Siemens 6AV6640-0CA11-0AX1 OP 73micro

Name: Siemens 6AV6640-0CA11-0AX1 OP 73micro
Brand: Siemens
SKU: 6AV6640-0CA11-0AX1
Availability: InStock

Price range: € 365,00 through € 1.053,50

Condition

Clear

SKU: 6AV6640-0CA11-0AX1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6640-0CA11-0AX1 is the OP 73micro operator panel, part of the SIMATIC HMI Micro Panel family from Siemens. This compact text-based operator panel is designed for straightforward machine-level operator control and monitoring tasks. It is a cost-effective solution for applications requiring basic HMI functionality without the need for graphical display capabilities.

The OP 73micro features a 3-line text display capable of showing alphanumeric characters, with a membrane keypad for operator input. It communicates via a PPI/MPI interface, making it directly compatible with SIMATIC S7-200 PLCs. The panel operates on a 24 V DC supply and is designed for panel front mounting with an IP65 protection rating on the front face, providing resistance to dust and water ingress in industrial environments.

The OP 73micro is typically deployed in small machinery, conveyor systems, packaging equipment, and other applications where a compact, low-cost operator interface is sufficient. Its compatibility with the S7-200 PLC family makes it a natural fit for standalone machine control systems in manufacturing and process industries. The panel is configured using SIMATIC WinCC flexible Micro engineering software.

Technical Specifications

Display Type	Text LCD
Display Lines	3 lines
Characters per Line	12 characters
Input/Operating Voltage	24 V DC
Power Consumption	2.5 W
Communication Interface	PPI/MPI (RS-485)
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
Relative Humidity	10% to 90% (non-condensing)
Mounting	Panel front mounting
Certifications	CE, UL
Engineering Software	SIMATIC WinCC flexible Micro

Common Error Codes & System Events

System Error 1: Configuration data error or corrupted project data on the panel
Re-transfer the project from WinCC flexible Micro to the panel. Ensure the project was compiled without errors before transfer.
System Error 2: Communication error between the OP 73micro and the connected S7-200 PLC
Check the RS-485 cable connections and termination resistors. Verify the MPI/PPI address settings match the project configuration.
No Connection: The panel cannot establish a connection to the configured PLC
Verify PLC is powered and running. Check cable integrity and connector pins. Confirm baud rate and station address settings in the project.
Transfer Mode: Panel is waiting for a project transfer from the engineering PC
Initiate project download from WinCC flexible Micro, or restart the panel to exit transfer mode if no transfer is intended.
Overflow: Tag value exceeds the configured display range for a field
Check the PLC data values and the configured limits for the display field in the WinCC flexible Micro project. Adjust limits or correct PLC logic.
Update Cycle Exceeded: The panel update cycle time has been exceeded due to communication load
Reduce the number of active tags or increase the update cycle time in the project configuration to reduce communication bus load.

Frequently Asked Questions

Which PLCs are compatible with the OP 73micro?

The OP 73micro is designed for use with SIMATIC S7-200 PLCs via the PPI/MPI protocol over an RS-485 interface. It is not natively compatible with S7-300 or S7-400 PLCs.

What software is used to configure the 6AV6640-0CA11-0AX1?

The OP 73micro is configured using SIMATIC WinCC flexible Micro, which is the entry-level version of the WinCC flexible engineering software suite.

What is the front panel protection rating of this operator panel?

The front face of the OP 73micro carries an IP65 protection rating, making it resistant to dust ingress and low-pressure water jets.

Can the OP 73micro display graphical content or images?

No, the OP 73micro is a text-only panel with a character-based LCD display. It does not support graphical screens or bitmap images.

What is the supply voltage required for the 6AV6640-0CA11-0AX1?

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

Troubleshooting

Display remains blank after power on

Check the 24 V DC supply voltage at the power connector on the rear of the panel using a multimeter. Verify polarity is correct.

Ensure the power supply is within the 24 V DC specification and that the connector is firmly seated. If voltage is correct and display remains blank, the internal LCD or power circuit may be faulty and the unit should be repaired or replaced.

Panel shows 'No Connection' or fails to communicate with S7-200 PLC

Inspect the RS-485 cable between the panel and the PLC for damage or loose connectors. Verify the PPI address and baud rate configured in the project match the PLC settings.

Replace or reseat the communication cable. Correct any address or baud rate mismatches in the WinCC flexible Micro project and re-transfer to the panel. Ensure bus termination is correctly applied at both ends of the cable.

Project transfer from PC to panel fails

Confirm the panel is in transfer mode. Check the PC-to-panel cable (typically a PC/PPI cable or USB-PPI adapter) and verify the correct COM port is selected in WinCC flexible Micro.

Restart the panel and select transfer mode manually if required. Replace the PC/PPI cable if it is suspected to be faulty. Ensure the correct communication port and baud rate are set in the transfer settings of WinCC flexible Micro.

Keypad buttons are unresponsive or intermittent

Inspect the membrane keypad for physical damage, contamination, or deformation. Test each key systematically using a diagnostic screen in the 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 the panel should be sent for repair or the keypad replaced.

Panel repeatedly restarts or resets unexpectedly

Check the stability of the 24 V DC power supply under load. Voltage dips below the minimum threshold can cause the panel to reset. Also check for loose power connector contacts.

Use a stable, adequately rated 24 V DC power supply. Secure all connector contacts. If the issue persists with a known-good power supply, the internal power regulation circuitry may be faulty and the unit requires repair.

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