I am using Allen Bradley PLC with RS Logix 5000 and RS Tune. I have used the PIDE function block which has a feature for auto tune. Though the autotune software calculates a FOTPD model and gives the desired P, Ti and Td values, I would like to know as to which exact tuning formulae from the theory it is utilising to calculate the same. Also, the anti reset windup feature which is avaiable, uses which strategy of Anti Reset Windup?