Help to translate LAD diagrams to FBD and STL
- Thread starter Automa8
- Start date
jstolaruk
Lifetime Supporting Member
The contacts and coils are missing addresses / tag names. Impossible to get it correct without them, some may be used to seal the rung.
You would first need to convince me that this isn't a homework problem, or otherwise for school.
If you give it a try, people on the forum may help guide you. If you just want someone to do it for you, probably not going to get lucky.
If you give it a try, people on the forum may help guide you. If you just want someone to do it for you, probably not going to get lucky.
cardosocea
Member
Considering you mentioned STL... are you by any chance using Siemens? If so, Step7 converts between Ladder and those two languages if required.
This being said, converting to FBD will be trivial as it will be a direct translation of the logic as you see it. Converting to STL will be a bit harder until you get the hang of grouping instructions.
Neither is rocket science... so you should be able to do it easily.
This being said, converting to FBD will be trivial as it will be a direct translation of the logic as you see it. Converting to STL will be a bit harder until you get the hang of grouping instructions.
Neither is rocket science... so you should be able to do it easily.
Agree with that
This actually is a school task, but as ridiculous it seems, our teacher has not taught us nothing about FBD and STL. We have a lesson called "PLC controllers" where we program Siemens LOGO! controllers with LOGO! SOFT 6.0. So far we have only used LAD diagrams. Now the lessons ended, but if we want to get our marks, we have to complete the task above. And yeah, there are no tags on contacts like I0.0, I0.1.
Anyway I'd be happy if someone would do only one of these four or give me some reference from the internet about these conversions. And I checked that STEP7 by Siemens needs some license to use it. Is there any freeware software to convert LAD - FBD? I also have heard about software called CoDeSys. Please give me some advice on that.
I appreciate your effort!
Anyway I'd be happy if someone would do only one of these four or give me some reference from the internet about these conversions. And I checked that STEP7 by Siemens needs some license to use it. Is there any freeware software to convert LAD - FBD? I also have heard about software called CoDeSys. Please give me some advice on that.
I appreciate your effort!
cardosocea
Member
Off the top of my head, LOGO doesn't use STL... so there's that. I only have version 8, does version 6 use STL? If not, perhaps it should be interesting to raise this with your school.
If you open the FBD editor, you can see that it is fairly straightforward to write logic... it takes getting used to, but it's possible to translate from Ladder fairly easily.
Step7 can be used for 21 days without a license, so it would work for you.
To convert between Ladder and the other languages press Ctrl+2 for STL and Ctrl+3 for FBD.
The result will look ok-ish in FBD... but really odd in STL.
Exercise B is interesting because you can't convert it in Step7... however, you can OR that contact with the value 1 to have the same effect.
At the end, this is a useless exercise and your professor should be fired or perhaps start teaching philosophy.
If you open the FBD editor, you can see that it is fairly straightforward to write logic... it takes getting used to, but it's possible to translate from Ladder fairly easily.
Step7 can be used for 21 days without a license, so it would work for you.
To convert between Ladder and the other languages press Ctrl+2 for STL and Ctrl+3 for FBD.
The result will look ok-ish in FBD... but really odd in STL.
Exercise B is interesting because you can't convert it in Step7... however, you can OR that contact with the value 1 to have the same effect.
At the end, this is a useless exercise and your professor should be fired or perhaps start teaching philosophy.
I just created an account on Siemens, but there are several versions of STEP7 like Graph, SCL, PLCSIM. Should I use the last one or what exact version? Can someone please share a link of the version I need? Just not so familiar with that stuff. As I said, we only used one software - LOGO! Soft Comfort 6.0.
cardosocea
Member
I believe this is the link you are looking for:
https://support.industry.siemens.co...nload-simatic-step-7-v5-5-sp4-?dti=0&lc=en-WW
The packages you mention are add ons to the normal Step7, however for this you would need only the basic software.
Also, when you get the grade for this, do you mind posting it here?
https://support.industry.siemens.co...nload-simatic-step-7-v5-5-sp4-?dti=0&lc=en-WW
The packages you mention are add ons to the normal Step7, however for this you would need only the basic software.
Also, when you get the grade for this, do you mind posting it here?
cardosocea
Member
Odd, mine comes within minutes and I'm in the UK.
As you are using Siemens logo to create the ladder, doesn't the Siemens Softcomfort convert it to FBD just by clicking the convert button.
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