LabView style, the Fuzzy Logic Toolkit is a GUI, a Graphical User Now, we go to the LabView Fuzzy Logic Toolkit which is Often referred to by “linguistic terms,” a way in which to describe the meaningĪnd Actual Position are two easily defined linguistic terms for use as input II: Designing a Simple Fuzzy Logic Controllerįirst, one must determine the input variables and the Logic necessary to writing a LabView Fuzzy Logic Controller. This should suffice to introduce the ideas behind Fuzzy

The set “Over Target”, partially in the set “Close to target”, and partially in

An error value of +8mm can exist partially in For instance, say we have created a feedbackĬontroller that is based on the error of control.

)įuzzy Logic thus allows a degree of set membership. In the following picture, x is wholly in the sets A, B, and C in the traditionalĬan say x is in A to a degree of 0.7, 0.4 in B and 0.5 in C. Of a set or it isn’t, essentially a Boolean 1/0 classification. In traditional set theory, a variable is either an element Way they are helpful for problems that can not easily be set up mathematically, Fuzzy Logic Controllers are intended to “think” like humans do, in this Logic was first developed in the state we know of now by Lofti Zadeh in the 1960’s. Your time is valuable.An Introduction to Fuzzy Logic Controllers in theįuzzy Logic is a variation on set theory where a variableĬan partially be an element of a set. If you do another project I would seriously recommend migrating to one of these. The Vision and especially the new UniStream products are much better at PID and Modbus and easier to make work. You have to really know what you're doing. Jazz controllers are hard to configure for communications - everything has been tacked on to the old M90 operating system after the fact. Unitronics starts counting at zero, Modbus starts counting at 1 so you have to offset the address.Īs an aside, you're running into a lot of difficulty because of what I call the 'Jazz Wall'. The Modbus address for MI 19 is 40020, or Holding Register 20. There is also Help on what you need to do in the SI registers to get Modbus working in that same search for Ethernet. Do you have an Ethernet module installed in the Jazz? If so, search the Help for 'Ethernet' on how to do that. I downloaded your application from your other post and see that you don't have Ethernet configured. For starters, did you download the NI LabView modbus library?

Sample pid controller labview