Siemens 6AV6355-1CA47-7BC3 OP 77B

€ 3.495,00

SKU: 6AV6355-1CA47-7BC3 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6355-1CA47-7BC3 is an operator panel belonging to the OP 77B series within the Siemens SIMATIC HMI product family. This unit is a compact, key-operated operator panel designed for machine-level human-machine interface tasks, providing a straightforward interface for monitoring and controlling industrial processes. It is part of the SIMATIC HMI Basic Panels generation and is intended for use with Siemens SIMATIC S7 PLCs and compatible controllers.

The OP 77B features a monochrome STN LCD display with a resolution of 160 x 80 pixels and a backlit screen for clear readability in various lighting conditions. It supports MPI and PROFIBUS DP communication interfaces, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs without an additional communication module. The panel includes a membrane keypad with function keys, system keys, and numeric entry keys, and is configured using Siemens WinCC flexible software. It operates on a 24 V DC supply and carries CE and UL certifications.

The OP 77B is commonly deployed in machine building, manufacturing automation, and process control applications where a cost-effective, robust operator interface is required at the machine level. It is well suited for tasks such as displaying process values, entering setpoints, acknowledging alarms, and navigating simple menu structures. Industries including automotive, food and beverage, packaging, and general manufacturing regularly use this panel for local operator control stations.

Technical Specifications

Display Type	Monochrome STN LCD
Display Resolution	160 x 80 pixels
Display Size	4 inch
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS DP
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
IP Protection Rating (Front)	IP65
Mounting	Panel mounting
Configuration Software	WinCC flexible 2008
Certifications	CE, UL
Series/Product Family	SIMATIC HMI OP 77B

Common Error Codes and System Events

Event ID: 10000: No connection to the PLC or controller. Communication between the OP 77B and the configured PLC has been interrupted.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify PLC address settings match the configuration in WinCC flexible. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Connection to PLC established after a previous communication failure.
No corrective action required. This is an informational event indicating communication has been restored.
Event ID: 20000: Operating system error or internal device fault detected.
Perform a power cycle on the panel. If the error persists, check the firmware version and consider updating or restoring the device configuration via WinCC flexible.
Event ID: 40000: Configuration download error. The project data transferred to the panel is incompatible or corrupted.
Re-transfer the project from WinCC flexible ensuring the correct panel type and firmware version are selected. Check the USB or MPI transfer cable and retry the download.
Event ID: 50000: Tag read/write error. A configured tag could not be read from or written to the PLC.
Verify the tag address in WinCC flexible matches the actual PLC data block or memory area. Check PLC program for address conflicts or data type mismatches.
Event ID: 60000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms. Review the alarm configuration in WinCC flexible and consider increasing the acknowledgment priority or reducing alarm frequency in the PLC program.

Frequently Asked Questions

Which PLCs are compatible with the OP 77B?

The OP 77B supports direct connection to Siemens 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 required to configure the 6AV6355-1CA47-7BC3?

The OP 77B is configured using Siemens WinCC flexible 2008 or later. The project is transferred to the panel via MPI cable or USB-to-MPI adapter.

What is the supply voltage for this operator panel?

The OP 77B requires a 24 V DC power supply. Ensure the supply is within the specified tolerance range to avoid panel faults.

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

The front face of the OP 77B is rated IP65, making it suitable for panel-mounted installations where protection against dust and water jets is required.

Can the OP 77B display graphics or images?

The OP 77B has a monochrome display with limited graphical capability. It supports basic bar graphs and bitmap graphics but is primarily designed for text-based process value display and alarm messaging.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals. Verify the supply polarity is correct and the supply current is sufficient.

Correct the supply voltage or replace the power supply unit. If voltage is confirmed correct, the internal power supply or backlight of the panel may be faulty and the unit should be repaired or replaced.

Panel shows 'No connection to PLC' message continuously

Verify the MPI or PROFIBUS DP cable is securely connected at both the panel and PLC ends. Check bus termination resistors are correctly placed at both ends of the bus segment.

Replace or reseat the communication cable. Confirm the PLC station address and baud rate in WinCC flexible match the PLC configuration. Ensure no address conflicts exist on the bus.

Configuration download fails or panel does not accept new project

Check the WinCC flexible project is compiled without errors and the correct panel type (OP 77B) is selected. Verify the transfer cable is functional and the correct COM port or MPI adapter is selected in the transfer settings.

Recompile the project, select the correct panel type, and retry the transfer. Try a different MPI cable or USB adapter if the issue persists. Perform a factory reset on the panel if the memory is corrupted.

Function keys do not respond or produce incorrect actions

Check the key assignment in the WinCC flexible project. Inspect the membrane keypad for physical damage or contamination beneath the keys.

Re-download the correct project configuration to the panel. If keys are physically damaged, the membrane keypad assembly requires replacement.

Panel restarts repeatedly or enters a boot loop

This may indicate corrupted firmware or project data on the panel. Check if the panel displays any error message during the boot sequence.

Perform a firmware update or restore using WinCC flexible and the appropriate panel update tool. If the internal flash memory is faulty, the panel hardware requires professional repair or replacement.

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