B.1.4 Transferring Input And Output Data - Festo CPX-FB13 Manual

B. General DP master

B.1.4 Transferring input and output data

Data_Exchange
B−10
The cyclic exchange of data is accomplished with the
function Data_Exchange.
With this function the output data for CPX terminals are
transmitted as an octet string of length x. The octet string
length depends on the number of identifier bytes.
Note
With the function Data_Exchange, the CPX terminal
expects the output information 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 0811c