Greetings, Are you searching for a PLC logic add-on that allows you to choose the number of analog inputs and produces a single output value? This output value would represent the % ratio addition of the selected inputs. For example, if the 1st PV value is 500 with a ratio of 30%, the 2nd PV value is 1200 with a ratio of 40%, and the 3rd PV value is 900 with a ratio of 30%. The total percentage should not exceed 100%, ensuring that a single PV value is generated. For more details, please refer to the diagram attached below. Thank you.
The PlantPAx AOI P_AInMulti offers support for up to 8 analog inputs, but it lacks native functionality for weighted averages, only allowing for straight averages or individual input selection.
I followed these instructions but required the specified configuration as mentioned earlier.
Hi there, Indeed, to manage and compute these percentages from various inputs, the right PLC add-on would be crucial. Your concept of deriving a single output from multiple proportional inputs is fascinating. It adds flexibility and intelligence to the control process. However, I'd suggest using a normalizing or weighting function in your PLC code to achieve your goal. Do keep in mind the concern of not exceeding 100% total ratio - it will require setting up certain constraints or failsafes within the system. Remember, the suitability of a solution will ultimately be determined by your specific application needs. Looking forward to seeing your progress on this interesting project!
Hello, Yes, I've been looking for an add-on just like that. It should create efficient process controls and allow us to have a more manageable output value. But, I'm interested in learning about its adaptability. Will it be compatible with assorted PLC brands or do we need specific ones? Also, how easy is it to adjust the percentages as our process requirements change? The goal is to have a flexible system that can cater to varying inputs. Thank you for sharing this solution, it seems very promising. I'm eager to explore it further.
That sounds like an interesting project! Just to clarify, are you looking for a specific PLC software that can handle these calculations, or are you more interested in the logic behind it? If it’s the latter, you might consider using a weighted average approach where each input's value is multiplied by its corresponding percentage, summed up, and then normalized to ensure it stays within your 100% limit. Also, if you're using a specific PLC brand, check if they have built-in functions for handling such analog inputs, as that could simplify your setup. Good luck!
This sounds like a really interesting project! Implementing a PLC logic add-on to handle those analog inputs and calculate the weighted output is definitely feasible. Just make sure to incorporate a validation step to check that the total ratios don't exceed 100% before calculating the output. Have you thought about how you’ll handle situations where the input values might change dynamically? It could be helpful to build in some error handling or warnings for unexpected input scenarios. Looking forward to seeing how your diagram comes together!
Hey there! This sounds like a cool project! Have you considered using a scaling function in your PLC to handle the ratio calculations? You could set up a logic that normalizes the input values based on their percentages, ensuring the total always sums to 100%. It might also be useful to include some error handling for cases where the ratios don’t add up correctly. Looking forward to seeing how it turns out!
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Answer: - The purpose of the PLC logic add-on is to enable the selection of multiple analog inputs and calculate a single output value representing the % ratio addition of the selected inputs.
Answer: - The PLC logic add-on includes functionality to ensure that the total percentage of the selected inputs does not exceed 100%, thus guaranteeing that a single output value is generated.
Answer: - Sure, for example, if the 1st PV value is 500 with a ratio of 30%, the 2nd PV value is 1200 with a ratio of 40%, and the 3rd PV value is 900 with a ratio of 30%, the add-on would calculate the total percentage and generate a single output value based on these input values.
Answer: - Yes, a diagram is mentioned to be attached below in the discussion thread for more details on how the PLC logic add-on works.
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