Siemens 6AV6321-1CA23-1MY0 SIMATIC OP3

Name: Siemens 6AV6321-1CA23-1MY0 SIMATIC OP3
Brand: Siemens
SKU: 6AV6321-1CA23-1MY0
Price: 1995.00 EUR
Availability: InStock

€ 1.995,00

Condition

Clear

SKU: 6AV6321-1CA23-1MY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1CA23-1MY0 is an operator panel (OP3) belonging to the SIMATIC HMI family, designed for compact machine-level operator control and monitoring. This unit provides a text-based display interface for use with Siemens SIMATIC S7 and S5 PLCs, as well as third-party controllers. It is a cost-effective solution for applications requiring basic process visualization and operator input without the need for a graphical display.

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 into Siemens automation networks. The unit is powered by 24 V DC and is designed for panel mounting, with a compact form factor suited to space-constrained control cabinets. Configuration is performed using ProTool software.

The SIMATIC OP3 is widely used in manufacturing, packaging, and process automation environments where simple text-based status display and parameter entry are sufficient. It is particularly suited for machine-level HMI tasks such as displaying fault messages, setpoint entry, and operational status on standalone machines or production lines. Its compatibility with the SIMATIC S7-200, S7-300, and S7-400 PLC families makes it a common choice for retrofitting and upgrading older control systems.

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
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
PLC Compatibility	SIMATIC S7-200, S7-300, S7-400, S5
Certifications	CE, UL

Common Error Codes and System Messages

Event ID: 10000: Communication error between OP3 and connected PLC. The operator panel cannot establish or maintain a connection to the controller.
Check MPI or PROFIBUS-DP cable connections and termination resistors. Verify the PLC address settings match the OP3 configuration. Ensure the PLC is in RUN mode.
Event ID: 10001: Configured PLC address not found on the network. The OP3 cannot locate the target controller at the specified network address.
Verify the MPI or PROFIBUS address configured in ProTool matches the physical PLC address. Check network cabling and bus termination.
Event ID: 20000: Project download error. Transfer of the configuration project from the programming device to the OP3 has failed.
Check the data transfer cable connection. Ensure the OP3 is in transfer mode before initiating download. Verify ProTool project compatibility with the OP3 firmware version.
Event ID: 40000: Internal device error. A hardware or firmware fault has been detected within the OP3.
Cycle power to the OP3. If the error persists, perform a factory reset. If the fault remains, the unit may require repair or replacement.
System Message: WAIT: The OP3 is waiting to establish communication with the configured PLC. Displayed at startup before a connection is confirmed.
Verify PLC is powered and in RUN mode. Check network cabling and address configuration. Allow sufficient time for the network to initialize.
System Message: OFFLINE: The OP3 has lost communication with the PLC during operation.
Check MPI/PROFIBUS cable integrity and connectors. Verify PLC is still running. Restore communication and cycle power to the OP3 if necessary.
System Message: MEMORY ERROR: An error has been detected in the OP3 internal memory, possibly due to data corruption or a failed configuration transfer.
Re-download the ProTool project to the OP3. If the error persists, perform a factory reset and re-download. Replace the unit if memory errors continue.

Frequently Asked Questions

Which communication protocols does the OP3 (6AV6321-1CA23-1MY0) support?

The OP3 supports MPI (Multi-Point Interface) and PROFIBUS-DP protocols, allowing direct connection to SIMATIC S7 and S5 PLCs as well as compatible third-party controllers.

What software is used to configure the SIMATIC OP3?

The OP3 is configured using Siemens ProTool configuration software. Projects are downloaded to the device via a PC adapter or MPI cable.

What is the supply voltage for the 6AV6321-1CA23-1MY0?

The OP3 requires a 24 V DC power supply for operation.

Is the OP3 compatible with SIMATIC S7-1200 or S7-1500 PLCs?

The OP3 was designed primarily for use with SIMATIC S7-200, S7-300, and S7-400 PLCs. Compatibility with S7-1200 and S7-1500 is not natively supported; newer HMI panels such as the KTP series are recommended for those controllers.

What is the front panel protection rating of the OP3?

The OP3 front panel carries an IP65 protection rating, making it suitable for panel mounting in environments where dust and water spray may be present.

Troubleshooting

Display remains blank after power on

Check that 24 V DC is present at the power supply terminals of the OP3. Inspect the supply cable and connector for damage or loose connections.

Restore correct 24 V DC supply. If voltage is confirmed but display remains blank, the internal power circuitry or display may be faulty and the unit should be inspected or repaired.

OP3 displays WAIT or OFFLINE continuously and does not connect to PLC

Verify the MPI or PROFIBUS-DP cable is securely connected at both the OP3 and PLC ends. Check that bus termination resistors are correctly installed at both ends of the network segment.

Correct any cabling or termination issues. Confirm that the PLC network address in the ProTool project matches the physical PLC address. Ensure the PLC is powered and in RUN mode.

Configuration download from ProTool fails or is interrupted

Check the PC-to-OP3 transfer cable connection. Confirm the OP3 is set to transfer mode by pressing the appropriate key combination at startup. Verify the ProTool version is compatible with the OP3 firmware.

Re-seat the transfer cable and retry the download. Update ProTool or OP3 firmware if a version mismatch is identified. If download consistently fails, test with a known-good cable.

Keypad buttons do not respond or produce incorrect input

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

Clean the keypad surface with a dry cloth. If individual keys are unresponsive due to membrane damage, the keypad assembly or the entire unit may need to be replaced.

Alarm or message texts display incorrectly or show garbled characters

This typically indicates a corrupted or incompatible project loaded on the OP3, or a mismatch between the configured character set and the display.

Re-download the correct ProTool project to the OP3. Verify that the character set and language settings in the project are appropriate for the OP3 hardware variant.

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