Siemens 6AV6321-1GC04-0CY6 SIMATIC HMI OP3

Name: Siemens 6AV6321-1GC04-0CY6 SIMATIC HMI OP3
Brand: Siemens
SKU: 6AV6321-1GC04-0CY6
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1GC04-0CY6 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1GC04-0CY6 is a compact operator panel belonging to the SIMATIC HMI OP3 series, manufactured by Siemens. It is a text-based operator panel designed for simple machine-level human-machine interface tasks, providing operators with a straightforward means of monitoring and controlling industrial processes. The OP3 is part of the classic SIMATIC HMI panel family and is intended for use in space-constrained control cabinet installations.

The OP3 features a 2-line LCD text display capable of showing alphanumeric characters, with a membrane keypad for operator input. It communicates via the MPI (Multi-Point Interface) and PROFIBUS DP protocols, enabling direct integration with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel is configured using ProTool software and supports a limited number of configurable function keys, alarms, and data input fields suited to basic HMI requirements.

The SIMATIC OP3 is commonly deployed in manufacturing, packaging, and process automation environments where a full graphical display is not required. It is well suited for small machines, auxiliary stations, and retrofit applications where panel space is limited and the operator interface requirements are minimal. Its robust membrane keypad and compact form factor make it appropriate for industrial environments with moderate levels of dust and humidity.

Technical Specifications

Display Type	LCD text display
Display Lines	2 lines
Characters per Line	16 characters
Input Device	Membrane keypad
Communication Interface	MPI, PROFIBUS DP
Operating Voltage	24 V DC
Power Consumption	2.5 W
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
Configuration Software	ProTool
Series/Product Family	SIMATIC HMI OP3

Common Error Codes & System Events

Event ID: 10000: Communication error between OP3 and connected PLC. The panel cannot establish or maintain a connection to the configured controller.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the MPI address configured on the OP3 matches the PLC settings. Ensure the PLC is in RUN mode.
Event ID: 10001: MPI bus address conflict detected. Two or more devices on the MPI network share the same bus address.
Check all MPI node addresses on the network and assign a unique address to the OP3 via the panel settings menu. Restart the panel after correction.
Event ID: 20000: Configuration download error. The project data transfer from the configuration PC to the OP3 was interrupted or failed.
Verify the PC-to-OP3 cable connection and COM port settings. Ensure ProTool is configured with the correct transfer parameters and retry the download.
Event ID: 30000: Tag read error. The OP3 is unable to read a configured PLC data tag or variable.
Verify the PLC data block and variable address referenced in the ProTool project exist and are accessible. Check that the PLC program is running and the data area is not write-protected.
Event ID: 40000: Alarm buffer overflow. The number of pending alarms exceeds the capacity of the OP3 alarm buffer.
Acknowledge and clear existing alarms on the panel. Review the PLC program to identify and resolve the root cause of the excessive alarm conditions.
System Error: Internal device fault detected. The OP3 has encountered an unrecoverable internal hardware or firmware error.
Perform a power cycle on the panel. If the error persists, reload the project configuration via ProTool. If the fault remains, the unit may require repair or replacement.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP3?

The OP3 is compatible with Siemens SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication. It is not natively compatible with S7-1200 or S7-1500 series PLCs.

What software is used to configure the OP3 panel?

The OP3 is configured using Siemens ProTool software. WinCC Flexible and TIA Portal do not support the OP3 series.

What is the supply voltage for the 6AV6321-1GC04-0CY6?

The panel operates on 24 V DC supply voltage.

What is the IP protection rating of the OP3 front panel?

The front panel of the OP3 achieves IP65 protection, making it resistant to dust ingress and low-pressure water jets when correctly installed in a panel cutout.

Can the OP3 display graphical content or images?

No, the OP3 is a text-only operator panel with a 2-line alphanumeric LCD display. It does not support graphical content, bitmaps, or trend displays.

Troubleshooting

Display remains blank after power on

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

Restore the correct 24 V DC supply. If the supply voltage is correct and the display remains blank, the internal power supply or LCD backlight may have failed, requiring unit repair or replacement.

Panel cannot communicate with the PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated at both ends. Check that the MPI bus address on the OP3 matches the address configured in the ProTool project and that no address conflicts exist on the bus.

Correct any address conflicts, replace damaged cables, and ensure proper bus termination. Reload the project to the OP3 if configuration parameters were changed.

Configuration download fails from PC to OP3

Check the RS-232 or PC adapter cable connection between the PC and the OP3 transfer port. Verify the COM port and transfer speed settings in ProTool match the panel settings.

Use the correct PC/PPI or MPI adapter cable, set the correct COM port in ProTool, and ensure the OP3 is in transfer mode before initiating the download.

Operator keypad buttons are unresponsive

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically using a diagnostic screen if available in the project configuration.

Clean the keypad surface with a dry cloth. If individual keys remain unresponsive due to membrane damage, the keypad membrane or the complete panel unit will require replacement.

Alarm messages are not displayed on the panel

Verify that the alarm tags in the ProTool project are correctly linked to the corresponding PLC bit addresses. Confirm the PLC program is setting the alarm bits as expected by monitoring the PLC online.

Correct any misconfigured alarm tag addresses in the ProTool project and reload the configuration to the panel. Ensure the PLC program logic correctly triggers the alarm bits.

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