Siemens 6AV6321-1GC24-0MY6 SIMATIC OP 27

Name: Siemens 6AV6321-1GC24-0MY6 SIMATIC OP 27
Brand: Siemens
SKU: 6AV6321-1GC24-0MY6
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1GC24-0MY6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1GC24-0MY6 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 or color graphical display interface for process visualization, machine control, and status monitoring. It is part of Siemens' established OP series, which is engineered for robust deployment in demanding industrial settings.

The OP 27 panel features a 5.7-inch STN display with a resolution of 320 x 240 pixels and supports both text and graphics-based visualization. It is equipped with MPI and PROFIBUS-DP communication interfaces, enabling direct integration with SIMATIC S7-300 and S7-400 PLCs without the need for additional gateways. The unit includes a membrane keypad with function keys for operator input, onboard Flash memory for project storage, and operates on a 24 V DC supply. Configuration is performed using Siemens ProTool or WinCC flexible engineering software.

The SIMATIC OP 27 is widely used in machine building, process automation, and manufacturing industries where reliable operator interaction with PLC-controlled systems 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 its compact panel-mount form factor make it a practical choice for retrofit and new installation projects alike.

Technical Specifications

Display Size	5.7 inch
Display Type	STN LCD
Display Resolution	320 x 240 pixels (QVGA)
Display Colors	Monochrome (blue-mode)
Input/Operating Voltage	24 V DC
Power Consumption	Approx. 10 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/Protection Rating	IP65 (front panel)
Mounting	Panel mounting
Series/Product Family	SIMATIC OP 27
Engineering Software	ProTool, WinCC flexible

Common Error Codes & System Events

Event ID: 10000: No connection to PLC. The HMI panel cannot establish communication with the configured controller.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify PLC address settings match the HMI project configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Communication error with PLC. Data exchange has been interrupted during operation.
Inspect the communication cable for damage. Verify bus termination and cable shielding. Check for address conflicts on the MPI or PROFIBUS network.
Event ID: 20000: Project download failed. The transfer of the HMI project from the engineering PC to the panel was unsuccessful.
Ensure the panel is in Transfer mode before initiating download. Verify the PC-to-panel cable (PC/MPI adapter or USB-MPI) is correctly connected and the correct COM port is selected in ProTool or WinCC flexible.
Event ID: 40000: System memory low. Available memory on the panel is insufficient for the current project or runtime operation.
Reduce the project size by removing unused screens, tags, or graphics. Perform a full project download after optimization to clear fragmented memory.
Event ID: 50000: Illegal system state. The panel has detected an internal runtime error or inconsistent system state.
Perform a controlled restart of the panel. If the error persists, reload the project via ProTool or WinCC flexible and check for project configuration errors.
Event ID: 60000: Backup battery low or missing. The internal buffer battery voltage is below the minimum threshold.
Replace the internal lithium backup battery with the correct Siemens replacement type. Ensure power is maintained during battery replacement to avoid data loss.
Event ID: 70000: Operating system error. A fault has been detected in the panel firmware or operating system.
Perform a firmware update using the Siemens ProSave tool and the correct firmware version for the OP 27. If the panel fails to boot, a complete OS reload via bootstrap mode may be required.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP 27?

The OP 27 is compatible with SIMATIC S7-300 and S7-400 PLCs via MPI or PROFIBUS-DP interfaces. It can also communicate with S5 controllers using appropriate protocol adapters configured in the engineering software.

What engineering software is required to configure the OP 27?

The OP 27 is configured using Siemens ProTool (legacy) or WinCC flexible (Compact or Standard edition). WinCC flexible is the recommended tool for current projects and supports migration from ProTool projects.

What is the operating voltage for the 6AV6321-1GC24-0MY6?

The panel operates on 24 V DC, which must be supplied within the specified tolerance range, typically 20.4 V DC to 28.8 V DC.

Does the OP 27 support touch input?

No, the OP 27 does not have a touchscreen. Operator input is performed via the integrated membrane keypad, which includes system keys and configurable function keys.

Can the OP 27 panel be used as a replacement in existing SIMATIC HMI installations?

Yes, the OP 27 is a direct fit for existing OP 27 installations and is compatible with projects developed for this panel family. Panel cutout dimensions and communication interfaces are standardized within the OP 27 series.

Troubleshooting

Display remains blank after power is applied

Measure the 24 V DC supply voltage at the panel power connector. Check for blown internal fuse. Verify the supply polarity is correct.

Correct any supply voltage issues or replace the internal fuse if blown. If the supply is confirmed good and the display remains blank, the internal power supply board or backlight inverter may require replacement.

Panel fails to communicate with the S7 PLC

Check MPI or PROFIBUS-DP cable continuity and connector integrity. Verify that bus termination resistors are correctly placed at both ends of the network. Confirm that the PLC station address in the HMI project matches the physical PLC configuration.

Replace damaged cables or connectors. Correct address mismatches in the HMI project and reload the project to the panel. Ensure only the two physical endpoints of the bus have termination resistors enabled.

Project download from PC to panel fails or times out

Confirm the panel is set to Transfer mode (accessible via the panel's Start Center or by pressing the appropriate key combination at startup). Verify the PC adapter (USB-MPI or PC/MPI) driver is correctly installed and the correct interface is selected in the engineering software.

Restart the panel in Transfer mode and retry the download. Update or reinstall the PC adapter drivers if necessary. Try a different USB port or adapter if the issue persists.

Panel displays 'Battery Low' warning or loses data after power off

The internal lithium backup battery is discharged or has reached end of life. This battery maintains retentive memory and the real-time clock when panel power is removed.

Replace the internal backup battery with the correct Siemens-specified lithium cell. Perform the replacement with panel power applied where possible to avoid loss of retentive data, following the procedure in the OP 27 operating instructions.

Operator keys or function keys do not respond

Inspect the membrane keypad for physical damage, contamination, or deformation. Check whether the issue is limited to specific keys or affects all keys, which helps distinguish between a keypad hardware fault and a project configuration issue.

Clean the keypad surface and check for mechanical damage. If individual keys are unresponsive due to membrane wear, the keypad membrane assembly should be replaced. If all keys are unresponsive, verify the project configuration for key assignments and reload the project.

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