Festo CPX-FB38, Electronic Manual

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2. Commissioning
2−28
Festo P.BE−CPX−FB38−EN en 0804NH
There are two different communication mechanisms in a
CANopen system.
The Process Data Objects (PDO) serve the fast transfer of
processing data and are transmitted by simple EtherCAT
messages without protocol overhead. Process Data Objects
can be transmitted event−controlled, synchronous to a system
pulse sequence or on demand.
The Service Data Objects (SDO) form a point−to−point
connection and permit access to every entry in the object
directory of a node.
Use application−specific programs created according to your
preferences to access these data objects.
2.4.3 CPX terminal configuration using Beckhoff TwinCAT
(EtherCATnetwork configuration)
The subsequent sections describe the major configuration
steps using the configuration and programming software
Beckhoff TwinCAT.
Other PLC systems may require different settings or
procedures.
Configuration examples presented in this section are based
on the utilization of a typical office PC and the configuration
and programming software package Beckhoff TwinCAT (PLC)
Version2.10.