7/13/2012 11:07 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello , This is a big question,Where do you test your thoughts? Matlab or STEP7?If you are working PID in STEP7 ,refer to this giant collection of examples on FB41 with process simulation functions available: HD_PID Control Package - FB41 Samples What you want to implement a ODE from laplace transform to numeric equivalent is discussed here: Numeric Methods to Solve ODEs(Ordinary Differential Equations ) Please check the links provided and update. Best regards Hamid Hosseini |
Last edited by: hdhosseini at: 7/13/2012 1:04 PM//typo |
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7/13/2012 11:39 AM | |
Posts: 36 Rating: (1) |
Hii, i made it from MATLAB. i just wanna make it in PLC with those plant transfer functions. Firza |
7/13/2012 11:48 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello again, It is not difficult to implement that in STEP7.You can try this project(hd_FB41_EX.zip) and FB1 presented here. Please try your own solution by checking 2 mentioned cases. This is a simple practice in STEP7environment. We never provide final solution for people, we just correct their errors to reach faster to the best solution. Best regards, Hamid Hosseini |
7/13/2012 11:55 PM | |
Posts: 36 Rating: (1) |
how about the feedback transfer function? |
7/14/2012 5:41 AM | |
Posts: 36 Rating: (1) |
hiii,, should i simplify those loop TF= G/(1+G)? waht is the sequence of that loop? |
7/14/2012 9:55 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365)
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Hello , Simplifying a control loop is possible if you know transfer function of all elements.It is a common method of offline analysis in academic control literature.What we do here is online optimization and control.If you have basic STEP7 knowledge,I suggest checking this sample(1.zip ) which utilizes FB41 as PID controller and FB3 as 2nd order system (process). Best regards Hamid Hosseini |
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