perform the firmware update via the communication interface.
Event ID: 30000: Backup or restore operation failed during project or data transfer.
Ensure sufficient storage capacity on the target medium. Retry the backup or restore operation. If the issue persists, perform a factory reset and re-download the project.

Frequently Asked Questions

What communication interfaces does the OP 177B 6AV6355-1AA47-7BB3 support?

The OP 177B supports MPI, PROFIBUS DP, and Ethernet (RJ45) communication interfaces, allowing connection to Siemens S7-200, S7-300, and S7-400 PLCs as well as third-party controllers via appropriate drivers.

What engineering software is required to configure this HMI panel?

The panel is configured using Siemens WinCC flexible 2008 or the TIA Portal engineering environment. Projects are downloaded to the panel via MPI, PROFIBUS, Ethernet, or USB connection.

What is the supply voltage for the 6AV6355-1AA47-7BB3?

The panel operates on a 24 V DC supply voltage, which is the standard supply used across the SIMATIC HMI Basic Panel range.

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

The front face of the OP 177B is rated to IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for panel-mount installation in industrial environments.

Is the OP 177B compatible with Siemens S7-1200 or S7-1500 PLCs?

The OP 177B has limited compatibility with S7-1200 and S7-1500 PLCs and is primarily designed for use with S7-200, S7-300, and S7-400 controllers. For S7-1200 and S7-1500 applications, Siemens recommends using newer SIMATIC Basic Panel or Comfort Panel generations.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check that the supply is within the specified tolerance. Inspect the panel for any visible damage to the connector or internal fuse.

Ensure the 24 V DC supply is stable and correctly wired. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight may have failed and the unit should be sent for repair or replacement.

HMI panel shows 'No connection to PLC' message on screen

Verify the communication cable type and wiring between the HMI and PLC. Check the MPI or PROFIBUS address configured in the WinCC flexible project matches the PLC station address. Inspect cable termination resistors at both ends of the bus.

Correct any address mismatches in the project configuration and re-download. Replace damaged communication cables. Ensure bus termination is correctly applied at both ends of the PROFIBUS or MPI network.

Project download fails or transfer does not start

Confirm the panel is set to transfer mode (accessible via the Start Center or loader menu on the panel). Check the communication cable connection between the PC and the panel. Verify the correct communication port and settings are selected in WinCC flexible.

Switch the panel to transfer mode manually before initiating the download. Use a known-good MPI or Ethernet cable. If using Ethernet, ensure the PC and panel are on the same subnet. Retry the download after correcting settings.

Touchscreen or keypad inputs are not responding correctly

Check whether the issue is with specific keys or all inputs. For membrane keypads, inspect for physical damage, contamination, or worn key surfaces. Verify the project configuration for correct key assignments.

Clean the keypad surface and inspect for physical damage. If specific keys are unresponsive due to membrane wear, the keypad overlay or front panel assembly may need replacement. Recalibrate or verify key assignments in the WinCC flexible project if inputs are mapped incorrectly.

Panel repeatedly restarts or enters an error loop after project load

Check the project for memory overload or corrupted project data. Review the system event log on the panel for specific event IDs. Verify that the firmware version on the panel is compatible with the WinCC flexible project version used.

Perform a factory reset of the panel using the ProSave tool or the panel loader menu. Update the firmware to the correct version and re-download a freshly compiled project from WinCC flexible. Ensure the project does not exceed the panel memory limits.

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