10/5/2017 8:59 PM | |
Posts: 11 Rating: (0) |
I am really grateful for your help. The program makes a lot of sense, and I have already learned a lot of things. I've been thinking about the solution after I have seen your programming. Instead of having the 4 steps as intervals, would it then be possible to have T1 it as a reverse linear function of T2? E.g. A stepless solution where the AQ1 PI SP would move linear from 55 to 70 based on T2's movement from +10 to -10? ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 10/27/2017 6:45:32 AMNew subject after splitting |
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10/6/2017 10:20 AM | |
Joined: 12/18/2014 Last visit: 9/25/2024 Posts: 33835 Rating: (4205)
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In attachment a possible suggestion. The Excel file is used to calculate GAIN and OFFSET for setpoints in the LOGO! program. The temperature values are evaluated with 2 decimal places. The setpoint for the PI controller depends on the outside temperature. If, as a result of the calculation, the setpoint value is less than 55.00 ° C or greater than 70.00 ° C, it is limited in the respective direction. Attachmentrakjaer.zip (178 Downloads) |
10/6/2017 3:17 PM | |
Joined: 12/18/2014 Last visit: 9/25/2024 Posts: 33835 Rating: (4205)
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To point A) To point B) To point C) To point D) in attachment the changed files. Attachmentrakjaer_V2.zip (167 Downloads) |
10/9/2017 9:32 PM | |
Posts: 11 Rating: (0) |
Hi Again, thanks for your answers. I am not sure if I understand point A) as I can chose a standard function in the function blogs for PT100/1000 which gives me the correct value instantly? Anyways, I seemed to find a way to incorporate the values into my existing functions (I basically only needed AI1 as trigger for my other functions). I have also modified the text message a bit, however, after I downloaded it to the LOGO! it would not show the message. With my old (old simple) setup it would show the text message just fine which is why I am puzzled. Needless to say I reverted to my old setup as I could not see any of the values on the LOGO! while testing. I have uploaded the file with the additions I made. AttachmentStyring med udetemperatur - 09-10-2017.zip (169 Downloads) |
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