Siemens 6AV6355-1AA47-7FA2 OP 177B

€ 1.995,00

SKU: 6AV6355-1AA47-7FA2 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7FA2 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 touch and key-based operation, serving as a compact yet capable panel for process visualization and control. As part of Siemens' established SIMATIC HMI portfolio, the OP 177B is engineered for reliable performance in industrial environments.

The 6AV6355-1AA47-7FA2 features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports both touch screen and membrane keypad input, offering flexible operator interaction. It communicates via MPI, PROFIBUS DP, and RS-422/485 interfaces, enabling seamless integration with SIMATIC S7 PLCs and other compatible controllers. The panel includes 512 KB user memory for project data, supports alarm management, recipe handling, and trend displays, and is configured using WinCC flexible or STEP 7 engineering software.

The OP 177B is widely deployed in manufacturing automation, machine tool control, packaging machinery, and process plant environments where a compact, robust operator interface is required. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 PLC families makes it a versatile choice for both new installations and system upgrades. The panel's rugged front face and IP65-rated protection make it suitable for installation in control cabinet doors exposed to dust and moisture.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	256 colors
Touch Technology	Resistive touchscreen with membrane keypad
Input/Operating Voltage	24 V DC
Power Consumption	Max. 9 W
Communication Interface	MPI, PROFIBUS DP, RS-422/485
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/Protection Rating	IP65 (front), IP20 (rear)
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes & System Events

Event ID: 10000: Connection to PLC interrupted or communication timeout occurred.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC is powered and in RUN mode. Check configured communication parameters in WinCC flexible.
Event ID: 10001: No connection to configured PLC address.
Verify the MPI or PROFIBUS address configured on the HMI matches the PLC address. Check network topology and cable integrity.
Event ID: 20000: Project download failed or project data corrupted.
Re-download the project from WinCC flexible. Ensure the correct communication interface and baud rate are selected during transfer.
Event ID: 40000: Tag read/write error — the configured PLC tag could not be accessed.
Check that the tag address exists in the PLC program. Verify data block numbers and variable addresses match the HMI configuration.
Event ID: 50000: Alarm buffer overflow — too many alarms generated in a short period.
Review alarm configuration and reduce polling frequency if necessary. Acknowledge and clear pending alarms on the panel.
Event ID: 70000: Recipe data error — recipe record could not be read or written.
Check recipe configuration in WinCC flexible. Verify sufficient user memory is available and that PLC tag addresses for recipe variables are correct.
Event ID: 3000: Operating system error or internal device fault detected.
Perform a power cycle on the panel. If the fault persists, perform a factory reset and re-download the project. Contact Siemens support if the issue recurs.

Frequently Asked Questions

Which PLCs are compatible with the Siemens 6AV6355-1AA47-7FA2 OP 177B?

The OP 177B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports communication with S5 controllers and third-party devices via RS-422/485.

What software is used to configure and program the OP 177B?

The OP 177B is configured using Siemens WinCC flexible (2004 or later) or STEP 7 Micro/WIN for S7-200 applications. Projects are downloaded to the panel via MPI, PROFIBUS, or a PC/PPI cable.

What is the display type and resolution of the 6AV6355-1AA47-7FA2?

This unit features a 5.7-inch STN LCD with a resolution of 320 x 240 pixels (QVGA) and supports up to 256 colors.

What is the supply voltage for the OP 177B?

The OP 177B requires a 24 V DC power supply, with a maximum power consumption of approximately 9 W.

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, suitable for installation in control cabinet doors.

Troubleshooting

Display remains blank after power on

Measure 24 V DC at the power supply terminals on the rear of the panel. Check the supply cable and connector for damage or loose connections.

Restore correct 24 V DC supply. If voltage is present but display remains off, the internal power supply board or backlight inverter may be faulty and requires replacement.

HMI shows 'No connection to PLC' message on startup

Verify MPI or PROFIBUS cable is securely connected at both the HMI and PLC ends. Check that bus termination resistors are correctly placed at both ends of the network.

Correct any wiring faults and ensure termination is applied. Confirm that the MPI/PROFIBUS address and baud rate in the HMI project match the PLC configuration. Re-download the project if settings were changed.

Touchscreen does not respond or responds inaccurately

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

Clean the screen surface with a soft, dry cloth. Perform a touchscreen calibration from the Control Panel menu. If calibration fails repeatedly, the touchscreen overlay may need replacement.

Project download fails or transfer is interrupted

Check the communication cable between the PC and the HMI panel. Verify the correct COM port and transfer settings are selected in WinCC flexible.

Replace the PC/MPI or USB adapter cable if faulty. Ensure no other application is using the COM port. Set the HMI to transfer mode manually via the Start Center before initiating the download.

Panel repeatedly restarts or freezes during operation

Check the 24 V DC supply for voltage drops or ripple under load. Inspect the project for memory overuse or excessive tag polling rates.

Stabilize the power supply and ensure it meets the panel's current requirements. Optimize the WinCC flexible project by reducing update cycles and tag counts. Perform a firmware update if an outdated version is suspected.

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