Siemens 6AV6520-0CA05-2AD0 SIMATIC OP 55

Name: Siemens 6AV6520-0CA05-2AD0 SIMATIC OP 55
Brand: Siemens
SKU: 6AV6520-0CA05-2AD0
Price: 547.00 EUR
Availability: InStock

€ 547,00

Condition

Clear

SKU: 6AV6520-0CA05-2AD0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6520-0CA05-2AD0 is an operator panel (OP 55) belonging to the SIMATIC HMI family, designed for human-machine interface applications in industrial automation environments. This unit provides a compact, text-based display interface for monitoring and controlling machine processes, and is part of Siemens' established line of operator panels intended for integration with SIMATIC PLCs. The OP 55 offers a straightforward operator interface suitable for applications requiring alphanumeric display and function key input.

The OP 55 features a multi-line LCD text display capable of showing alphanumeric characters and process values, along with a set of configurable function keys for operator input. It communicates with host controllers via serial interfaces, supporting protocols compatible with SIMATIC S5 and S7 PLC families. The panel is configured using Siemens ProTool software, allowing engineers to define screens, messages, and variable links. The unit operates on a 24 V DC supply and is built for panel mounting with a defined front-face protection rating suitable for industrial cabinet installation.

The SIMATIC OP 55 is commonly deployed in manufacturing, machine building, and process automation applications where a cost-effective, text-based operator interface is sufficient. It is well suited for controlling conveyor systems, packaging machinery, and general-purpose industrial machines where operators need to monitor process variables and trigger control actions. Its compatibility with the SIMATIC S5 and S7 controller families makes it a practical choice for both legacy system maintenance and straightforward new installations.

Technical Specifications

Display Type	LCD text display
Display Lines	4 lines
Characters per Line	20 characters
Input/Operating Voltage	24 V DC
Communication Interface	Serial (RS-232 / RS-422/485)
PLC Compatibility	SIMATIC S5, SIMATIC S7
Configuration Software	ProTool
Mounting	Panel mounting
IP Protection Rating (Front)	IP65
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +70 °C
Relative Humidity	10 % to 90 % (non-condensing)
Certifications	CE, UL

Common Error Codes & System Events

Event ID: 10000: No connection to PLC – communication between the OP 55 and the configured PLC cannot be established.
Check serial cable wiring and connections. Verify PLC address settings and communication parameters (baud rate, parity) match the OP 55 configuration.
Event ID: 10001: Communication timeout – the PLC did not respond within the expected time window.
Check cable integrity and connector pins. Verify PLC is in RUN mode and that the configured polling cycle time is appropriate.
Event ID: 20000: Configuration error – the project data loaded onto the OP 55 is invalid or incompatible with the firmware version.
Reload the project using ProTool, ensuring the firmware version of the OP 55 matches the target device selected during configuration.
Event ID: 20001: Transfer mode active – the panel is waiting for a project download from the configuration PC.
Initiate project transfer from ProTool, or restart the panel to exit transfer mode if a transfer is not intended.
Event ID: 40000: Operating system error – an internal firmware fault has been detected.
Perform a power cycle. If the fault persists, reload the firmware using the appropriate Siemens update tool or contact Siemens service.
Event ID: 40001: Memory error – a fault has been detected in the internal memory during self-test.
Power cycle the device. If the error recurs, the internal memory may be corrupted; reload the project or replace the unit.
Event ID: 50000: Printer error – a fault has been detected on the connected printer interface.
Check printer connection and ensure the printer is powered on and online. Verify printer configuration settings in the ProTool project.

Frequently Asked Questions

What PLC families are compatible with the SIMATIC OP 55?

The OP 55 is compatible with Siemens SIMATIC S5 and S7 PLC families via serial communication interfaces. The specific protocol and connection type depend on the PLC model and the configured driver in ProTool.

What software is used to configure the OP 55?

The OP 55 is configured using Siemens ProTool software. Projects are created on a PC and then transferred to the panel via a serial download cable.

What is the supply voltage for the 6AV6520-0CA05-2AD0?

The OP 55 operates on a 24 V DC supply voltage, which is the standard supply used across the SIMATIC HMI operator panel range.

What is the front panel protection rating of the OP 55?

The OP 55 front face carries an IP65 protection rating, making it suitable for panel-mount installations where dust and water spray protection is required.

Can the OP 55 display graphics or only text?

The OP 55 is a text-based operator panel and displays alphanumeric characters only. It does not support graphical or bitmap-based screen content.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify polarity and measure actual voltage under load. Inspect internal fuse if accessible.

Correct any wiring errors or supply voltage issues. Replace the internal fuse if blown. If the supply is confirmed good and the display remains blank, the internal power supply or display unit may require replacement.

No communication with SIMATIC PLC

Verify the serial cable type and pin assignment match the configured interface (RS-232 or RS-422/485). Check baud rate, parity, and station address settings on both the OP 55 and the PLC.

Replace or re-wire the communication cable as required. Align communication parameters in the ProTool project with the PLC configuration and reload the project to the panel.

Panel continuously shows 'Transfer' mode on startup

The panel is configured to start in transfer mode, or the project stored in memory is missing or corrupted.

Connect the configuration PC and transfer a valid ProTool project to the panel. If no transfer is intended, check the startup settings in the ProTool project and reload with the correct startup mode selected.

Function keys do not respond to operator input

Check whether the panel is in a locked or protected operating state. Verify that the function keys are correctly assigned in the ProTool project and that the project has been successfully transferred.

Reload the ProTool project ensuring all function key assignments are correctly defined. If hardware key failure is suspected, test individual keys and consider panel repair or replacement.

Incorrect or garbled characters displayed on screen

This may indicate a communication error causing corrupted variable data, or a mismatch between the character set configured in ProTool and the panel firmware.

Verify communication integrity by checking cable shielding and grounding. Confirm the character set and language settings in the ProTool project match the panel firmware version, then reload the project.

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