Siemens 6AV6321-1GC24-0CY0 SIMATIC OP 27

Name: Siemens 6AV6321-1GC24-0CY0 SIMATIC OP 27
Brand: Siemens
SKU: 6AV6321-1GC24-0CY0
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6321-1GC24-0CY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1GC24-0CY0 is an Operator Panel (OP 27) belonging to the SIMATIC HMI family, designed for human-machine interface applications in industrial automation environments. This unit provides a monochrome graphical display with integrated function keys and membrane keypad for operator interaction. It is part of the SIMATIC OP series, which is engineered for robust panel-mount installations in control cabinets and machine fronts.

The OP 27 features a 5.7-inch STN LCD display with a resolution of 240 x 128 pixels and supports both text and graphics-based visualization. It communicates via MPI (Multi-Point Interface) and PROFIBUS-DP, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs without additional hardware. The unit is configured using ProTool software and offers configurable function keys, alarm management, recipe handling, and trend display capabilities. It operates on a 24 V DC supply and is rated IP65 on the front panel for protection against dust and water ingress.

The SIMATIC OP 27 is widely deployed in machine building, process automation, and manufacturing industries where a compact, keypad-operated HMI is required. It is commonly found on packaging machinery, conveyor systems, press lines, and general-purpose industrial machines. Its compatibility with the SIMATIC S7 controller family and support for PROFIBUS-DP makes it a practical choice for integration into existing Siemens automation architectures.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD (monochrome)
Display Resolution	240 x 128 pixels
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 10 W
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 mount
Configuration Software	ProTool
Certifications	CE, UL, CSA

Common Error Codes & System Events

Event ID: 1000: System startup completed successfully. The HMI panel has booted and the runtime environment is active.
No action required. This is an informational event confirming normal startup.
Event ID: 10000: Connection to PLC lost. Communication between the OP 27 and the configured controller has been interrupted.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify PLC is powered and communicating. Check configured station address and baud rate in ProTool project.
Event ID: 10001: Connection to PLC established. Communication has been successfully restored or initialized.
No action required. This is an informational event confirming communication is active.
Event ID: 20000: Tag read error. The HMI was unable to read a configured tag from the PLC.
Verify the tag address exists in the PLC program and that the data block or memory area is accessible. Check for address conflicts in the ProTool configuration.
Event ID: 20001: Tag write error. The HMI was unable to write a value to a configured PLC tag.
Confirm the PLC memory area is not write-protected. Verify the tag address and data type match the PLC configuration. Check communication status.
Event ID: 40000: Recipe data error. A recipe transfer operation failed or recipe data is inconsistent.
Check recipe configuration in ProTool. Verify sufficient memory is available and that recipe tag addresses are correctly mapped to the PLC.
Event ID: 50000: Internal device error. A hardware or firmware fault has been detected within the OP 27.
Perform a power cycle. If the error persists, back up the project and perform a factory reset. If unresolved, the unit may require repair or replacement.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP 27?

The OP 27 is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS-DP interfaces. It can also communicate with SIMATIC S5 controllers using appropriate protocol settings.

What software is used to configure the OP 27?

The OP 27 is configured using Siemens ProTool software. Projects are transferred to the panel via MPI cable or a PC adapter connected to the MPI/PROFIBUS interface.

What is the display type and resolution of the 6AV6321-1GC24-0CY0?

The display is a 5.7-inch monochrome STN LCD with a resolution of 240 x 128 pixels, capable of displaying both text and graphical content.

What is the front panel protection rating of the OP 27?

The front panel of the OP 27 is rated IP65, providing protection against dust ingress and low-pressure water jets, making it suitable for industrial panel-mount installations.

What communication interfaces does the OP 27 support?

The OP 27 supports MPI (Multi-Point Interface) and PROFIBUS-DP communication protocols, allowing direct integration with SIMATIC S7 controllers and PROFIBUS networks.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector. Check that the supply is within the specified tolerance. Inspect the internal fuse if accessible.

Ensure the 24 V DC supply is stable and correctly connected. If the supply is confirmed good and the display remains blank, the internal power supply or display backlight may have failed, requiring unit repair or replacement.

HMI shows 'No connection to PLC' or communication alarm on startup

Check MPI or PROFIBUS-DP cable integrity and connector seating. Verify the PLC station address configured in ProTool matches the actual PLC address. Check bus termination at both ends of the cable.

Replace or reseat the communication cable. Correct the station address in the ProTool project and retransfer the configuration. Ensure PROFIBUS termination resistors are enabled only at the physical ends of the bus.

Function keys do not respond or produce incorrect actions

Test each function key in the panel's service/test mode if available. Check the ProTool project for correct key assignments. Inspect the membrane keypad for physical damage or contamination.

Reconfigure key assignments in ProTool and retransfer the project. If keys are physically damaged or unresponsive after reconfiguration, the membrane keypad assembly requires replacement.

Project transfer from PC to OP 27 fails

Verify the MPI cable or PC adapter is correctly connected and the COM port or USB adapter is recognized by the PC. Confirm the transfer baud rate in ProTool matches the panel settings. Check that the panel is in transfer mode.

Set the OP 27 to transfer mode via the panel's startup menu. Ensure the correct interface and baud rate are selected in ProTool's transfer settings. Try a different MPI cable or PC adapter if the issue persists.

Display shows distorted or incomplete graphics

Check if the issue is consistent across all screens or only specific configured screens. Verify the ProTool project graphics are within the display resolution limits of 240 x 128 pixels.

Retransfer the ProTool project to the panel. If distortion persists on all screens, the LCD or display controller may be faulty, and the unit should be sent for repair.

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