on which method pidtool command selects parameters of PID?

I have a question... Is the command pidtool based on Ziegler Nichols tuning method? where if the open loop responce is S shaped curve then parameters of PID is found using

Kp=1.2(T/L) TI=2L TD=.5L

 The inflation point will give Values of T and L........

Answer 1

[Arkadiy Turevskiy]

Please see here