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GRAFCET to Ladder Conversion

medbadr Posted messages 2 Status Member -  
dav2303 Posted messages 1 Status Member -
Bonjour à tous ! Voilà, je débute sur le logiciel RSLogix500 et je voudrais un coup de main pour pouvoir convertir un GRAFCET en langage échelle (cours ou exemple) ! Merci d'avance et à+

3 answers

Answer 1 / 3
ricoulefou Posted messages 57 Status Member 8
 
Hello
GRAFCET ladder conversion?
Use memory bits for each step:
If m0.1 then do ....
Then you reset your bit and activate another one for the second step and so on...
I don't know if I'm clear, but that's how I do it under Siemens since I don't have the GRAFCET option (and instead of doing it in ladder, I do it in list).
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Answer 2 / 3
auber
 
HELLO
I DON'T HAVE the solution, but I am a beginner and I would like to know what this software is because I am preparing for a DUT. I have started with the GRAFCET but I can't read them correctly. I need help and advice.
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ee&e&
 
Because you didn't keep up with your GRAFCET classes in SED and you didn't understand the lab work.
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Answer 3 / 3
dav2303 Posted messages 1 Status Member
 
You can do it with the SET and RESET coils: For example

condition 1 = SET step 1

condition 2 = reset step 1 and Set step 2
But be careful that each condition is unique, otherwise we will activate two steps at the same time.....

Personally, I do it with words in which I store the value of the graph step:

Condition 1 and MW=0 => MW:=1
Condition 2 and MW=1 => MW:=2

We ensure that we always have the previous step before activating the next one. And by visualizing the state of the words, we always know where we are!

Then you can also do it with JUMP but it is very difficult to visualize the state of the graph since when you JUMP, you deactivate the previous block to activate the next one.
On the other hand, this provides the greatest operational safety.

Hope this helps you++
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