Good morning! We recently encountered a communication issue with a 1756-L62 processor in our second episode within a span of four weeks. Despite changing the Power Supply, Backplane, and other components, the problem persisted. Rockwell provided Technical Note ID 41204, which highlighted a noise issue in 1756 modules manufactured between September 2006 and June 2007. The note mentioned a potential failure in modules with an ATMEL stamped on the ASIC component. In case of failure, specific slots display faults, while others remain unaffected. RS Linx only detects the Processor and 1756-ENBT module. Have you encountered a similar situation before? Any assistance would be greatly appreciated. Thank you.
What is the correct power supply size for part number L62? There seems to be a discrepancy as the initial statement refers to L62, while later on, L61 is mentioned.
Apologies, but I can only offer the 1756-L62 Power Supply alongside the 1756-PB72.
To increase computer performance and troubleshoot issues, try removing all modules except the CPU and reinstalling them one by one. This step-by-step method can help identify any faulty modules causing system errors. By carefully testing each module individually, you can ensure optimal hardware functionality.
Why is it important to continue this process? It seems like we're caught in a cycle of repeating the same actions over and over again - a classic case of insanity, right? LOL.
A few weeks ago, there was a discussion about similar issues involving a 1756-L6x SERCOS module and all other modules showing faults. Upon reviewing Cydog's post history, it seems like the current situation is just a coincidence. The question of "why do I have to keep troubleshooting" may seem rhetorical, but it's essential to continue troubleshooting until the problem is identified and resolved. Using a basic process of elimination can help pinpoint the issue. If the CPU and backplane are ruled out, and the problem has not occurred in a decade, it's likely the 1756 SERCOS module causing the malfunction. These modules have a more advanced backplane interface compared to I/O modules, and a malfunction in the backplane chip can disrupt communication with other modules and the CPU or Ethernet.
I've actually encountered a similar issue in the past with a 1756-L62 processor. Beyond what you've already done with changing supplies and backplane, I remember we also needed to replace the ASIC component that had an ATMEL stamp too. It seemed like an isolated manufacturing defect and since we've replaced that particular component, we haven't really had any more issues. Also make sure to update your firmware, it could help with the RS Linx detection issue you're having. Hope that helps and good luck!
Hey there, I have indeed come across a similar issue before. In our case, one slot was consistently faulting while others were operating as expected. We too had gone through replacing components before finding out that the issue was stemming from a defective ASIC component in the about the same manufacture period you mentioned. Once we replaced that part, things started running smoothly again. I recommend focusing on the ASIC component of the 1756 modules–you're likely to see some improvement once that's sorted out. Best of luck!
Hello! It sounds like you've already been quite thorough in your troubleshooting process. While I haven't had this exact issue with the 1756-L62 processor, I've dealt with something similar in the past. It might be possible that the problem lies within the communication module. Try inspecting it for any signs of wear and tear, particularly burnt or scorched areas. Also, consider swapping it with a known good module for a quick test. If the issue is in fact noise, trying some isolation measures like ferrite beads or shielded cabling could also help. If none of these options work, it might be prudent to reach out to Rockwell for further support, mentioning the failed attempts at solving the issue. Best of luck!
I've encountered a strikingly similar issue before. It seems you've used the process of elimination pretty meticulously, but did you check the firmware? Sometimes, the firmware versions can conflict and cause unexpected problems. In my case, downgrading the firmware actually solved the issue. Also, if your module falls within the mentioned manufacturing date range and has the ATMEL stamp, you might consider replacing it too, as those were known to have an inherent defect. Lastly, remember that the environment, including ambient temperature and electrical noise, can significantly impact module performance. Your problem sounds intricate, but I hope this steer in the right direction may help.
Good morning! I’ve dealt with similar communication issues before, and it can be frustrating, especially when you’ve already replaced so many components. It sounds like you’ve narrowed it down pretty well. Have you checked if the other modules in the backplane are also affected? Sometimes issues with those can cause communication problems that seem to be localized to the processor. Additionally, if the Technical Note you received from Rockwell related to the ASIC component is applicable, you might want to consider reaching out to them again for more guidance or possible workaround solutions. Good luck!
Good morning! It sounds like you've already done a lot of troubleshooting, so that's great. I had a similar experience with a 1756 module, and it turned out to be a bad ASIC chip as mentioned in that technical note. If you haven't already, I'd recommend checking for any physical signs of damage or corrosion on the affected modules, as that could have contributed to the communication issues. Sometimes, reseating the affected modules can also help, so it's worth a shot. Good luck, and I hope you get it sorted out soon!
Good morning! I’ve encountered a similar issue with a 1756-L62 processor in the past, and it turned out to be related to those noisy modules mentioned in the technical note. In my case, replacing the affected modules resolved the communication errors. It may be worth double-checking the module versions you’re using, especially the ASIC components. Also, consider reviewing your wiring and grounding, as sometimes external noise can affect performance even if the equipment seems fine. Hope you get it sorted out!
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Answer: Answer: Communication problems with the 1756-L62 processor could be due to a noise issue in modules manufactured between September 2006 and June 2007, as highlighted in Technical Note ID 41204.
Answer: Answer: Modules with an ATMEL stamped on the ASIC component may be prone to failure, as mentioned in the technical note. Specific slots may display faults while others remain unaffected.
Answer: Answer: RS Linx may only detect specific components due to communication issues related to the 1756-L62 processor and the affected modules.
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