Festo CPX-FB6 Electronic Manual page 114

A. Technical appendix
A−6
Function of the PCP channel
In addition to I/O data, complex data records can also be
transmitted via the Interbus. The transmission of e.g. the fol
lowing information is therefore possible:
parametrizing information
diagnostic information
Communication is made via the Peripheral Communication
Protocol" (PCP or PCP channel). Field bus slaves, which sup
port communication via the PCP channel, are designated PCP
slaves.
The PCP channel possesses the following features:
Parameters are transmitted sequentially.
Parameter data are transmitted in 16−bit packages.
8 bits of parameter data and 8 bits of administrative data
are transmitted per data cycle.
Taken apart" and put together" the parameter data
takes place via the Interbus protocol chip (SUPI).
Festo P.BE−CPX−FB6−EN en 0402b