Transferring Input And Output Data - Festo CPX-FB13 Electronic Manual

A. Technical appendix
A.2.4 Transferring input and output data
Data_Exchange
A−12
The cyclic exchange of data is carried out with the function
Data_Exchange.
The output data for CPX terminals are transferred as an octet
string of length x with this function. The length of the octet
string is determined by the number of identifier bytes.
Please note
With the function Data_Exchange, the CPX terminal awaits
the output data for the valves and electric outputs.
The input data are sent to the master as a reply telegram.
Festo P.BE−CPX−FB13−EN en 0308a