Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Regulation - tricks u can use to make a base setting and then do some fine tuning

Created by: autobot at: 9/29/2013 2:33 PM (5 Replies)

Rating (0)

Thanks 5

6 Entries

9/29/2013 2:33 PM	Rate (0)
autobot Posts: 4 Rating: (0)	Hello, There are tricks u can use to make a base setting and then do some fine tuning. Best thing u can do (after configurating the FB41) is to put the controller in manual. After the temperature is stable. make a controller output change of 10% (if possible). Then record this in a trend with clear time indication. Now it is important that PV, SP, LMN are fed to the controller as percents (0-100%). So, if the temperature is 0-400°C you have to convert it to 0-100%,. Note, it will work if you don't, but if you want to calculate your base setting, then 0-100% range is neccesary. Now if you have a PT100 input then just chose a valid range and convert this range from 0-100%. Now you can put the times in the attached excel. This will not always work, but for me its always close. And the last tip i can give, is to understand PID parameters. Good luck. Attachment PID CalculatieEng.zip (212 Downloads)
autobot Posts: 4 Rating: (0)	Last edited by: CS Moderator at: 10/14/2013 12:09 PM new subject after splitting from /tf/WW/en/Posts/97898
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users LXG

9/29/2013 10:31 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/21/2023 Posts: 6794 Rating: (1341)	autobot Hello, There are tricks u can use to make a base setting and then do some fine tuning. Best thing u can do (after configurating the FB41) is to put the controller in manual. After the temperature is stable. make a controller output change of 10% (if possible). Then record this in a trend with clear time indication. Now it is important that PV, SP, LMN are fed to the controller as percents (0-100%). So, if the temperature is 0-400°C you have to convert it to 0-100%,. Note, it will work if you don't, but if you want to calculate your base setting, then 0-100% range is neccesary. Now if you have a PT100 input then just chose a valid range and convert this range from 0-100%. Now you can put the times in the attached excel. This will not always work, but for me its always close. And the last tip i can give, is to understand PID parameters. Good luck. Hello, Nice idea for providing tips for tuning based on process reaction curve. There are some points to discuss: Where does calculation come from? Based on which optimization rule calculated (Chien/Hrones/Reswick)? Best regards, Hamid Hosseini
	Last edited by: hdhosseini at: 10/1/2013 6:02 AM Last edited by: hdhosseini at: 9/29/2013 10:40 PM // New Link added Demo Channel on Youtube
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users metwally mustafa

10/1/2013 5:42 PM	Rate (0)
autobot Posts: 4 Rating: (0)	Hello, To be honest, I'm not sure were I get it from,this is what I use for most plants but there will be better formulas to use, I'm sure. But untill now I have found that the settings are close to wat it should be. The Formulas are actually coming from a Manual of a Frequency converter (I think). I have tested these and put it in my excel sheet. I hope somebody can benefit from it. Untill now I have found that all auto tune methods are not working (at least not in the applications in my job).
autobot Posts: 4 Rating: (0)
Suggestion To thank Quote Answer

10/2/2013 4:41 AM	Rate (0)
Raffy Posts: 209 Rating: (2)	Hi autobot... Could you explain how to use this excel you gave?? It might be very helpful for me.. Thanks best regards raffy
Raffy Posts: 209 Rating: (2)
Suggestion To thank Quote Answer

10/2/2013 4:25 PM	Rate (0)
autobot Posts: 4 Rating: (0)	Hello, Just follow the instruction as Iwrote before, see below. There are tricks u can use to make a base setting and then do some fine tuning. Best thing u can do (after configurating the FB41) is to put the controller in manual. After the temperature is stable. make a controller output change of 10% (if possible). Then record this in a trend with clear time indication. Now it is important that PV, SP, LMN are fed to the controller as percents (0-100%). So, if the temperature is 0-400°C you have to convert it to 0-100%,. Note, it will work if you don't, but if you want to calculate your base setting, then 0-100% range is neccesary. Now if you have a PT100 input then just chose a valid range and convert this range from 0-100%. Now you can put the times in the attached excel. This will not always work, but for me its always close. And the last tip i can give, is to understand PID parameters. Good luck.
autobot Posts: 4 Rating: (0)	Last edited by: autobot at: 10/2/2013 4:26 PM
Suggestion To thank Quote Answer

10/11/2013 7:47 AM	Rate (0)
JoeSs Posts: 7 Rating: (0)	Thank you on your answer. Sometimes it seems impossible to make it perfect.
JoeSs Posts: 7 Rating: (0)
Suggestion To thank Quote Answer
This contribution was helpful to 3 thankful Users S_Moderator hdhosseini metwally mustafa

|

Share this page:

Share this page on...

Follow us on