Term
Abbre-
viation
Description
Communication Control Unit --- An interface unit for CIP Safety communications between a Safety CPU
Unit and a CIP Safety on EtherNet/IP device on a network.
primary periodic task --- The task with the highest priority.
Refer to the software user
’
s manual for the connected CPU Unit or In-
dustrial PC for details.
process data --- Collection of application objects designated to be transferred cyclically
or acyclically for the purpose of measurement and control.
process data object PDO A structure that describes the mappings of parameters that have one or
more process data entities.
process data communications --- One type of EtherCAT communications in which process data objects
(PDOs) are used to exchange information cyclically and in realtime.
This is also called PDO communications.
Terminology
37
NX-series System Units User's Manual (W523)