fuzzy logic with PLC

i like to know more about using Fuzzy Logic in PLCs and what type of PLCs support this matter.

fuzzy logic can be described in this fashion take a glass of water when the cup is full do not pump when the cup is empty pump at its fastest rate when its half full pump at a lesser rate. pretty much all PLC's can do this its a matter of programming the logic see Jack Hughes book on this webpage there is a chapter in it on thesubject

I am not a fan of Fuzzy Logic. However...

http://forums.mrplc.com/index.php?s=&showtopic=12281&view=findpost&p=61883
This is one of the simple/better implementaions I have seen. I still think this could be done just as well with a PID.
You can see that any PLC could execute this fuzzy logic ladder it is that simple.

Interesting thread on MrPLC. Our company recently had a two day course from Rockwell on advanced process control. One of the subjects was their new FuzzyDesigner add on package for RSL5000. We did a lab where we configured fuzzy logic to control PID parameters in a non-linear heating/cooling system. It worked very well, but... the PID parameters were changing on-the-fly. My first question was "What if it was NOT working well? Then what?" There were so many things to adjust!!

Here is a white paper on fuzzy logic with examples specifically geared towards RSL5000 and FuzzyDesigner.

http://resource.controleng.com/contents/pdf/CTLRCWP092507.pdf

good paper thanks Doug