Using a generated function from Neural Network Toolbox

Hello everyone, I am confused about using the function generated by neural network toolbox. I will use the function in a MATLAB script inside LabVIEW, but it appears that I need to send the actual and the past values of the variables to LabVIEW in every iteration. This is true? My desire is to use the neural network as a controller that receives an input and generates an output, but I'm a little confused about how can I do this.