Siemens 6AV6321-1CA03-1CY0 SIMATIC OP3

Name: Siemens 6AV6321-1CA03-1CY0 SIMATIC OP3
Brand: Siemens
SKU: 6AV6321-1CA03-1CY0
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6321-1CA03-1CY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1CA03-1CY0 is an operator panel (OP3) belonging to the SIMATIC HMI product family. It is a compact, text-based operator panel designed for straightforward machine-level operation and monitoring tasks. This unit is manufactured by Siemens and is part of the classic SIMATIC HMI panel range, intended for integration into control cabinets and machine panels.

The OP3 features a 2-line LCD text display capable of showing alphanumeric characters, providing clear process status information to operators. It communicates via the MPI (Multi-Point Interface) and PROFIBUS DP protocols, enabling direct connection to SIMATIC S7-200, S7-300, and S7-400 PLCs. The panel includes a membrane keypad with function keys for operator input, and is configured using the ProTool or WinCC flexible software packages. It operates on a 24 V DC supply and is built to withstand typical industrial environments.

The SIMATIC OP3 is commonly deployed in manufacturing, packaging, and process automation applications where a cost-effective, compact HMI solution is required. It is well-suited for small to medium-sized machines where text-based status display and basic operator input are sufficient. Industries such as food and beverage, automotive assembly, and general factory automation frequently use this panel for local machine control interfaces.

Technical Specifications

Display Type	LCD, 2-line text
Display Characters	2 x 20 characters per line
Input/Operating Voltage	24 V DC
Power Consumption	3 W (typical)
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 Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Configuration Software	ProTool, WinCC flexible
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400
Certifications	CE, UL

Common Error Codes & System Events

Event ID: 10000: Communication error between the OP3 and the connected PLC. The panel cannot establish or maintain a connection via MPI or PROFIBUS DP.
Check MPI/PROFIBUS cable connections and termination resistors. Verify the PLC address settings match the OP3 configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Connection to the PLC was interrupted during operation.
Inspect the communication cable for damage or loose connectors. Check bus termination and cable shielding. Restart the OP3 and PLC if the connection is not restored automatically.
Event ID: 20000: Configuration error detected. The project loaded on the OP3 is incompatible or corrupt.
Re-download the project from ProTool or WinCC flexible to the OP3. Verify the project was compiled without errors before transfer.
Event ID: 20001: No project found in the OP3 memory. The panel starts without a valid configuration.
Connect the OP3 to a PC with ProTool or WinCC flexible and download a valid project to the device.
Event ID: 30000: Internal device error or hardware fault detected during self-test at startup.
Perform a power cycle. If the error persists, check the 24 V DC supply voltage. Contact Siemens technical support or arrange for unit repair/replacement.
Event ID: 40000: Operating voltage out of range. The 24 V DC supply voltage is too low or too high.
Measure the supply voltage at the OP3 power connector. Ensure the supply is within the specified 24 V DC tolerance range. Check the power supply unit and wiring.

Frequently Asked Questions

Which PLCs are compatible with the SIMATIC OP3 (6AV6321-1CA03-1CY0)?

The OP3 is compatible with SIMATIC S7-200, S7-300, and S7-400 PLCs via MPI or PROFIBUS DP communication interfaces.

What software is used to configure and program the OP3?

The OP3 is configured using Siemens ProTool or WinCC flexible software. Projects are created on a PC and downloaded to the panel via the MPI interface.

What is the display capability of the OP3?

The OP3 has a 2-line LCD text display, each line capable of showing up to 20 alphanumeric characters. It does not support graphical content.

What is the supply voltage required for the OP3?

The OP3 requires a 24 V DC power supply. Ensure the supply is stable and within the specified tolerance range for reliable operation.

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 where dust and water spray may be present.

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector. Verify the supply polarity is correct and the voltage is within specification.

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

OP3 displays communication error or cannot connect to PLC

Verify the MPI or PROFIBUS DP cable is properly connected at both the OP3 and PLC ends. Check bus termination resistors are correctly placed at both ends of the bus segment.

Replace or reseat the communication cable. Correct the bus address settings in the OP3 project to match the PLC configuration. Ensure only the two physical ends of the bus have termination resistors enabled.

OP3 starts without a project or shows configuration missing message

The internal memory may have lost the project due to a power interruption during download or memory corruption.

Reconnect the OP3 to a PC running ProTool or WinCC flexible and re-download the project. Ensure a stable power supply is maintained during the transfer process.

Function keys do not respond to operator input

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

Clean the keypad surface. If keys remain unresponsive, the membrane keypad assembly may require replacement. Arrange for hardware repair or unit exchange.

OP3 repeatedly resets or reboots during operation

Monitor the 24 V DC supply voltage for instability or voltage dips. Check for excessive electrical noise on the supply line or communication bus.

Install a stable, adequately rated 24 V DC power supply. Add appropriate filtering or shielding to the power and communication cables. If reboots persist, the unit may have an internal hardware fault requiring repair.

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