Siemens 6AV6355-1AA47-7CB1 OP 77B

€ 3.495,00

SKU: 6AV6355-1AA47-7CB1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1AA47-7CB1 is an OP 77B operator panel belonging to the SIMATIC HMI Basic Panels product family. This compact operator panel is designed for machine-level human-machine interface applications and provides a straightforward interface for monitoring and controlling automated processes. It is part of Siemens' established line of operator panels intended for integration with SIMATIC S7 PLCs and other compatible controllers.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels, providing clear text and simple graphic representation of process data. The panel supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs without additional hardware. It is configured using the WinCC flexible compact engineering software and supports function keys for operator input. The unit operates on a 24 V DC supply and is rated to IP65 on the front face, making it suitable for panel-mounting in industrial environments.

The OP 77B is commonly used in manufacturing, packaging, and process automation applications where a cost-effective, reliable operator interface is required at the machine level. Its compact form factor and robust construction make it well-suited for integration into control cabinets and machine panels in industries such as automotive, food and beverage, and general factory automation. The panel's compatibility with the SIMATIC controller range makes it a practical choice for system integrators working within established Siemens automation architectures.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Input Voltage	24 V DC
Power Consumption	4.5 W (typical)
Communication Interface	MPI, PROFIBUS DP
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel mounting
Engineering Software	WinCC flexible compact
Certifications	CE, UL, cULus

Common Error Codes & System Events

Event ID: 1000: Controller not available or communication connection to the PLC has been lost
Check MPI/PROFIBUS DP cable connections and termination resistors. Verify PLC is powered and running. Confirm correct station address settings on both devices.
Event ID: 1003: Connection to the configured controller cannot be established during startup
Verify the communication interface settings in WinCC flexible match the PLC configuration. Check baud rate, station address, and cable integrity.
Event ID: 10000: Tag read error — the panel cannot read the value of a configured tag from the PLC
Check that the tag address configured in WinCC flexible exists in the PLC program. Verify the data block or memory area is accessible.
Event ID: 10001: Tag write error — the panel cannot write a value to the configured PLC tag
Ensure the target PLC memory area is not write-protected. Verify the tag address and data type match the PLC configuration.
Event ID: 20000: System memory low — available panel memory is insufficient for current project
Reduce the project size by removing unused screens, tags, or alarm entries. Transfer a simplified project to the panel using WinCC flexible.
Event ID: 40000: Configuration error detected — the project loaded on the panel contains invalid or incompatible settings
Re-transfer the project from WinCC flexible after verifying all screen objects, tag connections, and communication settings are correctly configured.
Event ID: 70010: Operating system error — internal panel firmware fault detected
Perform a panel reset. If the fault persists, update the panel firmware using the ProSave tool or return the unit for service.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B?

The OP 77B is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S7-200 via the PPI protocol.

What software is used to configure the OP 77B?

The OP 77B is configured using Siemens WinCC flexible compact engineering software. Projects are transferred to the panel via the MPI interface or a USB-to-MPI adapter.

What is the supply voltage for the 6AV6355-1AA47-7CB1?

The panel requires a 24 V DC supply voltage. Ensure the power source is within the specified tolerance range to avoid damage or malfunction.

What is the IP protection rating of the OP 77B?

The front face of the OP 77B is rated IP65, providing protection against dust and water jets. The rear of the unit is rated IP20.

Can the OP 77B display graphics and images?

The OP 77B supports basic graphics and bitmap images on its monochrome display, but its 160 x 80 pixel resolution limits graphical complexity. It is primarily suited for text-based process data display.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check for blown internal fuse or incorrect polarity on the supply connection.

Correct the supply voltage or polarity. Replace the internal fuse if blown. If the display backlight has failed, the panel may require backlight replacement or unit exchange.

Panel fails to communicate with the PLC

Verify MPI or PROFIBUS DP cable connections at both the panel and PLC. Check station addresses and baud rate settings in WinCC flexible against the PLC hardware configuration.

Correct any address or baud rate mismatches. Ensure bus termination resistors are correctly placed at both ends of the network. Replace the communication cable if damaged.

Project transfer from WinCC flexible fails

Check the USB-to-MPI adapter driver installation on the engineering PC. Verify the correct COM port or adapter is selected in WinCC flexible transfer settings.

Reinstall the adapter driver, select the correct interface in the transfer dialog, and retry. Ensure the panel is in transfer mode before initiating the download.

Operator inputs via function keys are not responding

Check the project configuration in WinCC flexible to confirm function key assignments are correctly mapped to screen objects or PLC tags.

Re-configure and re-transfer the project with correct function key assignments. If keys are physically damaged, the panel membrane keypad may require replacement.

Panel displays persistent communication error after PLC program change

A change in PLC data block structure or tag addresses may have invalidated the existing HMI tag configuration.

Update the tag addresses in the WinCC flexible project to match the revised PLC program, then re-transfer the project to the panel.

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