Hello everyone, I am experiencing a problem with saving a modified value in an AOI (Add-On Instruction) using a L84E PLC. Each time I attempt to save my work to the SD card, the program reverts back to the previous value instead of retaining the changes I made to the tag. The specific tag that I adjusted is a Real data type within a user-defined structure. Could this issue be linked to the "required" option? Unfortunately, I am unable to remove the required option as it appears greyed out. How can I resolve this problem with saving changed values in my AOI?
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Hey there, this is a pretty common issue with PLCs, especially dealing with AOIs. One fix that might work involves the tag your working on. Since you mentioned it's a Real data type within a User-Defined structure, make sure the tag isn’t being written anywhere else in the program which can cause it to revert. If it does, the AOI writes will always be last if your AOI is in the main routine. You could move the AOI or change the data flow. Concerning the "required" complication, it usually becomes greyed out if the tag is being used somewhere within the AOI, so you might want to double-check that. Lastly, ensure you're not exceeding your tag memory in the L84E. I hope this helps!
It seems like you are facing a common issue with AOIs on RSLogix 5000. This situation often occurs due to the "required" setting, which automatically reverts to its default value when the instruction is used in a program. Even though specifically the "require" option is greyed out, you can make a copy of the AOI and make your modifications to this copied version instead of the original. This allows you to create a separate AOI where you should be able to modify the tag without it reverting to a previous state. I hope this helps!
It sounds like you're having trouble with your Rockwell controller. The issue might be linked to your SD card. If it’s almost at full capacity, it might be experiencing problems updating and retaining new data changes. Make sure to try clearing some space. Alternatively, your SD card might be write-protected, which could explain why the 'required' option is greyed out. Try to disable this feature if it applies. If neither of these issues seem to be the problem, it may be a programming issue relating to the way your AOI is structured or how the tag was initially created. In any case, don't hesitate to reach out to Rockwell's support team as well. They can often provide some additional assistance or insight.
It sounds like you’re dealing with a tricky situation! The fact that the "required" option is greyed out suggests that there might be constraints based on how the AOI was originally configured. You might want to check the data access settings within the AOI and ensure that the tag you are trying to modify isn’t set to a state that only allows read access. Also, make sure that the values you’re trying to change are being written correctly in the program before saving to the SD card. Sometimes, accessing the tag from the main routine instead of within the AOI can also help clarify if it's a scope issue. If all else fails, consider reaching out to Rockwell's support for insight—they're usually really helpful with these specific challenges. Good luck!
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Answer: - This issue could be related to the "required" option within the tag. If this option is greyed out and cannot be removed, it may be causing the problem.
Answer: - To resolve the problem of not being able to save modified values in an AOI, you may need to address the issue with the "required" option and find a way to remove it if possible.
Answer: - The inability to save modified values in the AOI could be due to the restrictions set by the "required" option that is greyed out. Troubleshooting this option may help in resolving the issue.
Answer: - If you are unable to remove the greyed out "required" option in the tag, you may need to explore alternative solutions or contact the PLC support for further assistance in resolving the saving issue.
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