Troubleshooting S7 400 and Citect Ethernet Connection Issue

Question:

I have successfully backed up my Citect and PLC systems, and now I am looking to create a backup PC station. After installing Windows XP and Somatic Net v6.0 and importing the XDB file, I have completed the configuration for the PC station. However, I am unable to establish communication with Citect. When using the S7 Connection Diagnostic app, the message "Not Used" is displayed. Your urgent assistance in resolving this issue would be greatly appreciated. Thank you.

Top Replies

Can you provide an update on the 'Station Configuration editor' in Citect? If you are using an Ethernet connection, you may be able to easily transfer the configuration from an old PC to a virtual PC by bridging the virtual ethernet adapter with a physical one. This urgent assistance is needed to address this issue. Click for more information. Asking for such help is crucial for improving productivity.

I received a congratulatory message from the station, and I've also confirmed the online status on NCM PC, which is displaying as "OK."

Show us the setup in Citect - click here for more details.

It seems like you've done the groundwork well so far. This communication issue might be due to a firewall rule on the PC station blocking communication, or a mismatched software version between your PC station and Citect. I would recommend double-checking the firewall settings and making sure that all software versions are compatible. You might also want to verify the IP address and port configurations as they are crucial for proper communication establishment.

It seems like you've done a thorough job on the initial tasks with your Citect and PLC systems backup! As for your problem with the S7 Connection Diagnostic app, it might be related to your configuration settings. Make sure you have the correct TCP/IP settings on both the PC station and the PLC, as any discrepancy can lead to communication errors. Also, check that the MLFB number in the hardware configuration of your Step7 software is correct. Finally, ensure that the correct port is set for communication in the PG/PC interface. Hope this helps and keep us updated on your progress.

It sounds like you've made great progress with your setup! Since “Not Used” appears in the S7 Connection Diagnostic app, it could indicate that your hardware settings might not be matching your configurations in Citect. Double-check the communication settings in both Citect and the Somatic Net configuration, ensuring that the PLC network addresses and ports align properly. Also, confirm that the required drivers for your PLC and any necessary licenses are correctly installed. If everything looks good, a power cycle of the network devices can sometimes clear up these connection issues. Good luck!

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Frequently Asked Questions (FAQ)

FAQ: 1. Why am I unable to establish communication between Citect and the PLC system after configuring a backup PC station?

Answer: - It is possible that there may be an issue with the network settings or configuration. Double-check the network settings in both Citect and the PLC system to ensure they are correctly configured.

FAQ: 2. What does the message "Not Used" in the S7 Connection Diagnostic app indicate?

Answer: - The message "Not Used" in the S7 Connection Diagnostic app may suggest that there is a communication issue between the PC station and the PLC system. It could be related to network settings, cables, or configuration errors.

FAQ: 3. How can I troubleshoot the Ethernet connection issue between the S7 400 and Citect systems?

Answer: - Start by verifying the network settings, IP addresses, and communication protocols in both the PLC system and Citect software. Ensure that the hardware connections are secure and that there are no firewall or security settings blocking communication. If the issue persists, consider reviewing the documentation or seeking assistance from technical support.

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