Hello Emil,
I attached the data sheet where the PCP Objects are described.
You can find all the information about PCP on page 19.
Note: even without PCP you can use the Processdata in the ProcessDataAssignment without the functionblocks.
(that way you dont have to access the module via PCP and can write your own Functionblock or access the modules data in a program.)
kind regards,
O. Warneke