Terminology - Omron NX-ECC201 User Manual

Terminology

Terminology
Term
application layer status, AL status
CAN application protocol over Ether-
CAT
CAN in Automation
Communications Coupler Units
device profile
device variable
distributed clock
EtherCAT slave controller
EtherCAT slave information
EtherCAT state machine
EtherCAT Technology Group
I/O map settings
I/O port
I/O refreshing
index
network configuration information
NX bus
object
object dictionary
Operational
PDO communications
Pre-Operational
primary periodic task
process data
process data communications
process data object
receive PDO
32
Abbre-
viation
--- 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 develops
and supports higher-layer protocols.
--- The generic name of an interface unit for remote I/O communications on
a network between NX Units and a host network master.
--- A collection of device dependent information and functionality providing
consistency between similar devices of the same device type.
--- A variable in the NJ-series CPU Unit to which process data on an Ether-
CAT slave is allocated. Slave process data is accessed by directly read-
ing and writing device variables from user applications on the NJ-series
CPU Unit.
DC Clock distribution mechanism used to synchronize EtherCAT slaves and
the EtherCAT master.
ESC A controller for EtherCAT slave communications.
ESI An XML file that contains setting information for an EtherCAT slave.
ESM An EtherCAT communications state machine.
ETG The ETG is a global organization in which OEM, end users, and technol-
ogy providers join forces to support and promote the further technology
development.
--- Settings that assign variables to I/O ports. Assignment information
between I/O ports and variables.
--- A logical interface that is used by the CPU Unit to exchange data with an
external device (slave or Unit).
--- Cyclic data exchange with external devices that is performed with prede-
termined memory addresses.
--- Address of an object within an application process.
--- The EtherCAT network configuration information held by the EtherCAT
master.
--- The NX-series internal bus.
--- An abstract representation of a particular component within a device,
which consists of data, parameters, and methods.
OD Data structure that contains description of data type objects, communi-
cation objects and application objects.
--- A state in EtherCAT communications where SDO communications and
I/O are possible.
--- An acronym for process data communications.
--- A state in EtherCAT communications where only SDO communications
are possible with the slaves, i.e., no I/O can be performed.
--- The task with the highest priority.
--- Collection of application objects designated to be downloaded cyclically
or acyclically for the purpose of measurement and control.
--- 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.
PDO A structure that describes the mappings of parameters that have one or
more process data entities.
RxPDO A process data object received by an EtherCAT slave.
Description
NX-series EtherCAT Coupler Unit User's Manual (W519)