Siemens 6AV6321-1EC03-1CY0 SIMATIC OP3

Name: Siemens 6AV6321-1EC03-1CY0 SIMATIC OP3
Brand: Siemens
SKU: 6AV6321-1EC03-1CY0
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1EC03-1CY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1EC03-1CY0 is an operator panel belonging to the SIMATIC OP3 series, manufactured by Siemens as part of the SIMATIC HMI product line. It is a compact text-based operator panel designed for straightforward machine-level human-machine interface tasks. The OP3 provides a simple, robust interface for displaying process values and entering operator commands in industrial environments.

The SIMATIC 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) or PROFIBUS DP protocol, enabling direct connection to Siemens SIMATIC S7 PLCs. The unit operates on a 24 V DC supply and is designed for panel mounting with a compact footprint, making it suitable for space-constrained control cabinets. Configuration is performed using Siemens ProTool or WinCC flexible software.

The OP3 is commonly deployed in manufacturing, packaging, and process automation applications where a cost-effective, text-based operator interface is sufficient. It is well-suited for small machines and standalone equipment requiring basic status display and parameter entry without the need for graphical visualization. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 controller families makes it a practical choice for a wide range of automation tasks.

Technical Specifications

Display Type	LCD, 2-line text display
Display Characters	2 lines x 20 characters
Input/Operating Voltage	24 V DC
Communication Interface	MPI / PROFIBUS DP
Configuration Software	ProTool / WinCC flexible
Mounting	Panel mounting
IP Rating (Front)	IP65
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10 % to 90 %, non-condensing
Certifications	CE, UL
Series/Product Family	SIMATIC OP3

Common Error Codes & System Events

Event ID: 10000: Connection to PLC could not be established. Communication link between OP3 and the configured controller is not active.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the PLC address and baud rate settings match the OP3 configuration.
Event ID: 10001: Connection to PLC interrupted. An existing communication connection has been lost during operation.
Inspect cable integrity and connector seating. Check PLC operating state and restart communication if necessary.
Event ID: 10002: No project loaded on the device. The OP3 has no valid configuration project in memory.
Download a valid project to the OP3 using ProTool or WinCC flexible via the configured transfer connection.
Event ID: 20000: System error on the operator panel. An internal firmware or hardware fault has been detected.
Perform a power cycle. If the error persists, reload the firmware and project. Replace the unit if the fault continues.
Event ID: 40000: Transfer mode active. The OP3 is waiting for a project download from the configuration PC.
Initiate project transfer from ProTool or WinCC flexible, or press the appropriate key combination to exit transfer mode if unintended.
Event ID: 10006: Configured PLC address not found on the bus. The OP3 cannot locate the controller at the specified MPI or PROFIBUS address.
Verify the PLC MPI/PROFIBUS address in the hardware configuration and ensure it matches the address set in the OP3 project.
Event ID: 10010: Tag read/write error. The OP3 was unable to read from or write to a configured PLC data address.
Check that the PLC data block or memory address referenced in the OP3 project exists and is accessible in the PLC program.

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?

The OP3 is configured using Siemens ProTool or WinCC flexible engineering software. The project is then transferred to the panel via the MPI interface.

What is the supply voltage for the 6AV6321-1EC03-1CY0?

The unit operates on a 24 V DC power supply.

What is the front panel protection rating of the OP3?

The OP3 front panel carries an IP65 protection rating, making it resistant to dust and water jets when correctly installed in a panel cutout.

Can the OP3 display graphical content?

No, the OP3 is a text-based operator panel with a 2-line alphanumeric LCD display and does not support graphical visualization.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify polarity and measure actual voltage under load.

Ensure the supply voltage is within the specified 24 V DC range. Replace the power supply or check wiring if voltage is absent or out of tolerance.

OP3 cannot establish communication with the PLC

Verify MPI or PROFIBUS DP cable connections, bus termination at both ends, and that the baud rate and station addresses are correctly configured on both the OP3 and the PLC.

Correct any address or baud rate mismatches in the OP3 project and PLC hardware configuration. Replace the communication cable if continuity testing reveals a fault.

Project transfer from PC to OP3 fails

Confirm the OP3 is in transfer mode and that the correct communication interface and PC adapter (e.g., PC Adapter MPI) are selected in the configuration software.

Set the OP3 to transfer mode manually, verify the PC adapter driver installation, and retry the download. Check cable integrity between the PC adapter and the OP3 MPI port.

Operator keypad inputs are not responding

Inspect the membrane keypad for physical damage or contamination. Attempt to navigate menus to determine if specific keys or all keys are unresponsive.

Clean the keypad surface. If individual keys are permanently unresponsive due to membrane damage, the operator panel front assembly or the complete unit may require replacement.

OP3 repeatedly resets or reboots during operation

Monitor the 24 V DC supply for voltage dips or ripple under load, which can cause the panel to reset. Also check for loose power connector contacts.

Stabilize the power supply and ensure adequate current capacity. Secure all connector contacts. If resets continue with a stable supply, the unit may have an internal hardware fault requiring repair or replacement.

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