Siemens 6AV6321-1FC24-0CY0 SIMATIC OP 27

Name: Siemens 6AV6321-1FC24-0CY0 SIMATIC OP 27
Brand: Siemens
SKU: 6AV6321-1FC24-0CY0
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6321-1FC24-0CY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1FC24-0CY0 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 touch and keypad input capabilities, enabling operators to monitor and control machine processes efficiently. It is part of Siemens' established SIMATIC HMI panel range, which is widely deployed across manufacturing and process industries.

The OP 27 features a 5.7-inch STN monochrome LCD display with a resolution of 320 x 240 pixels, offering clear visualization of process data, alarms, and operator prompts. It communicates via MPI (Multi-Point Interface) and PROFIBUS DP interfaces, allowing direct integration with SIMATIC S7-300 and S7-400 PLCs. The panel includes function keys, cursor keys, and a numeric keypad for operator input, and supports configuration via Siemens ProTool or WinCC flexible engineering software. Onboard memory supports project data storage, and the unit is built to withstand typical industrial environmental conditions.

The SIMATIC OP 27 is commonly used in machine tool control, packaging machinery, conveyor systems, and general factory automation where a compact, reliable operator interface is required. Its compatibility with the SIMATIC S7 PLC family makes it a natural fit for Siemens-based automation architectures. The panel is suitable for panel mounting in control cabinets and operator stations across discrete manufacturing and process industries.

Technical Specifications

Display Size	5.7 inch
Display Type	STN monochrome LCD
Display Resolution	320 x 240 pixels
Input Voltage	24 V DC
Power Consumption	Max. 15 W
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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Series/Product Family	SIMATIC HMI OP 27
Engineering Software	ProTool, WinCC flexible

Common Error Codes & System Events

Event ID: 10000: Communication error between the OP 27 and the connected PLC. The panel cannot establish or maintain a connection to the configured controller.
Check MPI or PROFIBUS DP cable connections and termination resistors. Verify the configured station address matches the PLC settings. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Timeout error on the MPI or PROFIBUS DP bus. The panel did not receive a response from the PLC within the expected time frame.
Check bus cable integrity and connector pins. Verify bus termination at both ends of the network. Reduce bus load or check for address conflicts.
Event ID: 20000: Project download error. The configuration project could not be transferred to the panel successfully.
Check the serial or MPI connection between the engineering PC and the OP 27. Verify the ProTool or WinCC flexible project is compiled without errors before downloading.
Event ID: 40000: System memory error. The panel has detected a fault in its internal memory during startup or operation.
Perform a panel reset and reload the project. If the fault persists, the internal memory may be corrupted and the unit may require repair or replacement.
Event ID: 50000: Configuration error. The loaded project contains settings that are incompatible with the panel hardware or firmware version.
Verify the project was compiled for the correct panel type (OP 27) and firmware version. Recompile and re-download the project using the appropriate engineering software version.
Event ID: 60000: Power supply undervoltage detected. The 24 V DC supply voltage has dropped below the minimum operating threshold.
Measure the 24 V DC supply at the panel power connector. Ensure the power supply unit is rated for the panel's current draw and that cable voltage drop is within acceptable limits.
Event ID: 70000: Alarm buffer overflow. The number of pending alarms has exceeded the panel's alarm buffer capacity.
Acknowledge and clear existing alarms on the panel. Review the alarm configuration in the project to ensure alarm limits and triggers are correctly set to avoid excessive alarm generation.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP 27?

The OP 27 is primarily designed for use with Siemens SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS DP interfaces. It can also communicate with S5 PLCs using appropriate protocol drivers configured in the engineering software.

What engineering software is required to configure the OP 27?

The OP 27 is configured using Siemens ProTool or WinCC flexible engineering software. Projects created in ProTool can generally be migrated to WinCC flexible for use with newer toolchains.

What is the supply voltage for the 6AV6321-1FC24-0CY0?

The panel operates on a 24 V DC supply voltage. Ensure the power source is stable and within the specified tolerance range to avoid undervoltage faults.

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

The front panel of the OP 27 achieves an IP65 protection rating when correctly installed with the supplied gasket, making it suitable for use in environments with dust and water spray.

Can the OP 27 display color graphics?

No, the OP 27 features a monochrome STN LCD display. It does not support color graphics, but it can display text, bar graphs, trend curves, and bitmap images in monochrome.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the panel power connector using a multimeter. Verify that the supply is within the specified range and that the connector is fully seated.

If supply voltage is correct, check the internal fuse of the panel. If the fuse is intact and the display remains blank, the internal power supply board or backlight may be faulty and require replacement.

Panel shows 'No connection to PLC' or communication error on startup

Verify the MPI or PROFIBUS DP cable is correctly connected and that bus termination resistors are active at both ends of the network. Check that the PLC station address configured in the project matches the actual PLC address.

Replace or reseat the communication cable. Correct any address conflicts on the bus. Ensure the PLC is powered and in RUN mode. Re-download the project if configuration changes were made.

Touchscreen or function keys do not respond to input

Check whether the panel is in a locked or protected operating mode. Attempt a panel restart. If keys are physically damaged, inspect the keypad membrane for wear or contamination.

Perform a soft reset of the panel. If the issue persists, the keypad membrane or touch controller hardware may require replacement. Clean the front panel surface and ensure no foreign objects are obstructing the keys.

Project download fails or is interrupted

Check the connection between the engineering PC and the OP 27 via MPI adapter or serial cable. Verify that the correct COM port and transfer speed are selected in the engineering software.

Restart both the engineering PC and the panel in transfer mode. Ensure no other software is occupying the COM port. Re-attempt the download with a verified, compiled project file.

Panel displays garbled text or incorrect characters

This may indicate a corrupted project file on the panel or a mismatch between the configured font and the panel firmware version.

Re-download the project from the engineering PC after recompiling it. If the issue persists after re-download, perform a factory reset of the panel and reload the project from scratch.

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