neural network prediction of unknown data

i have five input variables for cnc wirecut edm and considering two responses.my project is based on prediction of unknown data from trained neural network.totally 27 experiments i had completed. then 22 data are fed into the training process in neural network. remaining 5 data are used in testing for the prediction. now my problem how i set the max fail and maximum iteration in neural network application tool box in matlab14. and also weather its possible to make an equation based on weight and biases for the response after the training and testing is completed