Siemens 6AV6355-1CA47-7BB8 OP 177B

€ 2.995,00

SKU: 6AV6355-1CA47-7BB8 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BB8 is an operator panel belonging to the SIMATIC HMI OP 177B series, part of Siemens' established line of panel-based human-machine interface devices. This unit provides a combined keypad and display interface for machine-level operator control and monitoring, designed for integration into industrial control cabinets and machinery. The OP 177B series sits within the SIMATIC HMI family and is engineered for demanding industrial environments requiring reliable process visualization.

The OP 177B features a 5.7-inch STN display capable of rendering graphics and text for process visualization, paired with a membrane keypad for operator input. It supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to Siemens S7-200, S7-300, and S7-400 PLCs without additional hardware. The panel operates on 24 V DC supply voltage and is configured using Siemens WinCC flexible engineering software. Onboard memory supports project storage and recipe management, and the unit carries an IP65 protection rating on the front face for resistance to dust and water ingress.

The OP 177B is widely deployed in machine automation, packaging machinery, conveyor systems, and process plant equipment across manufacturing and process industries. Its keypad-based input makes it suitable for environments where touchscreen operation is impractical due to gloves, contamination, or vibration. The combination of PROFIBUS DP connectivity and robust construction makes it a practical choice for retrofitting or replacing older operator panels in existing Siemens-based control systems.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Colors	256 colors
Input Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP, RS-422/485
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)
Engineering Software	WinCC flexible 2005 or higher
Mounting	Panel mounting
Certifications	CE, UL, cULus
Series/Product Family	SIMATIC HMI OP 177B

Common Error Codes and System Events

Event ID: 10000: Communication error between the HMI panel and the connected PLC. The configured connection cannot be established or has been interrupted.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Confirm the PLC is powered and in RUN mode.
Event ID: 10001: Connection to the PLC was established but has since been lost during operation.
Inspect cable integrity and connector seating. Check for address conflicts on the bus. Verify bus termination at both ends of the PROFIBUS segment.
Event ID: 40000: Project download error. The project transfer from the engineering PC to the HMI panel failed.
Check the transfer cable connection. Ensure the panel is set to Transfer mode. Verify WinCC flexible project compatibility with the panel firmware version.
Event ID: 20000: Tag read error. The HMI panel cannot read a configured tag from the PLC.
Verify the PLC data block or memory address referenced by the tag exists and is accessible. Check PLC program for address changes that may conflict with the HMI configuration.
Event ID: 20001: Tag write error. The HMI panel cannot write a value to the configured PLC tag.
Confirm the PLC memory area is not write-protected. Check that the data type configured in the HMI project matches the PLC variable type.
Event ID: 70010: Internal device error or hardware fault detected on the HMI panel.
Perform a power cycle. If the fault persists, back up the project and perform a factory reset. If the error recurs after reset, the panel may require repair or replacement.
Event ID: 50000: Printer communication error. The panel cannot communicate with the configured printer.
Check printer cable connections and printer power status. Verify printer driver settings in the WinCC flexible project match the connected printer model.

Frequently Asked Questions

Which PLCs are compatible with the OP 177B (6AV6355-1CA47-7BB8)?

The OP 177B is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It also supports connections to S7-1200 and S7-1500 PLCs in some configurations using appropriate communication settings.

What engineering software is required to configure this panel?

The OP 177B is configured using Siemens WinCC flexible 2005 or a later version. Projects are downloaded to the panel via a PC adapter cable connected to the MPI interface.

What is the supply voltage for the 6AV6355-1CA47-7BB8?

The panel requires a 24 V DC supply voltage. The supply should be connected to the designated power connector on the rear of the unit.

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. The rear of the unit is rated IP20.

Can the OP 177B be used as a direct replacement for older Siemens OP panels?

The OP 177B can replace older SIMATIC HMI panels such as the OP 170B and similar units in the same series, provided the project is adapted in WinCC flexible for the target panel type. Physical cutout dimensions should be verified before installation.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check for blown internal fuses or wiring faults in the supply circuit.

Ensure the 24 V DC supply is within tolerance and correctly wired. If supply voltage is confirmed correct and the display remains blank, the internal power supply board or backlight may require replacement.

Panel shows 'Connecting…' and fails to establish PLC communication

Verify the MPI or PROFIBUS DP address configured in the HMI project matches the address set on the PLC. Check bus cable continuity and termination resistors at both ends of the bus segment.

Correct any address mismatches in the WinCC flexible project and re-download. Replace damaged bus cables and ensure proper 120-ohm termination is applied at both ends of the PROFIBUS or MPI segment.

Touchscreen or keypad inputs are not responding correctly

Check for physical damage to the membrane keypad. Verify that no foreign material is obstructing the keys. For touch-enabled variants, check touch calibration settings in the panel's system menu.

Clean the keypad surface and remove any obstructions. Recalibrate the touch interface via the panel's Start Center or system settings menu. If keys remain unresponsive, the keypad membrane assembly may need replacement.

Project transfer from PC to panel fails repeatedly

Confirm the panel is in Transfer mode via the Start Center. Check the PC adapter cable connection to the MPI port. Verify the WinCC flexible project version is compatible with the panel's firmware.

Set the panel to Transfer mode manually. Use a known-good PC adapter cable. Update the panel firmware if a version mismatch is identified, then retry the project download.

Panel displays corrupted graphics or incorrect text after project download

This may indicate a project compilation error or a firmware incompatibility between the engineering software version and the panel firmware.

Recompile the project in WinCC flexible, checking for any reported errors. Ensure the target panel type selected in the project matches the physical hardware. Update panel firmware to the version recommended for the WinCC flexible release in use.

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