Glossary - Omron NX701-17 Series User Manual

A-4

Glossary

Use the following list of EtherCAT terms for reference.
Term
AL status (application layer status)
CAN application protocol over Ether-
CAT
CAN in Automation
device profile
device variables
distributed clocks
EtherCAT Master Function Module
EtherCAT slave controller
EtherCAT slave information
EtherCAT state machine
EtherCAT Technology Group
index
network configuration information
object
object dictionary
Operational
packet monitoring
PDO communications
Pre-operational
process data
process data communications
process data object
receive PDO
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Abbrevia-
tion
−
Status for indicating information on errors that occur in an application
on a slave.
CoE A CAN application protocol service implemented on EtherCAT.
CiA CiA is the international users' and manufacturers' group that devel-
ops and supports higher-layer protocols.
−
Collection of device dependent information and functionality provid-
ing consistency between similar devices of the same device type.
−
Variables in the NJ/NX-series CPU Unit to which process data on
EtherCAT slaves are allocated. Slave process data is accessed by
directly reading and writing these device variables from user applica-
tions on the NJ/NX-series CPU Unit.
DC Clock distribution mechanism used to synchronize EtherCAT Slave
Units and the EtherCAT Master Units.
−
One of the function modules. This module controls the EtherCAT
slaves as the EtherCAT master.
ESC A controller for EtherCAT slave communication.
ESI An XML file that contains setting information for an EtherCAT Slave
Unit.
ESM An EtherCAT communication state machine.
ETG The ETG is a global organization in which OEM, End Users and
Technology Providers join forces to support and promote the further
technology development.
−
Address of an object within an application process.
−
The EtherCAT network configuration information held by the Ether-
CAT master.
−
Abstract representation of a particular component within a device,
which consists of data, parameters, and methods.
OD Data structure addressed by Index and Sub-index that contains
description of data type objects, communication objects and applica-
tion objects.
−
A state in EtherCAT communications where SDO communications
and I/O are possible.
− A function that enables the EtherCAT master to capture packets flow-
ing over an EtherCAT line and store them in the master. You can start
and stop capturing packets from the Sysmac Studio or with EtherCAT
communications instructions.
−
An acronym for process data communications.
−
A state in EtherCAT communications where only SDO communica-
tions are possible without being able to perform I/O.
−
Collection of application objects designated to be downloaded cycli-
cally or acyclically for the purpose of measurement and control.
− One type of EtherCAT communications that uses process data
objects (PDOs) to exchange information in realtime with a fixed
cycle. This is also called PDO communications.
PDO Structure described by mapping parameters containing one or sev-
eral process data entities.
RxPDO A process data object received by an EtherCAT Slave Unit.
Appendices
Description
A
A-31