Siemens 6AV6355-1AA47-7EF1 OP 177B

€ 560,84

SKU: 6AV6355-1AA47-7EF1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7EF1 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 the SIMATIC HMI comfort and mobile panel lineage, it is engineered to integrate seamlessly with Siemens SIMATIC S7 controllers and third-party PLCs.

The OP 177B features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports up to 256 colors, providing clear visualization of process data. It is equipped with MPI/PROFIBUS DP and Ethernet (TCP/IP) communication interfaces, enabling flexible integration into existing automation networks. The panel includes 14 function keys with configurable LEDs, 512 KB user memory for project data, and supports configuration via Siemens WinCC flexible engineering software. The unit operates on a 24 V DC supply and carries an IP65 protection rating on the front face.

The OP 177B is widely deployed in manufacturing, automotive, food and beverage, and packaging industries where robust operator interface solutions are required at the machine level. Its combination of physical function keys and display-based navigation makes it suitable for environments where gloved operation or high-reliability key input is preferred over pure touchscreen interaction. The panel's compact form factor and broad PLC compatibility make it a practical choice for retrofitting older installations as well as new machine builds.

Technical Specifications

Display Size	5.7 inch
Display Resolution	320 x 240 pixels
Display Type	STN color LCD
Display Colors	256 colors
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 8 W
Communication Interface	MPI/PROFIBUS DP, Ethernet (TCP/IP)
User Memory	512 KB
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)
Function Keys	14 configurable function keys with LEDs
Mounting	Panel mounting
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 10000: Connection to PLC lost or communication timeout on MPI/PROFIBUS DP interface.
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC is powered and running. Check configured station address in WinCC flexible project.
Event ID: 10001: Connection to PLC established after a previous communication failure.
Informational event. No action required. Monitor for recurring disconnections which may indicate cable or network issues.
Event ID: 20000: Project download failed or project data corrupted in panel memory.
Re-download the WinCC flexible project to the panel. Check USB or Ethernet connection used for transfer. If problem persists, perform a memory reset via the panel's Start Center.
Event ID: 40000: Printer communication error or printer not responding.
Check printer cable connections and printer power. Verify printer driver settings in the WinCC flexible project configuration.
Event ID: 70010: Illegal tag address or tag configuration error detected in the project.
Review tag configuration in WinCC flexible. Ensure all tag addresses correspond to valid PLC data areas. Correct and re-download the project.
Event ID: 70011: Tag read/write error — the panel cannot read from or write to the configured PLC address.
Verify PLC program has the corresponding data blocks or memory areas defined. Check access permissions and data type compatibility between panel tags and PLC variables.
Event ID: 80001: System memory low — available panel memory is insufficient for current project or runtime operation.
Reduce project size by optimizing graphics and tag counts. Archive old alarm logs. Consider upgrading to a panel with greater memory capacity if project requirements exceed limits.
Event ID: 60000: Backup battery low or battery failure detected.
Replace the internal backup battery as soon as possible to prevent loss of retained data and real-time clock settings. Use the Siemens-specified replacement battery type.

Frequently Asked Questions

What communication interfaces does the OP 177B (6AV6355-1AA47-7EF1) support?

The OP 177B supports MPI and PROFIBUS DP interfaces as well as Ethernet (TCP/IP), allowing connection to SIMATIC S7 PLCs and third-party controllers. This makes it suitable for both legacy PROFIBUS-based systems and modern Ethernet networks.

Which engineering software is used to configure this panel?

The OP 177B is configured using Siemens WinCC flexible software. Projects created in WinCC flexible can be downloaded to the panel via Ethernet or USB connection.

What is the front panel protection rating of the 6AV6355-1AA47-7EF1?

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 typical industrial machine environments.

Can the OP 177B connect to non-Siemens PLCs?

Yes, the OP 177B supports communication with a range of third-party PLCs through its Ethernet and serial interfaces, provided the appropriate communication drivers are configured in WinCC flexible.

What is the operating voltage for this panel?

The 6AV6355-1AA47-7EF1 operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI panels and compatible with typical industrial control cabinet power supplies.

Troubleshooting

Display remains blank after power on

Check that 24 V DC supply voltage is present at the panel's power connector. Measure voltage at the terminal to confirm it is within the acceptable range. Inspect the power supply fuse and wiring.

Restore correct 24 V DC supply. If voltage is present but display remains blank, perform a hard reset by cycling power. If the panel still does not boot, the internal power supply board or display backlight may require replacement.

Panel shows 'No connection to PLC' or communication error on startup

Verify MPI/PROFIBUS DP or Ethernet cable is securely connected at both the panel and PLC ends. Check that the PLC station address configured in the WinCC flexible project matches the actual PLC address. Confirm the PLC is in RUN mode.

Correct any address mismatches in the WinCC flexible project and re-download. Replace damaged cables and ensure proper bus termination on PROFIBUS networks. For Ethernet, verify IP address settings on both panel and PLC.

Touchscreen or function keys not responding correctly

Check whether the issue is with specific keys or all input. For function keys, inspect for physical damage or debris under the keys. For display-related input issues, check if the panel requires a touchscreen calibration.

Perform a touchscreen recalibration via the panel's Start Center menu. Clean the front panel surface. If individual function keys are unresponsive after cleaning, the keypad membrane assembly may need replacement.

Project download fails or panel does not accept new project

Check the communication connection between the engineering PC and the panel (Ethernet or USB). Verify that the WinCC flexible project version is compatible with the panel firmware version. Check available memory on the panel.

Update panel firmware to match the WinCC flexible version if necessary. Free up panel memory by deleting old projects via the Start Center. Retry the download with a stable cable connection and ensure no firewall is blocking the transfer.

Real-time clock loses time after power off

The panel uses an internal backup battery to maintain the real-time clock when main power is removed. A loss of time after power cycling indicates the backup battery is depleted.

Replace the internal backup battery with the correct Siemens-specified type. After replacement, reset the date and time via the panel's system settings or through the WinCC flexible project configuration.

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