Siemens 6AV6321-1CA04-0MY0 SIMATIC HMI OP3

Name: Siemens 6AV6321-1CA04-0MY0 SIMATIC HMI OP3
Brand: Siemens
SKU: 6AV6321-1CA04-0MY0
Price: 2495.00 EUR
Availability: InStock

€ 2.495,00

Condition

Clear

SKU: 6AV6321-1CA04-0MY0 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6321-1CA04-0MY0 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 applications. The OP3 provides basic operator control and monitoring functionality, making it suitable for installations where a full graphical display is not required.

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 unit 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-mount installation in industrial environments.

The SIMATIC OP3 is widely used in manufacturing, process automation, and machine building applications where basic parameter display and operator input are required. It is commonly found on small to mid-sized machines such as conveyor systems, packaging equipment, and general-purpose industrial machinery. Its compatibility with the SIMATIC S7 controller family makes it a practical choice for facilities already operating within the Siemens automation ecosystem.

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	ProTool, WinCC flexible
Mounting	Panel mount
Protection Rating (Front)	IP65
Protection Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Certifications	CE, UL
Series/Product Family	SIMATIC HMI OP3

Common Error Codes & System Events

Event ID: 10000: Connection to the PLC could not be established or was interrupted during operation.
Check MPI/PROFIBUS cable connections and termination resistors. Verify PLC address settings match the OP3 configuration. Ensure the PLC is powered and in RUN mode.
Event ID: 10001: Communication timeout detected on the configured PLC connection.
Check the physical communication cable for damage. Verify baud rate and bus address settings on both the OP3 and the connected PLC.
Event ID: 20000: Project download to the OP3 failed or project data is missing.
Re-download the project from ProTool or WinCC flexible to the OP3. Ensure the correct communication interface and transfer settings are selected.
Event ID: 40000: Operating system or firmware error detected on the OP3.
Perform a reset of the OP3 to factory defaults. If the fault persists, update the firmware using the appropriate Siemens service tool.
Event ID: 50000: Internal device error or hardware fault detected.
Power cycle the unit. If the error persists, the unit may require repair or replacement of internal components.
Event ID: 60000: Configuration error: a configured tag or variable address is invalid or cannot be found in the PLC.
Review the project configuration in ProTool or WinCC flexible and verify all PLC variable addresses are correct and accessible.

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. Projects are downloaded to the panel via the MPI interface.

What is the supply voltage for the 6AV6321-1CA04-0MY0?

The unit operates on a 24 V DC supply voltage.

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 panel-mount installations in environments with dust and water splash exposure.

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 content.

Troubleshooting

Display remains blank after power on

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

Ensure the power supply is functioning correctly and delivering stable 24 V DC. Replace the power supply or check wiring if voltage is absent or out of range.

OP3 cannot communicate with the connected PLC

Verify the MPI or PROFIBUS DP cable is correctly connected and terminated. Check that the bus address configured on the OP3 matches the project settings and does not conflict with other devices on the bus.

Correct any address conflicts, replace damaged cables, and ensure proper bus termination at both ends of the network. Re-download the project if configuration changes are made.

Project download fails from engineering PC to OP3

Confirm the correct communication interface (MPI) is selected in ProTool or WinCC flexible. Check the PC adapter cable connection and driver installation.

Reinstall the PC adapter driver, verify the correct COM port or USB adapter settings, and retry the download. Ensure the OP3 is in transfer mode before initiating the download.

Operator keypad buttons are unresponsive

Inspect the membrane keypad for physical damage or contamination. Check if the issue is present in all keys or only specific ones.

Clean the keypad surface carefully. If individual keys are permanently unresponsive, the membrane keypad assembly may need to be replaced.

OP3 displays repeated communication error messages during operation

Monitor the MPI/PROFIBUS bus for noise or signal integrity issues. Check cable lengths do not exceed the maximum specified for the selected baud rate.

Reduce cable length if necessary, add proper bus termination, use shielded cables, and ensure cable shielding is correctly grounded at one end to reduce electromagnetic interference.

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