Hello, I have a pair of redundant 1756-L71 controllers with a firmware version of 24. These controllers are currently connected to 3 other compact logix PLCs through produced and consumed tag interfaces, which are functioning well. I am now looking to integrate a 4th CompactLogix 1769-L30ER PLC into the system and establish produced and consumed tag connections with the existing redundant pair. My goal is to minimize downtime by leveraging the redundancy feature. However, I am unsure if I can take one of the L71 controllers offline to configure the new tags and have the changes automatically synchronized with the online controller. I have searched through the redundancy controllers manual and the produced and consumed tags manual but have not found a solution yet. Any guidance on this matter would be greatly appreciated. Thank you, JP.
Is there a way to add produced/consumed tags without downloading, whether redundant or non-redundant? Synchronizing a live controller program to integrate changes from an offline program can be quite challenging. Does any manufacturing controller offer support for this functionality?
I'm uncertain, but it appears that having a good feature is essential when investing in a redundant system. Thank you for your response!
Hi JP! In terms of maintaining your system's uptime while integrating new PLC, your proposed approach should work. Temporary disruptions are usually manageable when only one controller from the redundant pair is taken offline. You should be able to configure it with the new tags, then when it's reconnected, the changes should automatically synchronize with the other controller. However, a caveat to remember, it's crucial to check that your redundancy system is in a healthy state before proceeding and ensuring that the remaining online controller has enough capacity to handle the full load. I'd also suggest running a simulation test on another system to ensure deployment goes as smoothly as possible.
Hi JP, in general, you should be able to update the tags on the offline controller without interrupting the online processing, and they will synchronize when you switch back. However, I would recommend testing this concept through offline simulations before implementing it on the actual equipment to minimize any potential risks. Also, make sure to back up all your controller data before you start, just in case. It's a good practice that can save you from unexpected problems. Good luck with your project!
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Answer: - Yes, you can integrate the 1769-L30ER PLC into the system and establish produced and consumed tag connections with the existing redundant pair.
Answer: - To minimize downtime, you can consider taking one of the L71 controllers offline to configure the new tags and have the changes automatically synchronized with the online controller.
Answer: - While the manuals may not provide a direct solution, consulting with Rockwell Automation support or community forums might offer guidance on integrating produced and consumed tags with redundant controllers for CompactLogix PLCs.
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