Siemens 6AV6321-1GC04-0MY0 SIMATIC HMI OP3

Name: Siemens 6AV6321-1GC04-0MY0 SIMATIC HMI OP3
Brand: Siemens
SKU: 6AV6321-1GC04-0MY0
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1GC04-0MY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1GC04-0MY0 is an Operator Panel (OP3) belonging to the SIMATIC HMI product family from Siemens. It is a compact, text-based operator panel designed for straightforward machine-level human-machine interface applications. The unit provides a simple, cost-effective interface for displaying process values and entering operator commands in automation environments.

The OP3 features a 2-line LCD text display capable of showing alphanumeric characters, along 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 PLCs. The panel is configured using SIMATIC ProTool software and supports a limited set of tags and screens suited to basic HMI tasks. The unit operates on a 24 V DC supply and is built for panel-mount installation in industrial enclosures.

The OP3 is typically deployed in manufacturing machinery, conveyor systems, and process automation equipment where a compact, low-cost operator interface is sufficient. It is well-suited for applications requiring basic status display, setpoint entry, and alarm acknowledgment without the need for graphical visualization. Industries such as food and beverage, packaging, and general factory automation commonly use this panel for decentralized machine control points.

Technical Specifications

Display Type	LCD text display
Display Lines	2 lines
Characters per Line	16 characters
Input/Operating Voltage	24 V DC
Communication Interface	MPI, PROFIBUS-DP
Configuration Software	SIMATIC ProTool
Mounting	Panel mount
Protection Rating (Front)	IP65
Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +70 °C
Relative Humidity	10% to 90% (non-condensing)
Series/Product Family	SIMATIC HMI OP3
Certifications	CE, UL

Common Error Codes & System Events

System Error 1: Configuration data error or missing project data in the operator panel memory.
Re-download the project configuration from SIMATIC ProTool to the OP3 via the MPI interface.
System Error 2: Communication connection to the PLC has been lost or cannot be established.
Check MPI/PROFIBUS cable connections, verify PLC address settings, and confirm the PLC is in RUN mode.
System Error 4: Incorrect or incompatible configuration file loaded onto the device.
Verify the ProTool project is compiled for the OP3 target device and re-transfer the correct configuration.
System Error 6: Operator panel hardware fault detected during self-test at startup.
Cycle power to the unit. If the fault persists, the panel hardware may require repair or replacement.
PLC No Connection: The OP3 cannot establish communication with the configured PLC on the MPI or PROFIBUS-DP network.
Verify bus termination resistors are correctly placed, check node addresses for conflicts, and inspect cable integrity.
Tag Limit Exceeded: The number of configured tags in the project exceeds the maximum supported by the OP3.
Reduce the number of tags in the ProTool project to within the OP3 limit and re-download the configuration.
Transfer Mode Active: The panel is in data transfer mode awaiting a project download and is not displaying the runtime application.
Initiate project transfer from the ProTool configuration PC, or press the appropriate key combination to exit transfer mode if no transfer is intended.

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 interfaces.

What software is used to configure the OP3 panel?

The OP3 is configured using Siemens SIMATIC ProTool software. WinCC flexible is not supported for this panel generation.

What is the supply voltage for the 6AV6321-1GC04-0MY0?

The panel operates on a 24 V DC supply voltage, typically sourced from a standard industrial power supply unit.

What is the front panel protection rating of the OP3?

The front panel of the OP3 carries an IP65 protection rating, making it suitable for installation in environments with dust and water spray exposure.

Can the OP3 display graphical content or images?

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

Troubleshooting

Display remains blank after power is applied

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

Ensure the power supply is providing stable 24 V DC. Inspect the wiring connections at the panel terminal. If voltage is correct and display remains blank, the internal display or power circuit may be faulty and the unit should be sent for repair.

OP3 shows 'No Connection' or communication error to PLC

Verify MPI or PROFIBUS-DP cable connections at both the panel and PLC ends. Check that bus termination resistors are installed only at the physical ends of the network segment. Confirm that the PLC node address in the ProTool project matches the actual PLC configuration.

Correct any wiring faults, adjust termination resistors as needed, and ensure address settings are consistent between the project and the PLC. Re-download the project if address changes were made.

Panel enters transfer mode unexpectedly at startup

The panel may have lost its project data due to a memory fault or the project was not successfully transferred previously. The unit defaults to transfer mode when no valid project is found in memory.

Re-transfer the ProTool project to the OP3 from the configuration PC via the MPI interface. Ensure the transfer completes without interruption before cycling power.

Keypad buttons do not respond or are intermittent

Inspect the membrane keypad surface for physical damage, contamination, or wear. Test each key in the ProTool simulation environment to determine if the issue is hardware or configuration related.

Clean the keypad surface with a dry cloth. If keys are physically damaged or the membrane is worn through, the keypad membrane or the entire panel front assembly will need to be replaced.

Configuration download fails from ProTool to the OP3

Check the MPI cable connection between the PC programming adapter and the OP3. Verify the panel is in transfer mode and that the correct COM port and transfer settings are selected in ProTool.

Ensure the PC adapter (e.g., PC/MPI adapter) is correctly installed and the driver is functioning. Retry the transfer with the panel in transfer mode. If the issue persists, try a different MPI cable or adapter.

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