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STEP 7 Additional Software

pid controller

Thread Starter: mhmd kotb Started: 6/22/2012 1:14 AM Replies: 1

6/22/2012, 1:14 AM

mhmd kotb

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what is the physical meaning of pid controller and how i can use it in step 7 300?

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6/22/2012, 2:03 AM

dchartier

Joined 9/27/2006

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Hello Mohammed;

For the first part of the question, I suggest you read a few bits of information:
1. an generic explanation od process control with PID loops:

PID controller - Wikipedia, the free encyclopedia

2. a recent discussion on closed-loop control on the forum

need an explantion about PID on s7 1200

I suggest you take the time to open and read the links from the Ron Beaufort site, they are very instructive for first-time discoverers of PID loops.
There are also many other threads on PID control on the forum, search for them using the Search box at the right of this page.

For the second part of your question, you must look up FB 41 (or SFB 41) in the online help of Simatic manager, or in the document "System and Standard functions.
System Software for S7-300/400 System and Standard Functions Volume 1 and Volume 2

And on various FAQs you will find on the subject in the forum:

What should you watch out for when calling and assigning parameters to the controller functions in function blocks (S)FB41, (S)FB42 and (S)FB43?

Where can you find descriptions and examples of PID control with FB 41, FB 42 and FB 43, and SFB 41, SFB 42 and SFB 43?

Hope this helps,

Daniel Chartier

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Thank you for this post from:

hdhosseini

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