Hello everyone, I have recently embarked on a new challenge with Rockwell PLC at the age of 45 after using Schneider PLC's for a couple of decades. I am currently working on a project using an L72 PLC (for a L8X project) and an ENT module. Recently, I stumbled upon a pile of L72 PLCs at the office and decided to incorporate one into my setup. However, I encountered some issues with the new CPU not connecting via USB and displaying symbols on the EN2TR module. After some troubleshooting, I suspected the new CPU might be faulty. I tried swapping it with a working CPU on a different rack, but encountered a chassis error. This led me to believe that the rack itself may be faulty. I also faced challenges with uploading the project due to compatibility issues with redundancy settings. I am currently seeking advice on how to address the faulty backplane and the CPU's inability to accept a non-redundant configuration. Any insights or suggestions would be greatly appreciated. Thank you.
When trying to test the functionality of the "new" CPU, I placed it in the "working" rack and successfully detected it on USB. However, when attempting to download a project to it, a firmware upgrade from V20 to V34 was prompted, which I agreed to. The download initially appeared to be successful, but then failed, indicating that redundancy needed to be enabled. The CPU from a previous project with redundancy triggered me to check the redundancy settings, revealing that most modules in my rack were not configured for redundancy. After creating a new project with only a CPU and successfully uploading it to the PLC, I encountered a roadblock in my troubleshooting efforts. Researching online for solutions yielded no results after 2 hours. Any advice on dealing with a potentially faulty backplane or a CPU that does not support a "non-redundant" configuration would be greatly appreciated. Thank you. Update: I have since realized the importance of selecting the appropriate update type, although I find the pop-up prompt somewhat intrusive.
dalporto suggested determining the specific update needed to address the issue at hand. The annoying pop-up can be dismissed by clicking to expand. If unsure, try using ControlFlash(Plus) to flash the firmware, as it has an 85% success rate in resolving issues.
It sounds like you've done a fair bit of troubleshooting so far! Firstly, I'd agree that the redundant configuration wouldn't be expected to be accepted by a non-redundant CPU. Regarding the faulty backplane, I'd recommend checking for any visual signs of damage, such as burned components. Another way to test would be to try different slots with something like an output card to see if it’s potentially just one slot that’s issuing problems rather than the whole backplane. As for the compatibility issue with the L72 in redundant mode, Rockwell does have a backward compatibility mode, so ensure your firmware's compatibility. Lastly, don't rule out more subtle issues like your Ethernet cable or switch, because sometimes it's the simplest things that mess up a system. Good luck!
It seems like you've got quite a bit on your plate! From what you've described, it sounds like it could a hardware issue with your backplane, but firmware could also be a culprit, particularly when you're getting chassis errors. I would recommend you start by checking the compatibility matrix for your particular CPU and version of Studio 5000. For the non-redundant configuration, it's important to remember that L7x and L8x controllers handle redundancy differently. For an L8x, you need to use the "Redundancy" checkbox in the Controller Properties window instead of doing it through the Redundant System Manager. It might be worth investigating if this could be causing your upload issue. Let me know how it goes.
Welcome to the world of Rockwell PLCs, it's an interesting switch from Schneider. Your challenge sounds like a tough one. Regarding CPU connectivity, you might want to check the versions of both the ControlLogix firmware and the RSLogix 5000. Make sure they're compatible as some older versions tend to have issues with USB connections. On the topic of chassis error after swapping CPUs, there is a possibility the issue might be with a mismatch between the CPU and the backplane. Check if they are compatible with each other - this could help you understand if the problem you're experiencing is due to a faulty backplane or an incompatible CPU-Backplane arrangement. Lastly, about the non-redundant configuration, the settings in RSLogix 5000 must be in line with your CPU. If the CPU doesn't accept redundancy and your project settings incorporate this, it could lead to problems uploading the project. Adjusting the settings to match the capabilities of your CPU may help in resolving this issue. Good luck, and don't hesitate to post further questions or updates!
Hey there! It sounds like you've been navigating quite a few challenges with the Rockwell L72 and the ENT module. When it comes to the non-redundant configuration issue, have you checked the firmware versions on both the CPU and the rack? Sometimes compatibility problems can stem from version mismatches. As for the chassis error, it might be worth inspecting the backplane connections for any signs of damage or dust that could disrupt communication. If possible, trying another rack where the known good CPU was working might help isolate if the issue is with the backplane or the specific rack you’re using. Good luck, and keep us posted on how it goes!
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Answer: Answer: The issues with the USB connection and EN2TR module errors could be due to a faulty CPU or a faulty backplane.
Answer: Answer: Troubleshooting the symbols on the EN2TR module may involve checking for compatibility issues, swapping CPUs, and ensuring proper configuration settings.
Answer: Answer: Resolving a chassis error when swapping CPUs may involve investigating the possibility of a faulty rack and ensuring proper installation and connections.
Answer: Answer: To address compatibility issues with redundancy settings, you may need to adjust the configuration to accept a non-redundant setup or ensure proper settings are selected during the upload process.
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