Time response

we are trying to implement a remote IO in our DCS infi90 using BRC410 and S800 IOs in a stare configuration with 3 branches using IOR800 and TB825 . at each branch we have TB820 hooked to 6 IO modules. by using function 121,122... and 127/128 is there any delay time consideration to take in account , in other terms is there a risk that the information from the S800 IO module delayed to arrive in the BRC410 ?

many thanks