Siemens 6AV6321-1CA24-0CY0 SIMATIC OP 27

Name: Siemens 6AV6321-1CA24-0CY0 SIMATIC OP 27
Brand: Siemens
SKU: 6AV6321-1CA24-0CY0
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6321-1CA24-0CY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1CA24-0CY0 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 for process visualization and operator control, and is part of the established SIMATIC OP series produced by Siemens. It serves as a compact, panel-mounted operator interface for monitoring and controlling automated processes.

The OP 27 features a 5.7-inch STN monochrome LCD display with a resolution of 240 x 128 pixels, offering clear readability in industrial settings. It supports communication via MPI (Multi-Point Interface) and PROFIBUS-DP, enabling direct integration with Siemens S7-300 and S7-400 PLCs as well as S5 controllers through appropriate drivers. The panel includes function keys and membrane keypad input, onboard Flash memory for project storage, and is configured using Siemens ProTool or WinCC flexible engineering software.

The SIMATIC OP 27 is widely deployed in manufacturing, process automation, and machine building industries where a reliable, text-and-graphics capable operator panel 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 robust industrial construction make it a practical choice for retrofit and new installation projects alike.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome LCD
Display Resolution	240 x 128 pixels
Input Type	Membrane keypad with function keys
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 10 W
Communication Interface	MPI, PROFIBUS-DP, RS-422/RS-485
Memory	512 KB Flash (project memory)
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 % (non-condensing)
IP Rating (Front)	IP65
Mounting	Panel mounting
Certifications	CE, UL, CSA
Series/Product Family	SIMATIC OP 27

Common Error Codes & System Events

Event ID: 10000: No connection to PLC – the operator panel cannot establish communication with the configured controller.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify PLC address settings match the OP 27 configuration in ProTool or WinCC flexible.
Event ID: 10001: Communication error – data transfer between the OP 27 and the PLC has been interrupted.
Inspect the communication cable for damage. Confirm bus termination is correct and that no address conflicts exist on the MPI or PROFIBUS network.
Event ID: 20000: Project download error – the project could not be transferred to the operator panel.
Verify the PC-to-OP 27 connection (MPI adapter or serial cable). Ensure the correct communication settings are configured in the engineering software and retry the download.
Event ID: 40000: Configuration error – the loaded project contains configuration data incompatible with the connected device.
Confirm the project was compiled for the OP 27 device type. Recompile the project in ProTool or WinCC flexible and re-download to the panel.
Event ID: 50000: Memory error – insufficient memory available on the panel to store the project.
Reduce the project size by removing unused screens or tags. Perform a complete panel reset and re-download the project.
Event ID: 60000: Operating system error – the panel firmware is corrupted or incompatible with the loaded project.
Perform a firmware update using the appropriate Siemens ProSave tool. If the issue persists, perform a factory reset and reload the operating system.
Event ID: 70000: Backlight failure warning – the LCD backlight has reached or exceeded its service life threshold.
Replace the backlight unit or the complete display module. Contact a qualified service technician for internal component replacement.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP 27 (6AV6321-1CA24-0CY0)?

The OP 27 is compatible with Siemens SIMATIC S7-300, S7-400, and S5 series PLCs via MPI or PROFIBUS-DP interfaces. Connectivity to third-party controllers may be possible using appropriate communication drivers.

What engineering software is used to configure the OP 27?

The OP 27 is configured using Siemens ProTool or WinCC flexible engineering software. Projects created in ProTool can typically be migrated to WinCC flexible for continued use.

What is the supply voltage for the 6AV6321-1CA24-0CY0?

The OP 27 operates on a 24 V DC supply voltage, which is standard for SIMATIC HMI panels in this series.

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

The front panel of the OP 27 carries an IP65 protection rating, making it suitable for installation in environments where dust and water jets may be present.

Can the OP 27 display graphical content or only text?

The OP 27 supports both text and graphics display on its 240 x 128 pixel monochrome LCD, allowing the creation of simple process diagrams, bar graphs, and trend displays in addition to text-based screens.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the panel power connector. Check whether the power LED indicator is illuminated. Inspect internal fuse if accessible.

Restore correct 24 V DC supply if voltage is absent or out of tolerance. If supply is correct but display remains blank, the backlight or internal power supply module may have failed and should be replaced.

OP 27 cannot communicate with the PLC

Verify the MPI or PROFIBUS-DP cable is correctly connected and terminated at both ends. Check that the bus address configured on the OP 27 matches the project settings and does not conflict with other devices on the network.

Correct any address conflicts, replace damaged cables, and ensure proper bus termination resistors are installed at both ends of the network segment. Re-download the project if communication parameters were changed.

Project download fails from engineering PC

Check the physical connection between the PC and the OP 27 using the MPI adapter or PC-OP cable. Confirm the correct COM port and transfer rate are selected in the engineering software.

Replace or reseat the communication cable. Set the correct interface parameters in ProTool or WinCC flexible and retry the download. If the panel is in run mode, switch it to transfer mode before initiating the download.

Panel displays 'Configuration Error' or loads incorrect project

Confirm that the project compiled in the engineering software targets the OP 27 device type specifically. Check that the firmware version on the panel is compatible with the project version.

Recompile the project ensuring the correct device is selected, update the panel firmware using ProSave if necessary, and re-download the corrected project.

Touchscreen or keypad inputs not responding

Inspect the membrane keypad for physical damage, contamination, or deformation. Verify that the panel is not in a locked or protected operating mode that disables input.

Clean the keypad surface and check for mechanical damage. If individual keys are unresponsive due to membrane failure, the keypad assembly should be replaced. Disable any operator input protection settings in the project configuration.

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