Festo CPX-FB6 Manual page 123

A. Technical appendix
Festo P.BE-CPX-FB6-EN en 1207c
Function of the PCP channel
In addition to I/O data, complex data records can also be
transmitted via the Interbus. The transmission of the follow-
ing information, for example, is therefore possible:
– parametrisation information,
– diagnostics information.
Communication is made via the "Peripheral Communication
Protocol" (PCP or PCP channel). Fieldbus stations that sup-
port communication via the PCP channel are designated PCP
stations.
The PCP channel possesses the following features:
– Parameters are transmitted sequentially
– Parameter data are transmitted word by word in 16-bit
packages
– Per data cycle, 8 bits of parameter data and 8 bits of ad-
ministrative data are transmitted
– "Breaking up" and "Putting together" the parameter data
takes place via the Interbus protocol chip (SUPI).
A-7