haas indexer serial protocol ?

[pit202]

hi all ,

i have a toolroom1 , from time to time i get rotary work
to do, i wounder if there is a way to do a 4tx indexer
axis alone. with the mechanical part i`ll have no problems.

i saw on the machine a second serial port, and i know
how to enable additional axis on my controller, i know
the machine sendt a package with 4 bytes and await
response , the think is - i don`t know what to answer.

and here is my question : can somebody help me with that ?
maybe someone haas a serial specification ? can someone
sniff on the serial port and tell me what`s going on ?

i really have no money to buy a oryginal indexer , this
is the only way i can help myself ;(

thanks and regards from poland,
Piter