Mia Posted August 19, 2019 Report Share Posted August 19, 2019 Hello! I'd like to make a PI(D) without auto-tune, so that I can determine P and I myself (D is going to be zero). Which FB do I use? -Mia Quote Link to comment Share on other sites More sharing options...
MVP 2022 Flex727 Posted August 19, 2019 MVP 2022 Report Share Posted August 19, 2019 Assuming you are using a Vision PLC (you also posted this question in the UniStream forum), then you can always determine and set P, I, & D, with or without Auto-tune. When you set up the PID Configuration, you assign operands to the P, I, & D. Just manually place values in those operands, either through HMI entry or Power-Up and you are good to go. Quote Link to comment Share on other sites More sharing options...
MVP 2022 Flex727 Posted August 19, 2019 MVP 2022 Report Share Posted August 19, 2019 Oh, I see I may have misinterpreted your question. You would still use the PID Auto-tune even if you don't plan to use the Auto-tune functionality. Quote Link to comment Share on other sites More sharing options...
Mia Posted August 19, 2019 Author Report Share Posted August 19, 2019 1 minute ago, Flex727 said: Oh, I see I may have misinterpreted your question. You would still use the PID Auto-tune even if you don't plan to use the Auto-tune functionality. I forgot to mention that I use v570. And that was my concern. As there seems to be a FB just for PID configuration and then also the auto-tune one. So I should use the auto-tune one and just insert the PID values myself? Quote Link to comment Share on other sites More sharing options...
MVP 2022 Flex727 Posted August 19, 2019 MVP 2022 Report Share Posted August 19, 2019 35 minutes ago, Mia said: So I should use the auto-tune one and just insert the PID values myself? Yes. The PID Config without Auto-tune is an older version that remains there for non-Enhanced Vision products. Your V570 is an Enhanced Vision product and should use the PID Auto-tune FBs. Besides the P, I, & D, be sure you enter values for: Sample Time Process Value Low & High Control Value Low & High and of course, target value. Quote Link to comment Share on other sites More sharing options...
Mia Posted August 19, 2019 Author Report Share Posted August 19, 2019 45 minutes ago, Flex727 said: Yes. The PID Config without Auto-tune is an older version that remains there for non-Enhanced Vision products. Your V570 is an Enhanced Vision product and should use the PID Auto-tune FBs. Besides the P, I, & D, be sure you enter values for: Sample Time Process Value Low & High Control Value Low & High and of course, target value. Thank you! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.