Recently, while working with an Allen Bradley 5/05 CPU, I encountered an "Unrecognized DTSA structure" message in the Node Editor on my PC. This issue arose after a power surge earlier in the week, which caused the fault light on the CPU to flash and the ENET light to remain solid instead of flashing as expected. After connecting directly to the CPU via Ethernet, I managed to reassign the original IP address and restore a backup program. Subsequently, I successfully pinged the CPU from my laptop, accessed it online, and reestablished connectivity with the router. However, despite the ENET light flashing properly and the run light showing green, RS Logix 500 continued to display a fault in the communication area. Upon inspecting the node settings in RS View, I noticed that the machine was configured identically to others in the program. Despite attempts to troubleshoot node settings for this specific machine, I encountered the same error message. Uncertain of the next steps, I am seeking advice on resolving this issue. Any insights would be greatly appreciated.
Upon connecting my laptop directly to the CPU, I no longer encounter the fault message in RS Logix 500. Despite this, the same fault persists when using the PC. I can still access the PC online using the respective IP address. This troubleshooting process has provided valuable insights into resolving the issue efficiently.
Based on your description, it seems likely that the power surge had a bigger impact than initially thought. It could have corrupted certain firmware settings or even some hardware components that affect communication. I believe you may need to consider upgrading the firmware of Allen Bradley 5/05 CPU, or worst case, replace the CPU. You could also try to reset the CPU to factory defaults before loading the backup program. If the issue persists, get in touch with RS or Allen Bradley’s technical support team - you may need professional assistance to reset DSA configurations.
This sounds like a tricky issue, but given my experience with Allen Bradley 5/05 CPUs, it might be worth checking the battery status and considering a replacement if it's weak or depleted. It seems that you've performed a decent range of troubleshooting steps already but have overlooked this. Fluctuations in power, like the surge you experienced, can sometimes cause problems with the battery. This can then lead to systemic issues like the one you're encountering. Of course, if the battery check doesn't do the trick, you might consider contacting Allen Bradley support or browsing through their forums for similar issues and potential solutions.
It sounds like you've already done a thorough job troubleshooting! One thing to check is whether there are any IP address conflicts on the network since that can sometimes cause communication errors. Additionally, double-check the node setups in RSLogix 500 and make sure that the hardware configurations match exactly with what’s in the program. Sometimes a subtle difference in settings can lead to these types of communication faults. If there's still no resolution, consider resetting the CPU to factory settings as a last resort, but just ensure you have a backup of your program. Good luck!
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Answer: Answer: The error could have been triggered by a power surge that affected the CPU, causing anomalies in its functioning.
Answer: Answer: Connecting directly to the CPU via Ethernet, reassigning the IP address, restoring a backup program, ensuring proper Ethernet connection, and checking node settings in RS View can help in troubleshooting this error.
Answer: Answer: There may be persistent issues with the node settings for the specific machine in RS View that need further troubleshooting to resolve the communication fault.
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