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PID controls that use FB 41

Created by: Martins_Eng at: 1/14/2012 6:32 AM (7 Replies)

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1/14/2012 6:32 AM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 7/26/2022 Posts: 184 Rating: (0)	Friend, the PID controls that use FB 41are not in a cycle that can affect the OB35 desenpenho of my logic, not to use the FB into the OB35, as each one is in FC Fb41
	Last edited by: Martins_Eng at: 1/14/2012 7:40 AM
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1/14/2012 8:36 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/21/2023 Posts: 6794 Rating: (1341)	Martins_Eng Friend, the PID controls that use FB 41are not in a cycle that can affect the OB35 desenpenho of my logic, not to use the FB into the OB35, as each one is in FC Fb41 Dear Martins_Eng, It is important to call FB41 in a cyclic interrupt OB (e.g OB35). It is also to determine time interval between to successive call as the "CYCLE" parameter to properly adjust paces of the algorithm. Please also check the "Program Structure" even in cross refernce or LAD/STL/FBD editor.FB41 should be called in one of the cyclic interrupts OB3X.Also possible to call several FB41 in a Function and then call that function in OB3X (Partitioned Programming!). Best regards, Hamid Hosseini
	Demo Channel on Youtube
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1/14/2012 4:20 PM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 7/26/2022 Posts: 184 Rating: (0)	It is possible to use this with CF Fb inside out instead of using OB35 to OB34 directly on Fb ie OB35 -> FC12, FC13, FC14 as CFs already has all the logic?

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1/14/2012 5:15 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/21/2023 Posts: 6794 Rating: (1341)	Martins_Eng It is possible to use this with CF Fb inside out instead of using OB35 to OB34 directly on Fb ie OB35 -> FC12, FC13, FC14 as CFs already has all the logic? Dear Martins_Eng, Your question is not clear to me.You mean do not call control functions inside the cyclic interrupt OBs (OB3X)? Best regards, Hamid Hosseini
	Last edited by: hdhosseini at: 1/14/2012 5:16 PM Demo Channel on Youtube
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1/14/2012 6:46 PM	Rate (0)
Jazz_M Gold Member Joined: 9/6/2008 Last visit: 5/7/2022 Posts: 1121 Rating: (86)	Hi do you mean to call your fc 12 etc in OB 35 !!!!! Yes you can call your functions in OB please explain us little clearly have fun ...
	Jazz
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1/15/2012 1:24 PM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 7/26/2022 Posts: 184 Rating: (0)	Dear colleague I was told to put the call into the OB35 CFs because today I have already in the FB41 FC11 and I wonder if I use the call within the FC11 Ob35 be correct. see the example Attachment exemp.zip (112 Downloads)

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1/15/2012 7:04 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/21/2023 Posts: 6794 Rating: (1341)	Martins_Eng DearcolleagueIwastoldto put thecallintotheOB35CFsbecause todayI havealreadyintheFB41FC11and I wonderif I use thecallwithin theFC11Ob35be correct. see the example Dear Martins_Eng, This is what I do suggest to do, call FB41 twice in FC1 and then call FC1 in OB35.See the attachment for more hints! Best regards, Hamid Hosseini Attachment ONE.zip (113 Downloads)
	Demo Channel on Youtube
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4/24/2015 9:29 AM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4825 Rating: (123)	New question published by Vijay N. is split to a separate thread with the subject Implementing PID algorithm with 3 process Value and One actuator!. Best regards Min_Moderator

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