Siemens 6AV6321-1DC04-0MY0 SIMATIC HMI OP3

Name: Siemens 6AV6321-1DC04-0MY0 SIMATIC HMI OP3
Brand: Siemens
SKU: 6AV6321-1DC04-0MY0
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1DC04-0MY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1DC04-0MY0 is an operator panel belonging to the SIMATIC HMI OP3 series, manufactured by Siemens. It is a compact, text-based operator panel designed for straightforward machine-level human-machine interface tasks. The OP3 provides a simple and cost-effective solution for displaying process values and entering operator commands in industrial automation environments.

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 PLCs. The panel operates on a 24 V DC supply and is configured using Siemens ProTool or WinCC flexible software. Its compact and robust construction is suited for panel-door mounting in industrial enclosures.

The SIMATIC OP3 is widely used in manufacturing, process automation, and machine building applications where a simple text-based interface is sufficient for operator interaction. It is particularly suited for small machines and systems where cost and space constraints make a full graphical HMI unnecessary. Industries such as packaging, material handling, and general factory automation commonly deploy this panel for basic status monitoring and parameter entry tasks.

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
Keypad	Membrane keypad
Mounting	Panel mounting
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
Configuration Software	ProTool, WinCC flexible
Series/Product Family	SIMATIC HMI OP3

Common Error Codes & System Events

System Event 1003: Communication error between OP3 and connected PLC. Connection to the controller has been lost.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC address settings and baud rate configuration match the OP3 project settings.
System Event 1004: Configured PLC address not found on the network.
Verify the PLC station address in the OP3 project matches the physical PLC MPI/PROFIBUS address. Check network cabling and bus termination.
System Event 1005: Project download error. Transfer of configuration data to the OP3 has failed.
Check the data transfer cable connection. Ensure the OP3 is in transfer mode and that the correct COM port and transfer settings are selected in ProTool or WinCC flexible.
System Event 1009: Illegal tag address. A configured tag references an address that does not exist in the connected PLC.
Review the tag configuration in the project and verify all PLC addresses are valid and within the configured data block or memory area.
System Event 1010: Write error. The OP3 was unable to write a value to the PLC.
Check PLC program for write protection on the target data area. Verify the PLC is in RUN mode and the communication link is active.
System Event 1011: Read error. The OP3 was unable to read a value from the PLC.
Verify the tag address exists in the PLC and the PLC is in RUN or RUN-P mode. Check communication cable and bus configuration.
System Event 1200: OP3 internal memory error detected during startup self-test.
Perform a factory reset of the OP3. If the error persists, the unit may require repair or replacement of internal memory components.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP3 (6AV6321-1DC04-0MY0)?

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?

The OP3 is configured using Siemens ProTool or WinCC flexible engineering software. Projects are downloaded to the panel via a serial data transfer cable.

What is the supply voltage for the 6AV6321-1DC04-0MY0?

The OP3 operates on a 24 V DC power supply.

What is the front panel protection rating of the OP3?

The front panel of the OP3 is rated to IP65, making it suitable for installation in environments where dust and water spray may be present.

Can the OP3 display graphical content or images?

No, the OP3 is a text-based operator panel only, capable of displaying alphanumeric characters on a 2-line, 16-character LCD. It does not support graphical or bitmap display content.

Troubleshooting

Display remains blank after power on

Measure the 24 V DC supply voltage at the power connector on the rear of the panel. Check for blown fuses or wiring issues in the control cabinet.

Restore correct 24 V DC supply voltage. If supply is confirmed correct and display remains blank, the internal power supply or LCD module may be faulty and the unit should be sent for repair.

OP3 shows communication error or cannot connect to PLC

Check the MPI or PROFIBUS DP cable between the OP3 and the PLC. Verify bus termination is correctly applied at both ends of the network segment.

Replace or reseat the communication cable. Confirm that the PLC station address, baud rate, and network settings in the OP3 project match the physical PLC configuration. Ensure bus termination resistors are active only at the two physical ends of the bus.

Project download to OP3 fails during transfer

Verify the OP3 is set to transfer mode by navigating to the transfer menu on the panel. Check the serial transfer cable connection between the PC and the OP3 data port.

Ensure the correct COM port is selected in ProTool or WinCC flexible and that the transfer baud rate matches. Try a different serial cable or USB-to-serial adapter if available. Confirm the PC COM port is functioning correctly.

Keypad buttons do not respond or are intermittent

Inspect the membrane keypad surface for physical damage, contamination, or deformation. Test each key systematically using a diagnostic screen in the OP3 project if available.

Clean the keypad surface with a dry cloth. If keys remain unresponsive, the membrane keypad assembly may be worn or damaged and requires replacement. Contact a qualified repair service for keypad replacement.

OP3 repeatedly restarts or enters a boot loop

Check the 24 V DC supply for voltage drops or instability under load. Inspect the project configuration for errors that may cause a runtime fault on startup.

Stabilize the power supply and ensure it is adequately rated for the panel. Reload the project using ProTool or WinCC flexible. If the issue persists after a fresh project download, perform a factory reset or send the unit for internal hardware inspection.

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