Siemens 6AV6640-0AA00-0AX1 OP 73micro

€ 226,00

SKU: 6AV6640-0AA00-0AX1 Category: HMI & Display Brand: Siemens

Description
Additional information

The Siemens 6AV6640-0AA00-0AX1 is the OP 73micro operator panel, part of the SIMATIC HMI Micro Panel family. It is a compact, text-based operator panel designed for simple machine-level human-machine interface tasks. This unit provides a straightforward interface for displaying process values and entering operator commands in space-constrained control cabinet installations.

The OP 73micro features a 3-line LCD text display capable of showing alphanumeric characters, with a membrane keypad for operator input. It communicates via a PPI/MPI interface, making it compatible with SIMATIC S7-200 PLCs. The panel operates on 24 V DC supply voltage and is configured using the WinCC flexible Micro engineering software. It supports a limited number of screens, variables, and alarms suited to its role as a basic operator terminal.

The OP 73micro is commonly deployed in small-scale automation systems, packaging machinery, conveyor systems, and simple process control applications. Its compact form factor and low cost make it suitable for OEM machine builders who require basic operator interaction without the overhead of a full graphical HMI. It is particularly well-suited to applications already using the SIMATIC S7-200 PLC platform.

Technical Specifications

Display Type	LCD text display
Display Lines	3 lines
Characters per Line	12 characters
Input/Operating Voltage	24 V DC
Communication Interface	PPI / MPI (RS-485)
Engineering Software	WinCC flexible Micro
Number of Screens	Up to 5
Number of Variables	Up to 20
Number of Alarms	Up to 20
Operating Temperature	0 °C to +50 °C
Storage Temperature	-20 °C to +60 °C
IP Rating (Front)	IP65
IP Rating (Rear)	IP20
Mounting	Panel mounting
Certifications	CE, UL
PLC Compatibility	SIMATIC S7-200

Common Error Codes & System Events

Communication Error: Loss of communication between the OP 73micro and the connected S7-200 PLC via PPI/MPI interface.
Check RS-485 cable connections and termination resistors. Verify PPI/MPI address settings on both the panel and PLC. Ensure baud rate settings match.
Configuration Error: The configuration loaded on the panel does not match the connected PLC or is corrupt.
Re-download the project from WinCC flexible Micro to the panel. Verify the correct PLC type and communication parameters are set in the project.
Tag Read Error: The panel cannot read one or more configured variables (tags) from the PLC.
Verify that the PLC addresses referenced in the WinCC flexible Micro project exist and are accessible. Check that the PLC program is running.
Tag Write Error: The panel cannot write a value to a configured variable in the PLC.
Check that the target PLC address is not write-protected and is within the valid address range. Verify communication link integrity.
Alarm Buffer Overflow: The alarm buffer on the panel has exceeded its capacity.
Acknowledge and clear pending alarms. Review the alarm configuration in WinCC flexible Micro to reduce unnecessary alarm triggers.
Power Supply Fault: The panel is not receiving adequate 24 V DC supply voltage.
Measure the supply voltage at the panel power connector. Ensure voltage is within the specified 24 V DC range. Check wiring and power supply unit output.

Frequently Asked Questions

Which PLCs are compatible with the OP 73micro?

The OP 73micro is designed to communicate with SIMATIC S7-200 PLCs via the PPI/MPI (RS-485) interface. It is not natively compatible with S7-300 or S7-400 PLCs.

What software is required to configure the OP 73micro?

The OP 73micro is configured using Siemens WinCC flexible Micro engineering software. Projects are downloaded to the panel via the RS-485 programming cable.

What is the supply voltage for the 6AV6640-0AA00-0AX1?

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

What is the IP protection rating of the OP 73micro?

The front face of the OP 73micro is rated IP65, providing protection against dust and water jets. The rear of the unit is rated IP20.

How many screens and variables can the OP 73micro support?

The OP 73micro supports up to 5 process screens and up to 20 variables, reflecting its role as a basic entry-level operator panel.

Troubleshooting

Display remains blank after power on

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

Ensure the power supply is within the specified 24 V DC range. If voltage is correct and display remains blank, the internal power circuitry or LCD may be faulty and the unit should be repaired or replaced.

Panel shows communication error or no connection to PLC

Inspect the RS-485 cable between the OP 73micro and the S7-200 PLC for damage or loose connections. Verify the PPI address and baud rate configured in WinCC flexible Micro match the PLC settings.

Replace or reseat the RS-485 communication cable. Correct any address or baud rate mismatches in the project configuration and re-download to the panel. Check that bus termination is correctly applied.

Keypad buttons not responding or responding incorrectly

Test each key individually in a diagnostic or commissioning mode if available. Inspect the membrane keypad for physical damage, contamination, or delamination.

Clean the keypad surface. If keys remain unresponsive, the membrane keypad assembly may need replacement. On refurbished units, inspect the keypad ribbon cable connection to the main PCB.

Project download fails from WinCC flexible Micro

Verify the correct programming cable (PC/PPI cable) is being used and is properly connected. Check the COM port settings in WinCC flexible Micro match the PC serial port configuration.

Use the correct Siemens PC/PPI cable for the OP 73micro. Ensure the COM port and transfer rate settings are correctly configured. Try a different USB-to-serial adapter if using a USB converter.

Displayed values are incorrect or not updating

Check that the PLC program is running and writing to the correct addresses referenced in the HMI project. Verify variable address mapping in WinCC flexible Micro.

Correct any address mismatches between the PLC program and the HMI variable configuration. Re-download the updated project to the panel and restart both the PLC and panel.

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